From: owner-ibis-users@eda.org (ibis-users) To: ibis-users-digest@eda.org Subject: ibis-users V1 #88 Reply-To: Sender: owner-ibis-users@eda.org Errors-To: owner-ibis-users@eda.org Precedence: bulk ibis-users Wednesday, November 8 2006 Volume 01 : Number 088 ---------------------------------------------------------------------- Date: Mon, 9 Oct 2006 08:10:49 +0800 From: "NG,MEI-YEE" Subject: RE: [IBIS-Users] S2IBIS3 V1_1 This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6EB37.60458FD1 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi Ambrish, =20 Could you kindly be more specific on the -root command below? For example, in which directory should I type the -root command? I am currently doing it in s2ibis3_v1_1/examples/ex1 directory, where buffer.s2i is located. Besides, I'm running this in Linux using c-shell, hence I typed the following: =20 Source s2ibis3 -root ../../ -s2ibis3 buffer.s2i =20 However, I get the message s2ibis3: No such file or directory. =20 I also tried using this command: s2ibis3 -root ../../ -s2ibis3 buffer.s2i =20 and I get: s2ibis3: Command not found =20 Kindly advice on how I should proceed. =20 Thanks. =20 Best regards,=20 Mei Yee =20 ________________________________ From: Ambrish Varma [mailto:akvarma@ncsu.edu]=20 Sent: Friday, October 06, 2006 10:56 PM To: NG,MEI-YEE; 'Mirmak, Michael'; ibis-users@eda.org Subject: RE: [IBIS-Users] S2IBIS3 V1_1 =20 Hello Mei Yee, You need to use the '-root' option in your command to let java know where your classes are. Please refer to question C1 in the s2ibis3 FAQ page (http://www.ece.ncsu.edu/erl/ibis/faq/S2IBIS3_FAQ.htm ) Thanks, Ambrish. =20 - --Ambrish Varma North Carolina State University ph(919)513-2015, fax(919)515-2285 ________________________________ From: NG,MEI-YEE [mailto:mei-yee.ng@avagotech.com]=20 Sent: Friday, October 06, 2006 5:04 AM To: Ambrish Varma; Mirmak, Michael; ibis-users@eda.org; ibis-info@eda.org Subject: RE: [IBIS-Users] S2IBIS3 V1_1 =20 Hi all, =20 Sorry to bombard you guys with emails. But with reference to the below issue of undefined javadir, I added the line=20 Set javadir =3D "/opt/j2re1.4.2_12/bin/java" (as shown by = the screen shot) Is this the right way to get around it? =20 However, right now I get a different error message : Exception in thread "main" java.lang.NoClassDefFoundError: s2ibis3 (as shown by the attachment). =20 Kindly advice on this issue. =20 Thank you. Best regards, Mei Yee =20 ________________________________ From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of NG,MEI-YEE Sent: Friday, October 06, 2006 4:38 PM To: Ambrish Varma; Mirmak, Michael; ibis-users@server.eda.org; ibis-info@server.eda.org Subject: [IBIS-Users] S2IBIS3 V1_1 =20 Hi there, =20 I have downloaded and installed Java 2 RE version 1.4.2_12 into my linux machine. I would like to run s2ibis3's examples, i.e. ex1. I read in the README file that I could try it out by typing=20 s2ibis3.csh -s2ibis3 buffer.s2i. =20 Since I'm using it in cshell, I used a 'source' in front the command to run it. However, I always get the error message saying that javadir is not defined. Please refer to the attached snapshot. I really appreciate anyone who can help on this. =20 Thank you very much. =20 Best regards, Mei Yee - ------_=_NextPart_001_01C6EB37.60458FD1 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi = Ambrish,

Could you kindly be more specific = on the –root command below? For example, in which directory should I type = the –root command? I am currently doing it in = s2ibis3_v1_1/examples/ex1 directory, where buffer.s2i is located. Besides, I’m running this = in Linux using c-shell, hence I typed the = following:

= Source s2ibis3 –root ../../ -s2ibis3 = buffer.s2i

However, I get the message s2ibis3: No such file or = directory.

I also tried using this = command:

= s2ibis3 –root ../../ -s2ibis3 buffer.s2i

and I get: s2ibis3: Command not found

Kindly advice on how I should = proceed.

Thanks.

Best regards, =

Mei = Yee

From: = Ambrish Varma [mailto:akvarma@ncsu.edu]
Sent: Friday, October 06, = 2006 10:56 PM
To: NG,MEI-YEE; 'Mirmak, Michael'; ibis-users@eda.org
Subject: RE: [IBIS-Users] = S2IBIS3 V1_1

Hello Mei = Yee,

You need to use the = ‘-root’ option in your command to let java know where your classes are. Please refer to question C1 in the s2ibis3 FAQ page (http://www.= ece.ncsu.edu/erl/ibis/faq/S2IBIS3_FAQ.htm )

Thanks,

Ambrish.

--Ambrish = Varma

North = Carolina State = University

ph(919)513-2015, fax(919)515-2285

From: = NG,MEI-YEE = [mailto:mei-yee.ng@avagotech.com]
Sent: Friday, October 06, = 2006 5:04 AM
To: Ambrish Varma; = Mirmak, Michael; ibis-users@eda.org; ibis-info@eda.org
Subject: RE: [IBIS-Users] = S2IBIS3 V1_1

Hi = all,

Sorry to bombard you guys with = emails. But with reference to the below issue of undefined javadir, I added the line =

= Set javadir =3D “/opt/j2re1.4.2_12/bin/java” (as shown = by the screen shot)

Is this the right way to get around = it?

However, right now I get a = different error message : Exception in thread “main” java.lang.NoClassDefFoundError: s2ibis3 (as shown by the = attachment).

Kindly advice on this = issue.

Thank = you.

Best = regards,

Mei = Yee

From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] = On Behalf Of NG,MEI-YEE
Sent: Friday, October 06, = 2006 4:38 PM
To: Ambrish Varma; = Mirmak, Michael; ibis-users@server.eda.org; ibis-info@server.eda.org
Subject: [IBIS-Users] = S2IBIS3 V1_1

Hi = there,

I have downloaded and installed = Java 2 RE version 1.4.2_12 into my linux machine. I would like to run = s2ibis3’s examples, i.e. ex1. I read in the README file that I could try it out by = typing

= s2ibis3.csh –s2ibis3 buffer.s2i.

Since I’m using it in cshell, = I used a ‘source’ in front the command to run it. However, I always = get the error message saying that javadir is not defined. Please refer to = the attached snapshot. I really appreciate anyone who can help on = this.

Thank you very = much.

Best = regards,

Mei = Yee

- ------_=_NextPart_001_01C6EB37.60458FD1-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Mon, 9 Oct 2006 08:23:31 +0800 From: "NG,MEI-YEE" Subject: RE: [IBIS-Users] S2IBIS3 V1_1 This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6EB39.2639C6DF Content-Type: multipart/alternative; boundary="----_=_NextPart_002_01C6EB39.2639C6DF" - ------_=_NextPart_002_01C6EB39.2639C6DF Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi Ambrish, =20 I modified the previous command to source s2ibis3.csh -root ../../ - -s2ibis3 buffer.s2i and it started to run. However, it could not finish its run due to the following error: =20 Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: -1 =20 Please refer to attachment for s2ibis3.log. I am only running the ex1 in /examples without modifying anything. Kindly advice what could go wrong? =20 Thank you. =20 Best regards, Mei Yee =20 ________________________________ From: NG,MEI-YEE=20 Sent: Monday, October 09, 2006 8:11 AM To: NG,MEI-YEE; Ambrish Varma; 'Mirmak, Michael'; ibis-users@eda.org Subject: RE: [IBIS-Users] S2IBIS3 V1_1 =20 Hi Ambrish, =20 Could you kindly be more specific on the -root command below? For example, in which directory should I type the -root command? I am currently doing it in s2ibis3_v1_1/examples/ex1 directory, where buffer.s2i is located. Besides, I'm running this in Linux using c-shell, hence I typed the following: =20 Source s2ibis3 -root ../../ -s2ibis3 buffer.s2i =20 However, I get the message s2ibis3: No such file or directory. =20 I also tried using this command: s2ibis3 -root ../../ -s2ibis3 buffer.s2i =20 and I get: s2ibis3: Command not found =20 Kindly advice on how I should proceed. =20 Thanks. =20 Best regards,=20 Mei Yee =20 ________________________________ From: Ambrish Varma [mailto:akvarma@ncsu.edu]=20 Sent: Friday, October 06, 2006 10:56 PM To: NG,MEI-YEE; 'Mirmak, Michael'; ibis-users@eda.org Subject: RE: [IBIS-Users] S2IBIS3 V1_1 =20 Hello Mei Yee, You need to use the '-root' option in your command to let java know where your classes are. Please refer to question C1 in the s2ibis3 FAQ page (http://www.ece.ncsu.edu/erl/ibis/faq/S2IBIS3_FAQ.htm ) Thanks, Ambrish. =20 - --Ambrish Varma North Carolina State University ph(919)513-2015, fax(919)515-2285 ________________________________ From: NG,MEI-YEE [mailto:mei-yee.ng@avagotech.com]=20 Sent: Friday, October 06, 2006 5:04 AM To: Ambrish Varma; Mirmak, Michael; ibis-users@eda.org; ibis-info@eda.org Subject: RE: [IBIS-Users] S2IBIS3 V1_1 =20 Hi all, =20 Sorry to bombard you guys with emails. But with reference to the below issue of undefined javadir, I added the line=20 Set javadir =3D "/opt/j2re1.4.2_12/bin/java" (as shown by = the screen shot) Is this the right way to get around it? =20 However, right now I get a different error message : Exception in thread "main" java.lang.NoClassDefFoundError: s2ibis3 (as shown by the attachment). =20 Kindly advice on this issue. =20 Thank you. Best regards, Mei Yee =20 ________________________________ From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of NG,MEI-YEE Sent: Friday, October 06, 2006 4:38 PM To: Ambrish Varma; Mirmak, Michael; ibis-users@server.eda.org; ibis-info@server.eda.org Subject: [IBIS-Users] S2IBIS3 V1_1 =20 Hi there, =20 I have downloaded and installed Java 2 RE version 1.4.2_12 into my linux machine. I would like to run s2ibis3's examples, i.e. ex1. I read in the README file that I could try it out by typing=20 s2ibis3.csh -s2ibis3 buffer.s2i. =20 Since I'm using it in cshell, I used a 'source' in front the command to run it. However, I always get the error message saying that javadir is not defined. Please refer to the attached snapshot. I really appreciate anyone who can help on this. =20 Thank you very much. =20 Best regards, Mei Yee - ------_=_NextPart_002_01C6EB39.2639C6DF Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi = Ambrish,

I modified the previous command to = source s2ibis3.csh –root ../../ -s2ibis3 buffer.s2i and it started to = run. However, it could not finish its run due to the following = error:

= Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: = - -1

Please refer to attachment for s2ibis3.log. I am only running the ex1 in /examples without modifying = anything. Kindly advice what could go wrong?

Thank = you.

Best = regards,

Mei = Yee

From: = NG,MEI-YEE
Sent: Monday, October 09, = 2006 8:11 AM
To: NG,MEI-YEE; Ambrish Varma; 'Mirmak, Michael'; ibis-users@eda.org
Subject: RE: [IBIS-Users] = S2IBIS3 V1_1

Hi = Ambrish,

= Source s2ibis3 –root ../../ -s2ibis3 = buffer.s2i

However, I get the message s2ibis3: No such file or = directory.

I also tried using this = command:

= s2ibis3 –root ../../ -s2ibis3 = buffer.s2i

and I get: s2ibis3: Command not found

Kindly advice on how I should = proceed.

Thanks.

Best regards, =

Mei = Yee

Hello Mei = Yee,

You need to use the = ‘-root’ option in your command to let java know where your classes are. Please = refer to question C1 in the s2ibis3 FAQ page (http://www.= ece.ncsu.edu/erl/ibis/faq/S2IBIS3_FAQ.htm )

Thanks,

Ambrish.

--Ambrish = Varma

North = Carolina State = University

ph(919)513-2015, fax(919)515-2285

Hi = all,

Sorry to bombard you guys with = emails. But with reference to the below issue of undefined javadir, I added the line =

= Set javadir =3D “/opt/j2re1.4.2_12/bin/java” (as shown = by the screen shot)

Is this the right way to get around = it?

However, right now I get a = different error message : Exception in thread “main” = java.lang.NoClassDefFoundError: s2ibis3 (as shown by the attachment).

Kindly advice on this = issue.

Thank = you.

Best = regards,

Mei = Yee

Hi = there,

I have downloaded and installed = Java 2 RE version 1.4.2_12 into my linux machine. I would like to run = s2ibis3’s examples, i.e. ex1. I read in the README file that I could try it out by = typing

= s2ibis3.csh –s2ibis3 buffer.s2i.

Since I’m using it in cshell, = I used a ‘source’ in front the command to run it. However, I always = get the error message saying that javadir is not defined. Please refer to the = attached snapshot. I really appreciate anyone who can help on = this.

Thank you very = much.

Best = regards,

Mei = Yee

- ------_=_NextPart_002_01C6EB39.2639C6DF-- - ------_=_NextPart_001_01C6EB39.2639C6DF Content-Type: application/octet-stream; name="s2ibis3.log" Content-Transfer-Encoding: base64 Content-Description: s2ibis3.log Content-Disposition: attachment; filename="s2ibis3.log" czJpYmlzMyB2MS4xIC0tIE5vcnRoIENhcm9saW5hIFN0YXRlIFVuaXZlcnNpdHkKClRoaXMgRmls ZSBOYW1lID0gYnVmZmVyLmlicwpEYXRlID0gTW9uZGF5IE9jdCA5IDIwMDYgMDg6MTE6NTkgTVlU ClBpbiB2ZGQgbm90IGluIFNlcmllcyBQaW4gTWFwClBpbiBnbmQgbm90IGluIFNlcmllcyBQaW4g TWFwClBpbiBpbiBub3QgaW4gU2VyaWVzIFBpbiBNYXAKUGluIG91dCBub3QgaW4gU2VyaWVzIFBp biBNYXAKCgoKKysrKwpBbmFseXppbmcgY29tcG9uZW50IE1DTSBEcml2ZXIgMQoKQW5hbHl6aW5n IHBpbiAndmRkJwptb2RlbE5hbWUgZm9yIGFib3ZlIHBpbiBQT1dFUgoKQW5hbHl6aW5nIHBpbiAn Z25kJwptb2RlbE5hbWUgZm9yIGFib3ZlIHBpbiBHTkQKCkFuYWx5emluZyBwaW4gJ2luJwptb2Rl bE5hbWUgZm9yIGFib3ZlIHBpbiBkdW1teQpUSElTX1BJTl9ORUVEU19BTkFMWVNJUwpQb3dlciBw aW4gZm9yIGNvbXBvbmVudCBhdmFpbGFibGUuIFByb2NlZWRpbmcgZnVydGhlciAuLgpHTkQgcGlu IGZvciBjb21wb25lbnQgYXZhaWxhYmxlLiBQcm9jZWVkaW5nIGZ1cnRoZXIgLi4Kc3RhcnQgYW5h bHl6aW5nIHBpbiAuLiBpbgoKQW5hbHl6aW5nIHBpbiAnb3V0Jwptb2RlbE5hbWUgZm9yIGFib3Zl IHBpbiBkcml2ZXIKVEhJU19QSU5fTkVFRFNfQU5BTFlTSVMKUG93ZXIgcGluIGZvciBjb21wb25l bnQgYXZhaWxhYmxlLiBQcm9jZWVkaW5nIGZ1cnRoZXIgLi4KR05EIHBpbiBmb3IgY29tcG9uZW50 IGF2YWlsYWJsZS4gUHJvY2VlZGluZyBmdXJ0aGVyIC4uCnN0YXJ0IGFuYWx5emluZyBwaW4gLi4g b3V0CgpUaGlzIE1vZGVsIE5lZWRzIFB1bGx1cERhdGEgLi4KQ3VycmVudFBpbiBpcyAuLiBvdXQK RG8gdGhlIFRZUCBydW4gaW4gR2VuZXJhdGVWSVRhYmxlIApTdGFydGluZyBTcGVjdHJlIGpvYiB3 aXRoIGlucHV0IHB1dG91dC5zcGkKRXhjZXB0aW9uIHdoaWxlIGNvbGxlY3Rpbmcgc3BpY2UgZGF0 YSBmcm9tIG91dCBmaWxlcyAoZ2V0U3BpY2VWSURhdGEpOiBqYXZhLnV0aWwuTm9TdWNoRWxlbWVu dEV4Y2VwdGlvbgpEbyB0aGUgbWluIHJ1biBpbiBHZW5lcmF0ZVZJVGFibGUgClN0YXJ0aW5nIFNw ZWN0cmUgam9iIHdpdGggaW5wdXQgcHVub3V0LnNwaQpFeGNlcHRpb24gd2hpbGUgY29sbGVjdGlu ZyBzcGljZSBkYXRhIGZyb20gb3V0IGZpbGVzIChnZXRTcGljZVZJRGF0YSk6IGphdmEudXRpbC5O b1N1Y2hFbGVtZW50RXhjZXB0aW9uCkRvIHRoZSBtYXggcnVuIGluIEdlbmVyYXRlVklUYWJsZSAK U3RhcnRpbmcgU3BlY3RyZSBqb2Igd2l0aCBpbnB1dCBwdXhvdXQuc3BpCkV4Y2VwdGlvbiB3aGls ZSBjb2xsZWN0aW5nIHNwaWNlIGRhdGEgZnJvbSBvdXQgZmlsZXMgKGdldFNwaWNlVklEYXRhKTog amF2YS51dGlsLk5vU3VjaEVsZW1lbnRFeGNlcHRpb24KVGhpcyBNb2RlbCBOZWVkcyBQdWxsZG93 bkRhdGEgLi4KQ3VycmVudFBpbiBpcyAuLiBvdXQKRG8gdGhlIFRZUCBydW4gaW4gR2VuZXJhdGVW SVRhYmxlIApTdGFydGluZyBTcGVjdHJlIGpvYiB3aXRoIGlucHV0IHBkdG91dC5zcGkKRXhjZXB0 aW9uIHdoaWxlIGNvbGxlY3Rpbmcgc3BpY2UgZGF0YSBmcm9tIG91dCBmaWxlcyAoZ2V0U3BpY2VW SURhdGEpOiBqYXZhLnV0aWwuTm9TdWNoRWxlbWVudEV4Y2VwdGlvbgpEbyB0aGUgbWluIHJ1biBp biBHZW5lcmF0ZVZJVGFibGUgClN0YXJ0aW5nIFNwZWN0cmUgam9iIHdpdGggaW5wdXQgcGRub3V0 LnNwaQpFeGNlcHRpb24gd2hpbGUgY29sbGVjdGluZyBzcGljZSBkYXRhIGZyb20gb3V0IGZpbGVz IChnZXRTcGljZVZJRGF0YSk6IGphdmEudXRpbC5Ob1N1Y2hFbGVtZW50RXhjZXB0aW9uCkRvIHRo ZSBtYXggcnVuIGluIEdlbmVyYXRlVklUYWJsZSAKU3RhcnRpbmcgU3BlY3RyZSBqb2Igd2l0aCBp bnB1dCBwZHhvdXQuc3BpCkV4Y2VwdGlvbiB3aGlsZSBjb2xsZWN0aW5nIHNwaWNlIGRhdGEgZnJv bSBvdXQgZmlsZXMgKGdldFNwaWNlVklEYXRhKTogamF2YS51dGlsLk5vU3VjaEVsZW1lbnRFeGNl cHRpb24KCiBudW1UYWJsZVB0cyA6MTAwCgogcHVsbHVwRGF0YV9wLnNpemUgOjAKRXhjZXB0aW9u IGluIHRocmVhZCAibWFpbiIgamF2YS5sYW5nLkFycmF5SW5kZXhPdXRPZkJvdW5kc0V4Y2VwdGlv bjogLTEKCWF0IHNvcnRWSURhdGEuc29ydFZJRGF0YShzMmlhbmFseXouamF2YTo2MDUpCglhdCBh bmFseXplUGluLmFuYWx5emVQaW4oczJpYW5hbHl6LmphdmE6MTI3MykKCWF0IGFuYWx5emVDb21w b25lbnQuYW5hbHl6ZUNvbXBvbmVudChzMmlhbmFseXouamF2YToxNDU5KQoJYXQgczJpYmlzMy5t YWluKHMyaWJpczMuamF2YToxMDIpCg== - ------_=_NextPart_001_01C6EB39.2639C6DF-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Mon, 09 Oct 2006 07:07:35 -0700 From: Bob Ross Subject: [IBIS-Users] Asian IBIS Summit (China) - Sixth Announcement To All: The IBIS Open Forum is holding an Asian IBIS Summit Meeting in Shanghai, China, a major technology center on Friday, October 27. This is the sixth announcement for participation only. The program is shown below with speakers from China, Japan and the USA. Several companies listed below are co-sponsoring this large event to be held at the luxurious Radisson Hotel Shanghai New World. Like last year, we are planning for about 150 - 200 attendees including several IBIS experts from the USA. Note, we are also planning a Summit in Tokyo, Japan on October 31, announced separately. You may want to consider this in your travel plans. Bob Ross Teraspeed Consulting Group Lance Wang Cadence Design Systems - ----------------------------------------------------------------------- ASIAN IBIS SUMMIT (CHINA) SIXTH CALL FOR PARTICIPATION ONLY - ----------------------------------------------------------------------- http://www.eda-stds.org/pub/ibis/summits/oct06a/announcement_chinese.pdf ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A S I A N I B I S S U M M I T ( C H I N A ) Time/Date: Friday October 27, 2006, 8:00 AM to 5:30 PM Meeting starts at 9:00 AM Location: Radisson Hotel Shanghai New World 88 Nanjing Road (W) Shanghai 200003 CHINA Tel: + 86-21-63599999 Fax: + 86-21-63589705 E-mail newworld@radisson-nw.com http://www.radisson.com/shanghaicn_newworld Content: Presentations and Discussions Purpose: Solicit and exchange IBIS and interconnect model related information and ideas. Primary Sponsor: Huawei Technologies Co-sponsors (in alphabetical order): Ansoft Corporation, Cadence Design Systems, Intel Corporation, Mentor Graphics Corporation, Signal Integrity Software (SiSoft), Sigrity, and Synopsys. Cost: FREE, including refreshments and buffet lunch Vendors: Some vendors will have information tables outside the meeting room BACKGROUND Last December we held a successful meeting in Shenzhen. This year we are moving to Shanghai another special economic zone in the Peoples Republic of China with many high technology companies and many development and sales offices of foreign companies. Many sites of interest are near the conference hotel. Our objective is to reach out internationally to communicate with the local experts and to learn of regional concerns. CONFERENCE LANGUAGE The conference language is English, but we will plan for technical translations in English and Chinese. So presenters can optionally deliver in Chinese as long as an English version of the material is available. IBIS SUMMIT This meeting will be conducted as a formal IBIS Summit Meeting. Presentations will be archived in an electronic format on our Summits site, and minutes of the meeting will be issued. However, no formal decisions requiring votes will be planned. CALL FOR PARTICIPANTS People involved in IBIS and interconnect model development, EDA tool development, and digital circuit design are invited to participate to the Summit meeting. If you plan to participate, please register using the information below: Name: E-mail address: Company: Top-level Web Link: Country: Telephone: Comments: (Such as assistance for the travel requirements at the end) Send to BOTH: Bob Ross, Teraspeed Consulting Group bob@teraspeed.com Lance Wang, Cadence Design Systems lwang@cadence.com SIGNUP DEADLINE: October 20, 2006 CALL FOR PRESENTATIONS - CLOSED, OUR PROGRAM IS FULL AGENDA Currently we are planning presentations from the following companies: CHINA Fiberhome Telecomminications Technology, Huawei Technologies, and ZTE Corporation JAPAN Cybernet Systems, Japan Aviation Electronics, JEITA, and NEC Electronics USA Ansoft, Cadence Design Systems, Intel Corporation, Mentor Graphics Corporation, Signal Integrity Software (SiSoft), Sigrity, and Teraspeed Consulting Group - ----------------------------------------------------------------- I B I S S U M M I T M E E T I N G A G E N D A 8:15 REFRESHMENTS & SIGN IN - Vendor Tables Open 9:00 Introductions and Program Overview - Welcome, Jiang, XiangZhong, (Huawei Technologies, China) - Welcome to Summit, Mirmak, Michael (Intel Corporation, USA) - Welcoming Comments, Invited Chinese Leader/Speaker (China) 9:30 The Direction of IBIS as a Standard Mirmak, Michael (Intel Corporation, USA) 9:45 IBIS Model Validation Report Zheng, Qi (Fiberhome Telecommunications Technology, China) 10:15 BREAK (Refreshments) 10:30 IBIS Model Engineering for SI Analysis Kusunoki, Kazuhiko (Cybernet Systems, Japan) 11:00 Case Study: Spice Macromodeling for PCI Express Using IBIS 4.2 Wang, Lance (Cadence Design Systems) 11:30 System-Level Timing Closure Using IBIS Models Katz, Barry (Signal Integrity Software (SiSoft), USA) 12:00 FREE BUFFET LUNCH (Hosted by Sponsors) - Vendor Tables 12:00 - 12:45 Press Conference for IBIS Officers and Sponsors 13:30 Statistical Eye Simulation Requirements Huang, ChunXing (Huawei Technologies, China) 14:00 Methodologies for Multi-Gigabit Interconnect Design Byers, Andy, and Williams, Lawrence (Ansoft Corporation, USA) 14:30 System-Level SSO Simulation Techniques with Various IBIS Package Models Chitwood, Sam*, Lin, Jack, W.C.**, and Chen, Raymond Y.* (Sigrity, *USA and **China) 15:00 Using S-parameters for Behavioral Interconnect Modeling Zhu, ShunLin (ZTE Corporation, China) 15:30 BREAK (Refreshments) 15:45 JEITA EDA - WG Activity and Study of Interconnect Model Part-3 Watanabe, Takeshi*, Ikeda, Hiroaki**, and JEITA (*NEC Electronics, **Japan Aviation Electronics, Japan) 16:15 IBIS 4.2 and VHDL-AMS for Serdes and DDR2 Analysis Dodd, Ian and Pratt, Gary (Mentor Graphics Corporation, USA) 16:45 IBIS Modeling of DDR2 in Conjunction with Linear Channel Analysis Dodd, Ian (Mentor Graphics Corporation, USA) 17:05 ODT, Pre-Emphasis, and Speed Ross, Bob (Teraspeed Consulting Group, USA) 17:20 Concluding Items 17:30 END OF IBIS SUMMIT MEETING - Final Vendor Tables and Teardown - ------------------------------------------------------------------ LIST OF NEARBY HOTELS AND TRAVEL RULES Hotels in all price ranges can be found through internet searches. A link to the Radisson Hotel Shanghai New World is: http://www.radisson.com/shanghaicn_newworld Comply with your travel rules, such as indicated in the link below to China and Shanghai. Work with your travel agent. Notify us as a sign-up comment if you need assistance. Visas, if needed, should fall in the visit/business category: http://www.travelchinaguide.com/embassy/visa.htm - ----------------------------------------------------------------- - -- Bob Ross Teraspeed Consulting Group LLC Teraspeed Labs 121 North River Drive 13610 SW Harness Lane Narragansett, RI 02882 Beaverton, OR 97008 401-284-1827 503-430-1065 http://www.teraspeed.com 503-246-8048 Direct bob@teraspeed.com Teraspeed is a registered service mark of Teraspeed Consulting Group LLC - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Tue, 10 Oct 2006 11:12:21 +0900 From: "Ryohei Kato" Subject: [IBIS-Users] RE: BOUNCE ibis-users@eda.org: Non-member submission from ["Ryohei Kato" ] Hello Michael, Thank you for your reply and adding me to the mailing list!!! Q1: >So, I would not expect traditional IBIS results to change if you alter the tool temperature setting. If you use IBIS 4.1 or 4.2 with Verilog-A or AMS code, and that code relies on temperature, you should see some effect, however. Do you have a sample of IBIS 4.1 or 4.2 with Verilog-A or AMS code which has temperature characteristic? If yes, could you send me it? If no, can I get it from the semiconductor vender? (Most IBIS models on Web are IBIS 2.* or 3.*. ) I would like to confirm the temperature characteristic of I/O buffer by simulation. Q2: I understood your answer. Q3: I have another question. In IBIS FAQ, IBIS model can perform the SSO analysis. http://www.eigroup.org/ibis/faq.htm#a6 I think that it is difficult to express the current of power node in IBIS model. Ex; I(power_clump), I(ground_clump) Can IBIS model express it? If yes, Which version of IBIS model can I do it? Which keyword of IBIS model is necessary? Is there a sample material of SSO analysis? Regards, Ryohei Kato - -----Original Message----- From: Mirmak, Michael [mailto:michael.mirmak@intel.com] Sent: Saturday, October 07, 2006 2:38 AM To: ryohei.kato@synopsys.COM Subject: RE: BOUNCE ibis-users@eda.org: Non-member submission from ["Ryohei Kato" ] Kato san, Thank you for your interest in IBIS! As you are not a subscriber to the mailing list, the reflector did not receive your message. We will add you to the list shortly. To answer your questions: 1) Traditional IBIS (meaning, IBIS that uses table data instead of AMS) is a "snapshot" of the behavior of a buffer under the named conditions. In other words, the voltage and temperature parameters describe what the part's state was when the I-V, V-t and C_comp data was extracted. No relationship is specified between the tables and the temperature or voltage; if the tool using the IBIS data does not interpolate a relationship, then changing simulation temperatures will not change the buffer's behavior. So, I would not expect traditional IBIS results to change if you alter the tool temperature setting. If you use IBIS 4.1 or 4.2 with Verilog-A or AMS code, and that code relies on temperature, you should see some effect, however. 2) This is determined by the tool; the IBIS model/file does not control the usage of the data. In the case of Synopsys HSPICE (which I assume you are using, from your e-mail address!), the "typ=xxx" line under the B-element would affect the buffer corner and therefore which tables are used. I hope this helps! Please consult the IBIS Cookbook for further details: http://www.eda-stds.org/ibis/cookbook/cookbook-v4.pdf - - Michael Mirmak Intel Corp. Chair, EIA IBIS Open Forum - -----Original Message----- Hello experts, I'm Ryohei Kato. I have a question about the IBIS model. Q1: Does the IBIS model have a temperature characteristic? When I analyze the IBIS model using HSPICE, I set the temperature sweep. (".temp 0 50 100") But all the simulation results became the same. If the IBIS model doesn't have it, for what is the property of "Temperature Range" used? Q2: The property of "PULLdown", "PULLup", etc... have the typical, max, and min column. How can I switch these in simulation? Please tell me the solution. Regards, Ryohei Kato - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Thu, 12 Oct 2006 22:01:44 -0700 From: "Mirmak, Michael" Subject: [IBIS-Users] Asian IBIS Summit (Japan) - Fifth Announcement The IBIS Open Forum is holding the first Asian IBIS Summit (Japan) Meeting in Tokyo, Japan, where several major companies have design operations and use IBIS. A complete agenda and schedule will be distributed one week before the summit date. JEITA (Japan Electronics and Information Technology Industries Association) is the primary event sponsor with several companies, listed below, acting as co-sponsors. The event will held at JEITA headquarters in Tokyo. Several US experts are expected to participate. Note that we are also holding a Summit in Shanghai, China on October 27, announced separately. You may want to consider this in your travel plans. Michael Mirmak Intel Corporation Takeshi Watanabe NEC Electronics Corporation - ----------------------------------------------------------------------- ASIAN IBIS SUMMIT (JAPAN) CALL FOR PARTICIPATION AND PRESENTATIONS - ----------------------------------------------------------------------- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ A S I A N I B I S S U M M I T ( J A P A N ) Time/Date: Tuesday October 31, 2006, 8:30 AM to 3:00 PM Meeting starts at 9:00 AM Location: JEITA Headquarters 3rd Fl., Mitsui Sumitomo Kaijo Bldg. Annex 11, Kanda Surugadai 3-chome, Chiyoda-ku, Tokyo 101-0062 JAPAN http://www.jeita.or.jp/english/about/location/index.htm Content: Presentations and Discussions Purpose: Solicit and Exchange IBIS Model Related Information and Ideas. Organizational Sponsors: Japan Electronics and Information Technology Industries Association (JEITA) EIA IBIS Open Forum Co-sponsors (in alphabetical order): ATE Service Corporation (Sigrity) Cadence Design Systems Cybernet Systems (formerly KAW) Mentor Graphics Synopsys Cost: FREE, including refreshments and lunch Contact us for details regarding sponsorship BACKGROUND This year we holding the first open Asian IBIS Summit (Japan) meeting. Major Japanese companies operate in Tokyo and are affiliated with JEITA and IBIS. Our objective is to reach out internationally to communicate with the local experts and to learn of regional concerns. CONFERENCE LANGUAGE The conference language is English, but we will plan for technical translations in English and Japanese. Presenters may optionally deliver in Japanese as long as an English version of the material is available. IBIS SUMMIT This meeting will be conducted as a formal IBIS Summit Meeting. Presentations will be archived in an electronic format on our Summit site and minutes of the meeting will be issued. However, no formal decisions requiring votes will be planned. CALL FOR PARTICIPANTS People involved in IBIS model development, EDA tool development, and digital circuit design are invited to participate to the Summit meeting. If you plan to participate, please register with the information below: Name: E-mail address: Company: Top-level Web Link: Country: Telephone: Send to BOTH: Bob Ross, Teraspeed Consulting Group bob@teraspeed.com Takeshi Watanabe, NEC Electronics Corp. takeshi.watanabe@necel.com SIGNUP DEADLINE: October 20, 2006 Because of limited space, advance registration is required. CALL FOR PRESENTATIONS We are seeking presentations from individuals who have IBIS experiences or issues. If we have to select presentations for the number of time slots available, we will give preferential consideration to presentations from Asia. Presentation Format: LCD Projection from meeting laptop computer Time: 15-30 Minutes including questions Electronic Archival: All presentations will uploaded to our public IBIS Summit archives Electronic Format: Microsoft PowerPoint or Adobe PDF Presentation Copies: Available at the meeting for all attendees Presentation Deadline: October 20, 2006 to produce the presentation copies for the meeting If you plan a presentation, please ADD to the above registration information: Title of Presentation: Estimated Time: (30 minutes or less) We will notify you of acceptance and may follow up with questions when we form the program agenda. Note: Vendor promotional or business information is prohibited. Submitted presentations must be in English, although the delivery can be in either Japanese or English. Submissions from Asian are encouraged. AGENDA 8:30 - 9:00 Sign in Asian IBIS Summit (Japan) 9:00 - 12:00 Presentations 12:00 - 12:40 Free lunch 12:40 - 15:00 Presentations 15:00 End of Meeting =20 The specific agenda is being developed. We expect seven or eight presentations covering a range of issues from existing customer experiences, existing clarifications and some of the future directions in IBIS to deal with technical advances. Several major IBIS Committee presentations from IBIS officers or active members are planned Several presentations on IBIS applications or modeling issues are expected from co-sponsor companies or their customers. LIST OF NEARBY HOTELS AND TRAVEL RULES Hotels in all price ranges can be found through internet searches. JEITA suggests the Tokyo Dome Hotel as convenient accommodation. JEITA headquarters is located near several train stations (click image): http://www.jeita.or.jp/english/about/location/index.htm - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Mon, 16 Oct 2006 12:07:14 -0700 From: "Mirmak, Michael" Subject: [IBIS-Users] Updated ICM parser - version 1.1.2 The IBIS Open Forum is pleased to announce the availability of ICMCHK1, version 1.1.2. This update addresses BUG reports 1, 2 and 3. Thanks to Kelly Green for his assistance in updating the code. ICMCHK1 is the official parser for files created using the IBIS Interconnect Modeling (ICM) specification. ICM provides a non-proprietary way to represent the electrical behavior of interconnects, applicable to packages, cables, connectors and similar structures. Data for models under ICM may be included in frequency-dependent (tabular) RLGC matrices or through links to external S-parameter files. ICM is standardized as GEIA-STD-0001 and support for ICM in commercial SI tools is growing steadily. Executables for the new version of the parser are available free of charge at the following URL: http://www.eda-stds.org/ibis/icmchk1/. Note that the source code is available for purchase under license agreement. Please contact the IBIS Open Forum if you are interested in obtaining a source code license. - - Michael Mirmak Intel Corp. Chair, EIA IBIS Open Forum http://www.eigroup.org/ibis/ http://www.eda-stds.org/ibis/ - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 11:44:01 +0800 From: "NG,MEI-YEE" Subject: [IBIS-Users] Ground Clamp Reference This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6F267.A6CD909E Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi all, =20 I used s2ibis3 to simulate my Input pad and I realized that the sweep range for Ground Clamp curves are from -Vcc to Vcc, where Vcc is the the value for typical. However, this range remains the same figure for ALL corners i.e. fast, slow and typical. This means that if my Vcc is 3V, the sweep range for all the corners is -3 to 3V, regardless of my Vcc at various corners. =20 Is this the standard for Ground clamp? I tried using the keyword [GND clamp reference] 2.7 3 3.3 but the range still remains -3 to 3V. =20 Kindly advice. =20 Thank you. =20 Best regards,=20 Mei Yee - ------_=_NextPart_001_01C6F267.A6CD909E Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi all,

I used s2ibis3 to simulate my Input pad and I = realized that the sweep range for Ground Clamp curves are from –Vcc to Vcc, where = Vcc is the the value for typical. However, this range remains the same figure = for ALL corners i.e. fast, slow and typical. This means that if my Vcc is 3V, = the sweep range for all the corners is -3 to 3V, regardless of my Vcc at various = corners.

Is this the standard for Ground clamp? I tried using = the keyword [GND clamp reference] 2.7 3 3.3 but the range still remains -3 = to 3V.

Kindly advice.

Thank you.

Best regards,

Mei Yee

Hi all,

Is this the standard for Ground clamp? I tried using = the keyword [GND clamp reference] 2.7 3 3.3 but the range still remains -3 = to 3V.

Kindly advice.

Thank you.

Best regards,

Mei Yee

- ------_=_NextPart_001_01C6F267.A6CD909E-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Tue, 17 Oct 2006 22:50:30 -0700 From: "Lynne D. Green" Subject: RE: [IBIS-Users] Ground Clamp Reference Hello, Mei Yee, Yes, this is standard for all of the I-V tables. It is highly recommended that all I-V tables should go from -Vcc to 2*Vcc in the completed IBIS model. More information can be found in the IBIS Cookbook. http://www.vhdl.org/pub/ibis/cookbook/cookbook-v4.pdf When you have completed a model, please feel free to send it to the IBIS Model Review Committee. http://www.eigroup.org/ibis/support.htm Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of NG,MEI-YEE Sent: Tuesday, October 17, 2006 8:44 PM To: ibis-users@eda.org; ibis-users@eda.org; Ambrish Varma; Mirmak, Michael Subject: [IBIS-Users] Ground Clamp Reference Hi all, I used s2ibis3 to simulate my Input pad and I realized that the sweep range for Ground Clamp curves are from -Vcc to Vcc, where Vcc is the the value for typical. However, this range remains the same figure for ALL corners i.e. fast, slow and typical. This means that if my Vcc is 3V, the sweep range for all the corners is -3 to 3V, regardless of my Vcc at various corners. Is this the standard for Ground clamp? I tried using the keyword [GND clamp reference] 2.7 3 3.3 but the range still remains -3 to 3V. Kindly advice. Thank you. Best regards, Mei Yee - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 13:59:29 +0800 From: "NG,MEI-YEE" Subject: RE: [IBIS-Users] Ground Clamp Reference Hi Lynne, I understand that the range -Vcc to Vcc is the IBIS standard for Ground Clamp curve, however, does the range change according to the min and max simulation? For example, in min, my Vcc will be lower hence, the range - -Vcc to Vcc will be different from the range for typical simulation, is that right? Same case for max, my Vcc will be higher, so does my simulation range change according to the max Vcc as well? Thanks. Best regards, Mei Yee - -----Original Message----- From: Lynne D. Green [mailto:lgreen22@mindspring.com] Sent: Wednesday, October 18, 2006 1:51 PM To: NG,MEI-YEE; ibis-users@eda.org; ibis-users@eda.org; 'Ambrish Varma'; 'Mirmak, Michael' Subject: RE: [IBIS-Users] Ground Clamp Reference Hello, Mei Yee, Yes, this is standard for all of the I-V tables. It is highly recommended that all I-V tables should go from -Vcc to 2*Vcc in the completed IBIS model. More information can be found in the IBIS Cookbook. http://www.vhdl.org/pub/ibis/cookbook/cookbook-v4.pdf When you have completed a model, please feel free to send it to the IBIS Model Review Committee. http://www.eigroup.org/ibis/support.htm Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of NG,MEI-YEE Sent: Tuesday, October 17, 2006 8:44 PM To: ibis-users@eda.org; ibis-users@eda.org; Ambrish Varma; Mirmak, Michael Subject: [IBIS-Users] Ground Clamp Reference Hi all, I used s2ibis3 to simulate my Input pad and I realized that the sweep range for Ground Clamp curves are from -Vcc to Vcc, where Vcc is the the value for typical. However, this range remains the same figure for ALL corners i.e. fast, slow and typical. This means that if my Vcc is 3V, the sweep range for all the corners is -3 to 3V, regardless of my Vcc at various corners. Is this the standard for Ground clamp? I tried using the keyword [GND clamp reference] 2.7 3 3.3 but the range still remains -3 to 3V. Kindly advice. Thank you. Best regards, Mei Yee - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 15:10:48 +0800 From: "NG,MEI-YEE" Subject: [IBIS-Users] C Comp parameter This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6F284.8A0BF38D Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi all, =20 I was looking through the way to extract C_comp parameter for IBIS models. It shows the method to find C_comp for an output buffer. How about an input buffer? Is C_comp still required and how is it extracted? =20 Appreciate your kind response. =20 Thank you. =20 Best regards, Mei Yee - ------_=_NextPart_001_01C6F284.8A0BF38D Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi all,

I was looking through the way to extract C_comp = parameter for IBIS models. It shows the method to find C_comp for an output = buffer. How about an input buffer? Is C_comp still required and how is it = extracted?

Appreciate your kind = response.

Thank you.

Best regards,

Mei Yee

- ------_=_NextPart_001_01C6F284.8A0BF38D-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 15:10:48 +0800 From: "NG,MEI-YEE" Subject: [IBIS-Users] C Comp parameter This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6F284.8A0BF38D Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Hi all, =20 I was looking through the way to extract C_comp parameter for IBIS models. It shows the method to find C_comp for an output buffer. How about an input buffer? Is C_comp still required and how is it extracted? =20 Appreciate your kind response. =20 Thank you. =20 Best regards, Mei Yee - ------_=_NextPart_001_01C6F284.8A0BF38D Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi all,

Appreciate your kind = response.

Thank you.

Best regards,

Mei Yee

- ------_=_NextPart_001_01C6F284.8A0BF38D-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 00:16:01 -0700 From: "Mirmak, Michael" Subject: RE: [IBIS-Users] C Comp parameter This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6F285.4131129C Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Mei Yee, =20 C_comp is certainly required for input buffers and is extracted in a highly similar fashion to that used for C_comp on output buffers. =20 =20 - - Michael Mirmak Intel Corp.=20 Chair, EIA IBIS Open Forum =20 =20 ________________________________ From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of NG,MEI-YEE Sent: Wednesday, October 18, 2006 00:11 To: ibis-users@server.eda.org; ibis-users@server.eda.org Subject: [IBIS-Users] C Comp parameter Hi all, =20 I was looking through the way to extract C_comp parameter for IBIS models. It shows the method to find C_comp for an output buffer. How about an input buffer? Is C_comp still required and how is it extracted? =20 Appreciate your kind response. =20 Thank you. =20 Best regards, Mei Yee - ------_=_NextPart_001_01C6F285.4131129C Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Mei Yee,

C_comp is certainly required for input buffers = and is=20 extracted in a highly similar fashion to that used for C_comp on output=20 buffers.

- Michael Mirmak

Intel Corp.

Chair, EIA IBIS Open = Forum

From:=20 owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] = On=20 Behalf Of NG,MEI-YEE
Sent: Wednesday, October 18, 2006=20 00:11
To: ibis-users@server.eda.org;=20 ibis-users@server.eda.org
Subject: [IBIS-Users] C Comp=20 parameter

Hi = all,

I was looking through the = way to=20 extract C_comp parameter for IBIS models. It shows the method to find = C_comp for=20 an output buffer. How about an input buffer? Is C_comp still required = and how is=20 it extracted?

Appreciate your kind=20 response.

Thank=20 you.

Best=20 regards,

Mei=20 Yee

- ------_=_NextPart_001_01C6F285.4131129C-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 18:23:41 +0530 From: "Anguraj.K" Subject: [IBIS-Users] Error message from IBIS parser. Hi IBIS Experts, A quick help! When do I get this ERROR message fron ibis parser (ibischk3)? The [Rising Waveform] with [R_fixture]=50 Ohms and [V_fixture_min]=1.71V has MIN column DC endpoints of 0.86V and 1.59v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.82V and 1.49V), a difference of 6.87% and 14.93%, respectively. Any input would be of great help! Thanks, Anguraj - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 15:04:11 +0200 From: Lars Snith Subject: Re: [IBIS-Users] Error message from IBIS parser. Hello Anguraj, I'm not an expert, but I have encountered this a few times. I usually try (either of) the following: 1) Run the simulation for a little bit longer 2) Increase R_fixture (or add another curve) Best regards, Lars Snith Anguraj.K wrote: > Hi IBIS Experts, > > A quick help! > > When do I get this ERROR message fron ibis parser (ibischk3)? > The [Rising Waveform] > with [R_fixture]=50 Ohms and [V_fixture_min]=1.71V > has MIN column DC endpoints of 0.86V and 1.59v, but > an equivalent load applied to the model's I-V tables yields > different voltages ( 0.82V and 1.49V), > a difference of 6.87% and 14.93%, respectively. > > Any input would be of great help! > > Thanks, > Anguraj - -- Those who can, Do Those who can't, Simulate - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 08:25:41 -0700 From: "Muranyi, Arpad" Subject: RE: [IBIS-Users] Ground Clamp Reference Mei, The IBIS specification doesn't spell out what to do to determine the sweep ranges of the min and max corners. It is OK to use the typical supply value for the sweep range in all corner cases. However, if you want to go out of your way, you can use the maximum value for all corners in determining the sweep range. It is up to you. You just have to make sure that you don't have any "NA" in the first and last position of the data tables. Arpad ======================================================= - -----Original Message----- From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of NG,MEI-YEE Sent: Tuesday, October 17, 2006 10:59 PM To: Lynne D. Green; ibis-users@server.eda.org; ibis-users@server.eda.org; Ambrish Varma; Mirmak, Michael Subject: RE: [IBIS-Users] Ground Clamp Reference Hi Lynne, I understand that the range -Vcc to Vcc is the IBIS standard for Ground Clamp curve, however, does the range change according to the min and max simulation? For example, in min, my Vcc will be lower hence, the range - -Vcc to Vcc will be different from the range for typical simulation, is that right? Same case for max, my Vcc will be higher, so does my simulation range change according to the max Vcc as well? Thanks. Best regards, Mei Yee - -----Original Message----- From: Lynne D. Green [mailto:lgreen22@mindspring.com] Sent: Wednesday, October 18, 2006 1:51 PM To: NG,MEI-YEE; ibis-users@eda.org; ibis-users@eda.org; 'Ambrish Varma'; 'Mirmak, Michael' Subject: RE: [IBIS-Users] Ground Clamp Reference Hello, Mei Yee, Yes, this is standard for all of the I-V tables. It is highly recommended that all I-V tables should go from -Vcc to 2*Vcc in the completed IBIS model. More information can be found in the IBIS Cookbook. http://www.vhdl.org/pub/ibis/cookbook/cookbook-v4.pdf When you have completed a model, please feel free to send it to the IBIS Model Review Committee. http://www.eigroup.org/ibis/support.htm Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of NG,MEI-YEE Sent: Tuesday, October 17, 2006 8:44 PM To: ibis-users@eda.org; ibis-users@eda.org; Ambrish Varma; Mirmak, Michael Subject: [IBIS-Users] Ground Clamp Reference Hi all, I used s2ibis3 to simulate my Input pad and I realized that the sweep range for Ground Clamp curves are from -Vcc to Vcc, where Vcc is the the value for typical. However, this range remains the same figure for ALL corners i.e. fast, slow and typical. This means that if my Vcc is 3V, the sweep range for all the corners is -3 to 3V, regardless of my Vcc at various corners. Is this the standard for Ground clamp? I tried using the keyword [GND clamp reference] 2.7 3 3.3 but the range still remains -3 to 3V. Kindly advice. Thank you. Best regards, Mei Yee - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 09:34:32 -0700 From: "Mirmak, Michael" Subject: RE: [IBIS-Users] Error message from IBIS parser. Anguraj and Lars, The error message results from a mismatch between your I-V tables and the "settled" starting and ending points of your V-t tables. The parser treats any mismatch between 2% and 10% as worthy of a warning. Mismatches greater than 10% will cause an error. Recall that the V-t tables should start and end at a voltage determined by the voltage division of the circuit containing R_fixture, V_fixture and the "on" resistance of your pullup or pulldown. Long before and long after transitions, your V-t tables should effectively be at DC. Therefore, you should be able to match these starting and ending DC V-t table values to the voltage-intercept of a load-line, with value of R_fixture, drawn across your I-V table. If the V-t start/end points and the load-line intercepts don't match, a warning or error will be issued. Running the simulation longer could help the issue at the *end* of the table, but may not help the mismatch at the beginning. I would not recommend changing the R_fixture of your model alone, unless you are generating new V-t tables using that new value. The process for matching is documented in the IBIS Cookbook: http://www.eda-stds.org/ibis/cookbook/cookbook-v4.pdf. Please consult this document for further detail. I would also suggest using the latest parser (ibischk4), to ensure that the error message is not the result of any previously-detected bug in ibischk3. Good luck! - - Michael Mirmak Intel Corp. Chair, EIA IBIS Open Forum - -----Original Message----- From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of Lars Snith Sent: Wednesday, October 18, 2006 06:04 To: Anguraj.K Cc: ibis-users@server.eda.org Subject: Re: [IBIS-Users] Error message from IBIS parser. Hello Anguraj, I'm not an expert, but I have encountered this a few times. I usually try (either of) the following: 1) Run the simulation for a little bit longer 2) Increase R_fixture (or add another curve) Best regards, Lars Snith Anguraj.K wrote: > Hi IBIS Experts, > > A quick help! > > When do I get this ERROR message fron ibis parser (ibischk3)? > The [Rising Waveform] > with [R_fixture]=50 Ohms and [V_fixture_min]=1.71V > has MIN column DC endpoints of 0.86V and 1.59v, but > an equivalent load applied to the model's I-V tables yields > different voltages ( 0.82V and 1.49V), > a difference of 6.87% and 14.93%, respectively. > > Any input would be of great help! > > Thanks, > Anguraj - -- Those who can, Do Those who can't, Simulate - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 18 Oct 2006 10:25:04 -0700 From: "Lynne D. Green" Subject: RE: [IBIS-Users] Ground Clamp Reference Sorry my answer was incomplete. The range stays the same for all 3 corners: TYP -Vcc to TYP 2*Vcc. - - Lynne - -----Original Message----- From: NG,MEI-YEE [mailto:mei-yee.ng@avagotech.com] Sent: Tuesday, October 17, 2006 10:59 PM To: Lynne D. Green; ibis-users@eda.org; ibis-users@eda.org; Ambrish Varma; Mirmak, Michael Subject: RE: [IBIS-Users] Ground Clamp Reference Hi Lynne, I understand that the range -Vcc to Vcc is the IBIS standard for Ground Clamp curve, however, does the range change according to the min and max simulation? For example, in min, my Vcc will be lower hence, the range -Vcc to Vcc will be different from the range for typical simulation, is that right? Same case for max, my Vcc will be higher, so does my simulation range change according to the max Vcc as well? Thanks. Best regards, Mei Yee - -----Original Message----- From: Lynne D. Green [mailto:lgreen22@mindspring.com] Sent: Wednesday, October 18, 2006 1:51 PM To: NG,MEI-YEE; ibis-users@eda.org; ibis-users@eda.org; 'Ambrish Varma'; 'Mirmak, Michael' Subject: RE: [IBIS-Users] Ground Clamp Reference Hello, Mei Yee, Yes, this is standard for all of the I-V tables. It is highly recommended that all I-V tables should go from -Vcc to 2*Vcc in the completed IBIS model. More information can be found in the IBIS Cookbook. http://www.vhdl.org/pub/ibis/cookbook/cookbook-v4.pdf When you have completed a model, please feel free to send it to the IBIS Model Review Committee. http://www.eigroup.org/ibis/support.htm Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of NG,MEI-YEE Sent: Tuesday, October 17, 2006 8:44 PM To: ibis-users@eda.org; ibis-users@eda.org; Ambrish Varma; Mirmak, Michael Subject: [IBIS-Users] Ground Clamp Reference Hi all, I used s2ibis3 to simulate my Input pad and I realized that the sweep range for Ground Clamp curves are from -Vcc to Vcc, where Vcc is the the value for typical. However, this range remains the same figure for ALL corners i.e. fast, slow and typical. This means that if my Vcc is 3V, the sweep range for all the corners is -3 to 3V, regardless of my Vcc at various corners. Is this the standard for Ground clamp? I tried using the keyword [GND clamp reference] 2.7 3 3.3 but the range still remains -3 to 3V. Kindly advice. Thank you. Best regards, Mei Yee - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Thu, 19 Oct 2006 17:40:15 -0700 From: Bob Ross Subject: [IBIS-Users] Agenda - Asian IBIS Summit (China) To Attendees: We are looking foward to seeing you next week. Please come early to sign in since many people are registered. Please bring a business card to serve as your meeting badge. Bob - ------------------------------------------------------------------ A S I A N I B I S S U M M I T I N F O R M A T I O N Time/Date: 8:15 - 17:30, Friday October 27, 2006 Location: Radisson Hotel Shanghai New World 88 Nanjing Road (W) Shanghai 200003 CHINA Tel: + 86-21-63599999 Fax: + 86-21-63589705 E-mail newworld@radisson-nw.com Room: Check Hotel Meeting Listing Sponsors: Huawei Technologies (Primary) Ansoft, Cadence Design Systems, Intel Corporation Mentor Graphics Corporation, Signal Integrity Software (SiSoft), Sigrity, and Synopsys - ------------------------------------------------------------------ I B I S S U M M I T M E E T I N G A G E N D A 8:15 REFRESHMENTS & SIGN IN - Vendor Tables Open 9:00 Welcome and Keynote Comments - Jiang, XiangZhong (Huawei Technologies, China) - Mirmak, Michael (Chair., EIA IBIS Open Forum, Intel Corporation, USA) - Xu, ShaoMin (Chairman and Managing Director, Shanghai Government Information Technology Committee, China) 9:30 The Direction of IBIS as a Standard Mirmak, Michael (Intel Corporation, USA) 9:45 IBIS Model Validation Report Zheng, Qi (Fiberhome Telecommunications Technology, China) 10:15 BREAK (Refreshments) 10:30 IBIS Model Engineering for SI Analysis Kusunoki, Kazuhiko (Cybernet Systems, Japan) 11:00 Case Study: Spice Macromodeling for PCI Express Using IBIS 4.2 Wang, Lance (Cadence Design Systems, USA) 11:30 System-Level Timing Closure Using IBIS Models Katz, Barry (Signal Integrity Software (SiSoft), USA) 12:00 FREE BUFFET LUNCH (Hosted by Sponsors) - Vendor Tables - Press Luncheon for IBIS Officers and Sponsors 13:30 Statistical Eye Simulation Requirements Huang, ChunXing (Huawei Technologies, China) 14:00 Methodologies for Multi-Gigabit Interconnect Design Byers, Andy, and Williams, Lawrence (Ansoft Corporation, USA) 14:30 System-Level SSO Simulation Techniques with Various IBIS Package Models Chitwood, Sam*, Lin, Jack, W.C.**, and Chen, Raymond Y.* (Sigrity, *USA and **China) 15:00 Using S-parameters for Behavioral Interconnect Modeling Zhu, ShunLin (ZTE Corporation, China) 15:30 BREAK (Refreshments) 15:45 JEITA EDA - WG Activity and Study of Interconnect Model Part-3 Watanabe, Takeshi*, Ikeda, Hiroaki**, and JEITA (*NEC Electronics, **Japan Aviation Electronics, Japan) 16:15 IBIS 4.2 and VHDL-AMS for Serdes and DDR2 Analysis Dodd, Ian and Pratt, Gary (Mentor Graphics Corporation, USA) 16:45 IBIS Modeling of DDR2 in Conjunction with Linear Channel Analysis Dodd, Ian (Mentor Graphics Corporation, USA) 17:05 ODT, Pre-Emphasis, and Speed Ross, Bob (Teraspeed Consulting Group, USA) 17:20 Concluding Items 17:30 END OF IBIS SUMMIT MEETING - Final Vendor Tables and Teardown - ------------------------------------------------------------------ - -- Bob Ross Teraspeed Consulting Group LLC Teraspeed Labs 121 North River Drive 13610 SW Harness Lane Narragansett, RI 02882 Beaverton, OR 97008 401-284-1827 503-430-1065 http://www.teraspeed.com 503-246-8048 Direct bob@teraspeed.com Teraspeed is a registered service mark of Teraspeed Consulting Group LLC - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Fri, 20 Oct 2006 10:06:34 +0200 From: Fabio BRINA Subject: [IBIS-Users] double Supply Voltage Hi ibis experts, In my Level traslator , I have VCC1 in the input side (where there is "in" Pin) and VCC2 in the output side (where there is "out" Pin) . With VCC1=1.8V and VCC2=2.9V. In which way I can explain this condition? is this correct? [Pin] signal_name model_name R_pin L_pin C_pin | in in mod_in out out mod_out VSS VSS GND VCC1 VCC1 POWER VCC2 VCC2 POWER Or I must use Pin Mapping ? thank you for any possible response. Regards, Fabio - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Mon, 23 Oct 2006 21:56:41 -0700 From: "Mirmak, Michael" Subject: [IBIS-Users] Agenda - Asian IBIS Summit (Japan) To all attendees of the Asian IBIS Summit (Japan) October 31: We are very much looking forward to seeing you next week. Please make sure that you arrive allowing sufficient time to sign in before the presentations begin. Business cards will serve as meeting badges. See you in Tokyo! Takeshi Watanabe NEC Electronics Corp. Chair, JEITA EDA Working Group Michael Mirmak Intel Corp. Chair, EIA IBIS Open Forum - ------------------------------------------------------------------ A S I A N I B I S S U M M I T I N F O R M A T I O N Time/Date: 8:30 - 15:00, Tuesday, October 31, 2006 Location: JEITA Headquarters 3rd Fl., Mitsui Sumitomo Kaijo Bldg. Annex 11, Kanda Surugadai 3-chome, Chiyoda-ku, Tokyo 101-0062 JAPAN http://www.jeita.or.jp/english/about/location/index.htm Registration: FREE, send to both addresses below: Name: E-mail address: Company: Telephone: Bob Ross, Teraspeed Consulting Group bob@teraspeed.com Takeshi Watanabe, NEC Electronics Corp. takeshi.watanabe@necel.com Organizational Sponsors: Japan Electronics and Information Technology Industries Association (JEITA) EIA IBIS Open Forum Co-sponsors (in alphabetical order): ATE Service Corporation (Sigrity) Cadence Design Systems Cybernet Systems (formerly KAW) Mentor Graphics Synopsys - ------------------------------------------------------------------ I B I S S U M M I T M E E T I N G A G E N D A 8:30 REFRESHMENTS & SIGN IN 9:00 Introductions and Program Overview - Welcome, Takeshi Watanabe, (NEC Electronics, Japan) - Welcome to Summit, Michael Mirmak (Intel Corporation, USA) 9:15 JEITA EDA - WG Activity Takeshi Watanabe (NEC Electronics, Japan) 9:45 The Direction of IBIS as a Standard Michael Mirmak (Intel Corporation, USA) 10:00 System-Level Timing Closure Using IBIS Models Barry Katz (Signal Integrity Software (SiSoft), USA) 10:30 BREAK (Refreshments) 10:45 IBIS 4.2 and VHDL-AMS for Serdes and DDR2 Analysis Ian Dodd and Gary Pratt (Mentor Graphics Corporation, USA) 11:15 PDA for SI Analysis in LTI Systems - A VHDL-AMS Test Case Arpad Muranyi and Michael Mirmak (Intel Corporation, USA) 11:45 ODT, Pre-Emphasis, and Speed Bob Ross (Teraspeed Consulting Group, USA) 12:00 FREE BUFFET LUNCH (Hosted by Sponsors) 12:45 Case Study: Spice Macromodeling for PCI Express Using IBIS 4.2 Wang, Lance (Cadence Design Systems, USA) 13:15 Study of Interconnect Model Hiroaki Ikeda Japan Aviation Electronics, Japan) 13:45 System-Level SSO Simulation Techniques with Various IBIS Package Models Sam Chitwood*, Jack W.C. Lin**, and Raymond Y. Chen* (Sigrity, *USA and **China) 14:15 IBIS Model Engineering for SI Analysis Kazuhiko Kusunoki (Cybernet Systems, Japan) 14:45 CONCLUDING ITEMS, BREAK 15:00 END OF IBIS SUMMIT MEETING - ------------------------------------------------------------------ - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Fri, 27 Oct 2006 08:42:13 +0800 From: "NG,MEI-YEE" Subject: [IBIS-Users] Die Capacitance This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6F960.BEA21B88 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Dear IBIS users, =20 Appreciate your help on clarifying the C_comp parameter in the .s2i file. When I run the s2ibis3, I used an RC extracted netlist as my spectre input. My question is, do I still need to specify the C_comp in the .s2i file, since the RC extraction should have taken care of this capacitance already? Am I double calculating the die capacitance if I include C_comp in .s2i file? =20 How will the default 5pF in the .ibs affect my output if I did not specify any C_comp in .s2i earlier? =20 Appreciate your kind feedback. =20 Thank you. =20 Best regards, Mei Yee - ------_=_NextPart_001_01C6F960.BEA21B88 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Dear IBIS users,

Appreciate your help on clarifying the C_comp = parameter in the .s2i file. When I run the s2ibis3, I used an RC extracted netlist as = my spectre input. My question is, do I still need to specify the C_comp in = the .s2i file, since the RC extraction should have taken care of this = capacitance already? Am I double calculating the die capacitance if I include C_comp = in .s2i file?

How will the default 5pF in the .ibs affect my = output if I did not specify any C_comp in .s2i earlier?

Appreciate your kind = feedback.

Thank you.

Best regards,

Mei Yee

- ------_=_NextPart_001_01C6F960.BEA21B88-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Fri, 27 Oct 2006 08:42:13 +0800 From: "NG,MEI-YEE" Subject: [IBIS-Users] Die Capacitance This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6F960.BEA21B88 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Dear IBIS users, =20 Appreciate your help on clarifying the C_comp parameter in the .s2i file. When I run the s2ibis3, I used an RC extracted netlist as my spectre input. My question is, do I still need to specify the C_comp in the .s2i file, since the RC extraction should have taken care of this capacitance already? Am I double calculating the die capacitance if I include C_comp in .s2i file? =20 How will the default 5pF in the .ibs affect my output if I did not specify any C_comp in .s2i earlier? =20 Appreciate your kind feedback. =20 Thank you. =20 Best regards, Mei Yee - ------_=_NextPart_001_01C6F960.BEA21B88 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Dear IBIS users,

How will the default 5pF in the .ibs affect my = output if I did not specify any C_comp in .s2i earlier?

Appreciate your kind = feedback.

Thank you.

Best regards,

Mei Yee

- ------_=_NextPart_001_01C6F960.BEA21B88-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Mon, 30 Oct 2006 19:09:14 +0900 From: "Xuefeng Chen" Subject: [IBIS-Users] about the keyword [frequency] of ICM 1.1 This is a multi-part message in MIME format. - ------_=_NextPart_001_01C6FC0B.73857A1C Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Expert, I found for frequency dependent Matrix where [Frequency] is omitted only in [Resistance Matrix](like Matrix Example in IIRD2.3), ICMCHK1 will report bellow error. ERROR:'[Resistance Matrix]' does not have the same number of frequencies as '[Inductance Matrix]' =20 ICM1.1 spec. tell us that "If a matrix keyword, such as [Resistance Matrix] etc., is used in combination with one or more [Frequency] keyword data sets, all other matrix keywords, if present and consisting of non-zero frequency-dependent data, must contain [Frequency] data sets at the same frequency points." =20 So is it a bug?=20 Thanks for any input! =20 Best regards Xuefeng - ------_=_NextPart_001_01C6FC0B.73857A1C Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Expert,

I found for frequency dependent Matrix where = [Frequency] is omitted only in [Resistance Matrix](like Matrix Example in IIRD2.3), = ICMCHK1 will report bellow error.

ERROR:'[Resistance Matrix]' does not have the same number of frequencies as '[Inductance = Matrix]'

= ICM1.1 spec. tell us that “If a matrix keyword, such as [Resistance = Matrix] etc., is used

in combination with = one or more [Frequency] keyword data sets, all other matrix keywords, if = present and consisting of non-zero frequency-dependent data, must contain = [Frequency] data sets at the same frequency points.”

So is it a bug?

Thanks for any input!

Best regards

Xuefeng

- ------_=_NextPart_001_01C6FC0B.73857A1C-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 8 Nov 2006 10:54:33 +0530 From: Sudarshan Honnudike Subject: [IBIS-Users] Warnings in V-t curves This is a multipart message in MIME format. - --=_alternative 001D88E065257220_= Content-Type: text/plain; charset="US-ASCII" Hi Experts, I am getting the following warnings while running ibischk3 on the buffer models. WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V Our buffer models will be operating at 2 voltages coreside voltage and pad side voltage. In this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) is 2.5v. So in V-t waveforms 1. Rising waveform with R_fix connected to VDDE(2.5v): waveforms are varying from 1.249v to 2.5v 2. Falling waveform with R_fix connected to VDDE(2.5v):waveforms are varying from 2.5v to 1.254v I have a confusion regarding the selection of Vmeas. Should it be half of corevoltage(1.2/2) or half of pad voltage (2.5/2)? Please let me know how this parameter is used in the application (may be in SI or somewhere else). I even changed Vmeas to 1.25 V. Still I am getting warnings like WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V Please let me know your answers. Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. Ph:+91-80-40247073 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com - --=_alternative 001D88E065257220_= Content-Type: text/html; charset="US-ASCII"
Hi Experts,

I am getting the following warnings while running ibischk3 on the buffer models.

WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=0.6V
given load Rref=1e+09 Ohms to Vref=0V
WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=0.6V
given load Rref=1e+09 Ohms to Vref=0V
WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=0.6V
given load Rref=1e+09 Ohms to Vref=0V

Our buffer models will be operating at 2 voltages coreside voltage and pad side voltage.
In this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) is 2.5v. So in V-t waveforms

1. Rising waveform with R_fix connected to VDDE(2.5v): waveforms are varying from 1.249v to 2.5v
2. Falling waveform with R_fix connected to VDDE(2.5v):waveforms are varying from 2.5v to 1.254v

I have a confusion regarding the selection of Vmeas. Should it be half of corevoltage(1.2/2) or half of pad voltage (2.5/2)?
Please let me know how this parameter is used in the application (may be in SI or somewhere else).

I even changed Vmeas to 1.25 V. Still I am getting warnings like

WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=1.25V
given load Rref=1e+009 Ohms to Vref=0V
WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=1.25V
given load Rref=1e+009 Ohms to Vref=0V
WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=1.25V
given load Rref=1e+009 Ohms to Vref=0V

Please let me know your answers.

Best Regards,

Sudarshan HN
NXP Semiconductors/CTO /PLT
# 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India.
Ph:+91-80-40247073
Fax: +91-80-4024 7855
seri:sudarsha@inpsblr
E-mail: sudarshan.honnudike@nxp.com - --=_alternative 001D88E065257220_=-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Tue, 07 Nov 2006 22:27:41 -0800 From: Bob Ross Subject: Re: [IBIS-Users] Warnings in V-t curves Hello Sudarshan: I would have to see the full buffer model you are using in case there are other surprise issues. However, based on the waveform information you supplied, the buffer appears to be Open_drain or else have a very weak [Pullup] table. The rising and falling waveform maximum endpoints are just the V_fixture voltage of 2.5 V. You do not give the R_fixture value, but I assume it is in the order fo 50 ohms to get the votage swings. The timing load test case of Rref/Vref is 1e9 and 0 V. Even if the voltage is changed to 2.5 V, the 1e9 resistance is still too large to cause the buffer to reach any reasonable Vmeas voltage. Try using 50 ohms to 2.5 V. The actual values are based on the timing delay specification reference setup and referenced to the pad voltages. The Vmeas value would have to be between 1.25 and 2.5 V, consistent with the Rising and Falling Waveform tables. Bob Sudarshan Honnudike wrote: > > Hi Experts, > > I am getting the following warnings while running ibischk3 on the buffer > models. > > WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through > Vmeas=0.6V > given load Rref=1e+09 Ohms to Vref=0V > WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through > Vmeas=0.6V > given load Rref=1e+09 Ohms to Vref=0V > WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through > Vmeas=0.6V > given load Rref=1e+09 Ohms to Vref=0V > > Our buffer models will be operating at 2 voltages coreside voltage and > pad side voltage. > In this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) > is 2.5v. So in V-t waveforms > > 1. Rising waveform with R_fix connected to VDDE(2.5v): waveforms are > varying from 1.249v to 2.5v > 2. Falling waveform with R_fix connected to VDDE(2.5v):waveforms are > varying from 2.5v to 1.254v > > I have a confusion regarding the selection of Vmeas. Should it be half > of corevoltage(1.2/2) or half of pad voltage (2.5/2)? > Please let me know how this parameter is used in the application (may be > in SI or somewhere else). > > I even changed Vmeas to 1.25 V. Still I am getting warnings like > > WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through > Vmeas=1.25V > given load Rref=1e+009 Ohms to Vref=0V > WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through > Vmeas=1.25V > given load Rref=1e+009 Ohms to Vref=0V > WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through > Vmeas=1.25V > given load Rref=1e+009 Ohms to Vref=0V > > Please let me know your answers. > > Best Regards, > > Sudarshan HN > NXP Semiconductors/CTO /PLT > # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. > Ph:+91-80-40247073 > Fax: +91-80-4024 7855 > seri:sudarsha@inpsblr > E-mail: sudarshan.honnudike@nxp.com - -- Bob Ross Teraspeed Consulting Group LLC Teraspeed Labs 121 North River Drive 13610 SW Harness Lane Narragansett, RI 02882 Beaverton, OR 97008 401-284-1827 503-430-1065 http://www.teraspeed.com 503-246-8048 Direct bob@teraspeed.com Teraspeed is a registered service mark of Teraspeed Consulting Group LLC - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Tue, 7 Nov 2006 22:52:07 -0800 From: "Lynne D. Green" Subject: RE: [IBIS-Users] Warnings in V-t curves Hello, Sudarshan, 1) Please use ibischk4. This is capable of checking [IBIS ver] 3.2 models. Bug fixes and enhancements are not patched back into older versions of ibischk. 2) Rref, Cref, Vref and Vmeas are used for hardware testing, and should be on the I/O data sheet or on the I/O interface specification. Vmeas is normally between Vinl and Vinh. 3) Rref default value is 50 ohms. 1E+9 is not a reasonable value. 4) Vcc_core is not used in the IBIS model. It is used only in simulation to drive the "core" pins (Enable, Data) on the I/O buffer. 5) There are two good sources of modeling help. These are the IBIS Cookbook http://www.eigroup.org/ibis/tools.htm and the IBIS Quality Checklist http://www.vhdl.org/pub/ibis/quality_wip/ Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com- Lynne ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Sudarshan Honnudike Sent: Tuesday, November 07, 2006 9:25 PM To: ibis-users@eda.org; ibis-info@eda.org Subject: [IBIS-Users] Warnings in V-t curves Hi Experts, I am getting the following warnings while running ibischk3 on the buffer models. WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V Our buffer models will be operating at 2 voltages coreside voltage and pad side voltage. In this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) is 2.5v. So in V-t waveforms 1. Rising waveform with R_fix connected to VDDE(2.5v): waveforms are varying from 1.249v to 2.5v 2. Falling waveform with R_fix connected to VDDE(2.5v):waveforms are varying from 2.5v to 1.254v I have a confusion regarding the selection of Vmeas. Should it be half of corevoltage(1.2/2) or half of pad voltage (2.5/2)? Please let me know how this parameter is used in the application (may be in SI or somewhere else). I even changed Vmeas to 1.25 V. Still I am getting warnings like WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V Please let me know your answers. Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. Ph:+91-80-40247073 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 8 Nov 2006 13:51:46 +0530 From: Sudarshan Honnudike Subject: RE: [IBIS-Users] Warnings in V-t curves This is a multipart message in MIME format. - --=_alternative 002DB89065257220_= Content-Type: text/plain; charset="US-ASCII" Hi Bob & Lynne, I want to get some more clarifications on your answers. Lynne told that , Vmeas should be between Vinl and Vinh. As Vin = 1.2 V , Vinl and Vinh would be 0.36 and 0.84 V respectively . In that case Vmeas should be between 0.36 and 0.84. But if we connect R_fix to VDDE(2.5 V) then in falling waveform, it will fall to 1.25V. So in that case it will not cross Vmeas. So according to what Bob suggested, Vmeas should be between 1.25 and 2.5 V. Please correct me if i am wrong in explanation. And as Bob said, it is an open drain cell. I have taken R_fix as 44 ohm. I have changed R_ref to 50 ohm , Vmeas to 1.25 V and V_ref to 1.3V. Now I am able to get rid of those warnings. From the cookbook I understood that Vref, Cref, Rref and Vmeas are AC test load conditions. i.e, under this setup, buffer's delay information is measured. Can we use the same value of R_fix, C_fix and V_fix to Rref , Cref and Vref parameters, as under these parameters we measure the V-t waveforms. ? Please let me know your answers. Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. Ph:+91-80-40247073 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com "Lynne D. Green" 2006-11-08 12:22 PM To "'Sudarshan Honnudike'"

cc Subject RE: [IBIS-Users] Warnings in V-t curves Classification Hello, Sudarshan, 1) Please use ibischk4. This is capable of checking [IBIS ver] 3.2 models. Bug fixes and enhancements are not patched back into older versions of ibischk. 2) Rref, Cref, Vref and Vmeas are used for hardware testing, and should be on the I/O data sheet or on the I/O interface specification. Vmeas is normally between Vinl and Vinh. 3) Rref default value is 50 ohms. 1E+9 is not a reasonable value. 4) Vcc_core is not used in the IBIS model. It is used only in simulation to drive the "core" pins (Enable, Data) on the I/O buffer. 5) There are two good sources of modeling help. These are the IBIS Cookbook http://www.eigroup.org/ibis/tools.htm and the IBIS Quality Checklist http://www.vhdl.org/pub/ibis/quality_wip/ Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com- Lynne ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Sudarshan Honnudike Sent: Tuesday, November 07, 2006 9:25 PM To: ibis-users@eda.org; ibis-info@eda.org Subject: [IBIS-Users] Warnings in V-t curves Hi Experts, I am getting the following warnings while running ibischk3 on the buffer models. WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V Our buffer models will be operating at 2 voltages coreside voltage and pad side voltage. In this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) is 2.5v. So in V-t waveforms 1. Rising waveform with R_fix connected to VDDE(2.5v): waveforms are varying from 1.249v to 2.5v 2. Falling waveform with R_fix connected to VDDE(2.5v):waveforms are varying from 2.5v to 1.254v I have a confusion regarding the selection of Vmeas. Should it be half of corevoltage(1.2/2) or half of pad voltage (2.5/2)? Please let me know how this parameter is used in the application (may be in SI or somewhere else). I even changed Vmeas to 1.25 V. Still I am getting warnings like WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V Please let me know your answers. Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. Ph:+91-80-40247073 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com - --=_alternative 002DB89065257220_= Content-Type: text/html; charset="US-ASCII"
Hi Bob & Lynne,

I want to get some more clarifications on your answers. Lynne told that , Vmeas should be between
Vinl and Vinh. As Vin = 1.2 V , Vinl and Vinh would be 0.36 and 0.84 V respectively . In that case Vmeas
should be between 0.36 and 0.84. But if we connect R_fix to VDDE(2.5 V) then in falling waveform, it will fall to
1.25V. So in that case it will not cross Vmeas.

So according to what Bob suggested, Vmeas should be between 1.25 and 2.5 V. Please correct me if i am wrong in
explanation.

And as Bob said, it is an open drain cell. I have taken R_fix as 44 ohm.

I have changed R_ref to 50 ohm , Vmeas to 1.25 V and V_ref to 1.3V. Now I am able to get rid of those warnings.

From the cookbook I understood that Vref, Cref, Rref and Vmeas are AC test load conditions. i.e, under this setup,
buffer's delay information is measured. Can we use the same value of R_fix, C_fix and V_fix to Rref , Cref and Vref
parameters, as under these parameters we measure the V-t waveforms. ?

Please let me know your answers.

Best Regards,

Sudarshan HN
NXP Semiconductors/CTO /PLT
# 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India.
Ph:+91-80-40247073
Fax: +91-80-4024 7855
seri:sudarsha@inpsblr
E-mail: sudarshan.honnudike@nxp.com

"Lynne D. Green" <lgreen22@mindspring.com>

2006-11-08 12:22 PM

To	"'Sudarshan Honnudike'" <sudarshan.honnudike@nxp.com> <ibis-users@eda.org> <ibis-info@eda.org>
cc
Subject	RE: [IBIS-Users] Warnings in V-t curves
Classification

Hello, Sudarshan, 1) Please use ibischk4. This is capable of checking [IBIS ver] 3.2 models. Bug fixes and enhancements are not patched back into older versions of ibischk. 2) Rref, Cref, Vref and Vmeas are used for hardware testing, and should be on the I/O data sheet or on the I/O interface specification. Vmeas is normally between Vinl and Vinh. 3) Rref default value is 50 ohms. 1E+9 is not a reasonable value. 4) Vcc_core is not used in the IBIS model. It is used only in simulation to drive the "core" pins (Enable, Data) on the I/O buffer. 5) There are two good sources of modeling help. These are the IBIS Cookbook http://www.eigroup.org/ibis/tools.htm and the IBIS Quality Checklist http://www.vhdl.org/pub/ibis/quality_wip/ Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com- Lynne ________________________________ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Sudarshan Honnudike Sent: Tuesday, November 07, 2006 9:25 PM To: ibis-users@eda.org; ibis-info@eda.org Subject: [IBIS-Users] Warnings in V-t curves Hi Experts, I am getting the following warnings while running ibischk3 on the buffer models. WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V Our buffer models will be operating at 2 voltages coreside voltage and pad side voltage. In this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) is 2.5v. So in V-t waveforms 1. Rising waveform with R_fix connected to VDDE(2.5v): waveforms are varying from 1.249v to 2.5v 2. Falling waveform with R_fix connected to VDDE(2.5v):waveforms are varying from 2.5v to 1.254v I have a confusion regarding the selection of Vmeas. Should it be half of corevoltage(1.2/2) or half of pad voltage (2.5/2)? Please let me know how this parameter is used in the application (may be in SI or somewhere else). I even changed Vmeas to 1.25 V. Still I am getting warnings like WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V Please let me know your answers. Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. Ph:+91-80-40247073 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com
- --=_alternative 002DB89065257220_=-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 08 Nov 2006 16:46:33 +0100 From: Fabio BRINA Subject: [IBIS-Users] functional check Hello experts, do you know were I can find some documentation about the matching between IBIS model simulation and Spice / Eldo simulation? (Functional Check). I'd like to understand (for example) in witch way the EDA tool define the voltage controlled current sources (of the ibis representation) frome ibis model. Thank you, Fabio - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 8 Nov 2006 08:33:03 -0800 From: "David Banas" Subject: RE: [IBIS-Users] functional check Fabio, Attached is a suite of ".MEAS" / ".PRINT" Spice directives, which we've just started using here at Xilinx, in order to automate the validation of our IBIS models against their Spice counterparts. In the attached, "rnr_pad" is the Spice model output node, while "nd1_out" is the IBIS model output node. I hope that's helpful. Regards, - -David Banas - --- Attachment begins here. --- ************************************************************************ ******* ** Automated Measurements ************************************************************************ ******* * An arbitrary threshold of max/2 is used to "bootstrap" the measurements. .MEASURE TRAN max_sp MAX v(rnr_pad) + FROM = "5ns" + TO = "5ns + clk_period" .MEASURE TRAN half_max PARAM="(max_sp/2)" * Measure the delays in the first rising edges of IBIS and Spice waveforms. * This tells us where to take our "high" and "low" averages. .MEASURE TRAN dly_sp + TRIG AT=5ns + TARG v(rnr_pad) VAL=half_max TD=TRIG RISE=1 .MEASURE TRAN dly_ib + TRIG AT=5ns + TARG v(nd1_out) VAL=half_max TD=TRIG RISE=1 * Now, find the average "high" and "low" values, which will be compared, * and used to calculate the "20%", "50%", and "80%" points that are used * in subsequent measurements. .MEASURE TRAN high_sp AVG v(rnr_pad) + FROM = "5ns + dly_sp + (clk_period/6)" $ Using the middle third to + TO = "5ns + dly_sp + (2*clk_period/6)" $ calculate the high level. .MEASURE TRAN high_ib AVG v(nd1_out) + FROM = "5ns + dly_ib + (clk_period/6)" + TO = "5ns + dly_ib + (2*clk_period/6)" .MEASURE TRAN low_sp AVG v(rnr_pad) + FROM = "5ns + dly_sp + (clk_period/2) + (clk_period/6)" + TO = "5ns + dly_sp + (clk_period/2) + (2*clk_period/6)" .MEASURE TRAN low_ib AVG v(nd1_out) + FROM = "5ns + dly_ib + (clk_period/2) + (clk_period/6)" + TO = "5ns + dly_ib + (clk_period/2) + (2*clk_period/6)" * Calculate 20/50/80 points. .MEASURE TRAN eighty_sp + PARAM="low_sp + (high_sp-low_sp)*0.8" .MEASURE TRAN eighty_ib + PARAM="low_ib + (high_ib-low_ib)*0.8" .MEASURE TRAN fifty_sp + PARAM="low_sp + (high_sp-low_sp)*0.5" .MEASURE TRAN fifty_ib + PARAM="low_ib + (high_ib-low_ib)*0.5" .MEASURE TRAN twenty_sp + PARAM="low_sp + (high_sp-low_sp)*0.2" .MEASURE TRAN twenty_ib + PARAM="low_ib + (high_ib-low_ib)*0.2" * Measure rise/fall times. .MEASURE TRAN tr_spice + TRIG v(rnr_pad) VAL=twenty_sp TD=5n RISE=1 + TARG v(rnr_pad) VAL=eighty_sp TD=TRIG RISE=1 .MEASURE TRAN tr_ibis + TRIG v(nd1_out) VAL=twenty_ib TD=5n RISE=1 + TARG v(nd1_out) VAL=eighty_ib TD=TRIG RISE=1 .MEASURE TRAN tf_spice + TRIG v(rnr_pad) VAL=eighty_sp TD=5n FALL=1 + TARG v(rnr_pad) VAL=twenty_sp TD=TRIG FALL=1 .MEASURE TRAN tf_ibis + TRIG v(nd1_out) VAL=eighty_ib TD=5n FALL=1 + TARG v(nd1_out) VAL=twenty_ib TD=TRIG FALL=1 * Measure duty cycles. .MEASURE TRAN th_spice + TRIG v(rnr_pad) VAL=fifty_sp TD=5n RISE=1 + TARG v(rnr_pad) VAL=fifty_sp TD=TRIG FALL=1 .MEASURE TRAN th_ibis + TRIG v(nd1_out) VAL=fifty_ib TD=5n RISE=1 + TARG v(nd1_out) VAL=fifty_ib TD=TRIG FALL=1 .MEASURE TRAN tl_spice + TRIG v(rnr_pad) VAL=fifty_sp TD=5n FALL=1 + TARG v(rnr_pad) VAL=fifty_sp TD=TRIG RISE=1 .MEASURE TRAN tl_ibis + TRIG v(nd1_out) VAL=fifty_ib TD=5n FALL=1 + TARG v(nd1_out) VAL=fifty_ib TD=TRIG RISE=1 .MEASURE dc_spice + PARAM='th_spice/(th_spice + tl_spice)' .MEASURE dc_ibis + PARAM='th_ibis/(th_ibis + tl_ibis)' * Measure the errors. .MEASURE TRAN high_err + PARAM="(high_ib - high_sp)/high_sp" .MEASURE TRAN low_err + PARAM="(low_ib - low_sp)/low_sp" .MEASURE TRAN risetime_err + PARAM="(tr_ibis - tr_spice)/tr_spice" .MEASURE TRAN falltime_err + PARAM="(tf_ibis - tf_spice)/tf_spice" .MEASURE TRAN dutycycle_err + PARAM="(dc_ibis - dc_spice)/dc_spice" *** Report the results. .PRINT high_err .PRINT low_err .PRINT risetime_err .PRINT falltime_err .PRINT dutycycle_err - --- Attachment ends here. --- > -----Original Message----- > From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf > Of Fabio BRINA > Sent: Wednesday, November 08, 2006 7:47 AM > To: ibis-users@eda.org; ibis-info@eda.org > Subject: [IBIS-Users] functional check > > > Hello experts, > > do you know were I can find some documentation > about the matching between IBIS model simulation > and Spice / Eldo simulation? (Functional Check). > I'd like to understand (for example) in > witch way the EDA tool define the voltage > controlled current sources (of the ibis representation) > frome ibis model. > > Thank you, > Fabio > > -------------------------------------------------------------------- > |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org > |with the appropriate command message(s) in the body: > | > | help > | subscribe ibis > | subscribe ibis-users > | unsubscribe ibis > | unsubscribe ibis-users > | > |or e-mail a request to ibis-request@eda-stds.org. > | > |IBIS reflector archives exist under: > | > | http://www.eda-stds.org/pub/ibis/email_archive/ Recent > | http://www.eda-stds.org/pub/ibis/users_archive/ Recent > | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 8 Nov 2006 08:33:17 -0800 From: "Muranyi, Arpad" Subject: RE: [IBIS-Users] functional check Fabio, One way of doing that would be to talk to your favorite tool vendor and ask them how they implemented their IBIS algorithms. Another way could be to look at the *-AMS implementation I published publicly on the IBIS web site: http://www.vhdl.org/pub/ibis/summits/jun03b/muranyi1.pdf I hope that helps. Arpad ========================================================= - -----Original Message----- From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of Fabio BRINA Sent: Wednesday, November 08, 2006 7:47 AM To: ibis-users@server.eda.org; ibis-info@server.eda.org Subject: [IBIS-Users] functional check Hello experts, do you know were I can find some documentation about the matching between IBIS model simulation and Spice / Eldo simulation? (Functional Check). I'd like to understand (for example) in witch way the EDA tool define the voltage controlled current sources (of the ibis representation) frome ibis model. Thank you, Fabio - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ Date: Wed, 8 Nov 2006 08:43:45 -0800 From: "Muranyi, Arpad" Subject: RE: [IBIS-Users] Warnings in V-t curves This is a multi-part message in MIME format. - ------_=_NextPart_001_01C70355.0EEB02DA Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sudarshan, =20 One thing that I haven't seen in any of the responses yet is the definition of Vmeas. From the IBIS specification: =20 | The Vmeas subparameter is the timing reference voltage level | that the semiconductor vendor uses for the model. Include | Cref, Rref, Vref, and Vmeas information to facilitate | board-level timing simulation. =20 In other words, this is the voltage at which Tco is measured with the load circuit which is described by Rref, Cref, Vref. This information is usually available in the data sheet of a chip. You need to have an understanding of what Tco means, how it is measured for the data sheet, and what it is used for in the timing spreadsheet together with the flight time and setup and hold time parameters. Welcome to signal integrity! =20 If you have a buffer that cannot drive through this value using the give Vref, Rref and Cref load, Vmeas becomes useless. =20 Arpad =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 ________________________________ From: owner-ibis-users@server.eda.org = [mailto:owner-ibis-users@server.eda.org] On Behalf Of Sudarshan = Honnudike Sent: Wednesday, November 08, 2006 12:22 AM To: Lynne D. Green; Bob Ross Cc: ibis-info@server.eda.org; ibis-users@server.eda.org Subject: RE: [IBIS-Users] Warnings in V-t curves Hi Bob & Lynne,=20 I want to get some more clarifications on your answers. Lynne told that = , Vmeas should be between=20 Vinl and Vinh. As Vin =3D 1.2 V , Vinl and Vinh would be 0.36 and 0.84 V = respectively . In that case Vmeas=20 should be between 0.36 and 0.84. But if we connect R_fix to VDDE(2.5 V) = then in falling waveform, it will fall to=20 1.25V. So in that case it will not cross Vmeas.=20 So according to what Bob suggested, Vmeas should be between 1.25 and = 2.5 V. Please correct me if i am wrong in=20 explanation.=20 And as Bob said, it is an open drain cell. I have taken R_fix as 44 ohm. = I have changed R_ref to 50 ohm , Vmeas to 1.25 V and V_ref to 1.3V. Now = I am able to get rid of those warnings.=20 From the cookbook I understood that Vref, Cref, Rref and Vmeas are AC = test load conditions. i.e, under this setup,=20 buffer's delay information is measured. Can we use the same value of = R_fix, C_fix and V_fix to Rref , Cref and Vref=20 parameters, as under these parameters we measure the V-t waveforms. ?=20 Please let me know your answers.=20 Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. =20 Ph:+91-80-40247073 =20 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com=20 "Lynne D. Green" =20 2006-11-08 12:22 PM=20 To "'Sudarshan Honnudike'"

=20 cc Subject RE: [IBIS-Users] Warnings in V-t curves=20 Classification =09 Hello, Sudarshan, 1) Please use ibischk4. This is capable of checking [IBIS ver] 3.2 = models. Bug fixes and enhancements are not patched back into older versions of ibischk. 2) Rref, Cref, Vref and Vmeas are used for hardware testing, and should = be on the I/O data sheet or on the I/O interface specification. Vmeas is normally between Vinl and Vinh. 3) Rref default value is 50 ohms. 1E+9 is not a reasonable value. 4) Vcc_core is not used in the IBIS model. It is used only in = simulation to drive the "core" pins (Enable, Data) on the I/O buffer. 5) There are two good sources of modeling help. These are the IBIS Cookbook http://www.eigroup.org/ibis/tools.htm=20 and the IBIS Quality Checklist http://www.vhdl.org/pub/ibis/quality_wip/ Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com- Lynne ________________________________ From: owner-ibis-users@eda.org = [mailto:owner-ibis-users@eda.org] On Behalf Of Sudarshan Honnudike Sent: Tuesday, November 07, 2006 9:25 PM To: ibis-users@eda.org; ibis-info@eda.org Subject: [IBIS-Users] Warnings in V-t curves =20 =20 Hi Experts,=20 =20 I am getting the following warnings while running = ibischk3 on the buffer models.=20 =20 WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves = cannot drive through Vmeas=3D0.6V=20 given load Rref=3D1e+09 Ohms to Vref=3D0V=20 WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves = cannot drive through Vmeas=3D0.6V=20 given load Rref=3D1e+09 Ohms to Vref=3D0V=20 WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves = cannot drive through Vmeas=3D0.6V=20 given load Rref=3D1e+09 Ohms to Vref=3D0V=20 =20 Our buffer models will be operating at 2 voltages = coreside voltage and pad side voltage.=20 In this case, coreside voltage(VDD) is 1.2 v and pad = side voltage(VDDE) is 2.5v. So in V-t waveforms=20 =20 1. Rising waveform with R_fix connected to VDDE(2.5v): = waveforms are varying from 1.249v to 2.5v=20 2. Falling waveform with R_fix connected to = VDDE(2.5v):waveforms are varying from 2.5v to 1.254v=20 =20 I have a confusion regarding the selection of Vmeas. = Should it be half of corevoltage(1.2/2) or half of pad voltage (2.5/2)?=20 Please let me know how this parameter is used in the = application (may be in SI or somewhere else).=20 =20 I even changed Vmeas to 1.25 V. Still I am getting = warnings like=20 =20 WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves = cannot drive through Vmeas=3D1.25V=20 given load Rref=3D1e+009 Ohms to Vref=3D0V=20 WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves = cannot drive through Vmeas=3D1.25V=20 given load Rref=3D1e+009 Ohms to Vref=3D0V=20 WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves = cannot drive through Vmeas=3D1.25V=20 given load Rref=3D1e+009 Ohms to Vref=3D0V=20 =20 Please let me know your answers.=20 =20 Best Regards, =20 Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. = Ph:+91-80-40247073 =20 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com - ------_=_NextPart_001_01C70355.0EEB02DA Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Sudarshan,

One thing=20 that I haven't seen in any of the responses yet

is the=20 definition of Vmeas. From the IBIS = specification:

| The=20 Vmeas subparameter is the timing reference voltage level
| that = the=20 semiconductor vendor uses for the model. Include
| Cref, = Rref,=20 Vref, and Vmeas information to facilitate
| board-level timing=20 simulation.

In other=20 words, this is the voltage at which Tco is measured

with the=20 load circuit which is described by Rref, Cref, Vref.

This=20 information is usually available in the data sheet of = a

chip. =20 You need to have an understanding of what Tco means,

how it is=20 measured for the data sheet, and what it is used for

in the=20 timing spreadsheet together with the flight time and

setup and=20 hold time parameters. Welcome to signal = integrity!

If you have=20 a buffer that cannot drive through this value using

the give=20 Vref, Rref and Cref load, Vmeas becomes useless.

Arpad

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=

From: = owner-ibis-users@server.eda.org=20 [mailto:owner-ibis-users@server.eda.org] On Behalf Of Sudarshan=20 Honnudike
Sent: Wednesday, November 08, 2006 12:22 = AM
To:=20 Lynne D. Green; Bob Ross
Cc: ibis-info@server.eda.org;=20 ibis-users@server.eda.org
Subject: RE: [IBIS-Users] Warnings = in V-t=20 curves

Hi Bob & Lynne,

I want to=20 get some more clarifications on your answers. Lynne told that , Vmeas = should be=20 between
Vinl and Vinh. As = Vin =3D 1.2 V ,=20 Vinl and Vinh would be 0.36 and 0.84 V respectively . In that case = Vmeas=20
should be between 0.36 and 0.84. = But if we=20 connect R_fix to VDDE(2.5 V) then in falling waveform, it will fall = to=20
1.25V. So in that case it will not = cross=20 Vmeas.

So according to = what Bob=20 suggested, Vmeas should be between 1.25 and 2.5 V. Please correct = me if i=20 am wrong in
explanation.=20

And as Bob said, it is an open = drain cell.=20 I have taken R_fix as 44 ohm.

I have=20 changed R_ref to 50 ohm , Vmeas to 1.25 V and V_ref to 1.3V. Now I am = able to=20 get rid of those warnings.

From the=20 cookbook I understood that Vref, Cref, Rref and Vmeas are AC test load=20 conditions. i.e, under this setup,
buffer's delay information is measured. Can we use the same = value of=20 R_fix, C_fix and V_fix to Rref , Cref and Vref
parameters, as under these parameters we measure the V-t = waveforms.=20 ?

Please let me know = your=20 answers.

Best=20 Regards,

Sudarshan HN
NXP Semiconductors/CTO /PLT
# 1 = Murphy Road,=20 Ulsoor, Bangalore - 560 008 , India.
Ph:+91-80-40247073 =
Fax: +91-80-4024 7855
seri:sudarsha@inpsblr
E-mail:=20 sudarshan.honnudike@nxp.com

"Lynne=20 D. Green" <lgreen22@mindspring.com>

2006-11-08 12:22 PM =

To	"'Sudarshan Honnudike'"=20 = <sudarshan.honnudike@nxp.com> <ibis-users@eda.org> <= ibis-info@eda.org>=20
cc
Subject	RE: [IBIS-Users] Warnings = in V-t=20 curves=20
Classification

Hello, Sudarshan, 1) Please use ibischk4. This = is=20 capable of checking [IBIS ver] 3.2 models. Bug fixes and enhancements = are not=20 patched back into older versions of ibischk. 2) Rref, Cref, = Vref and=20 Vmeas are used for hardware testing, and should be on the I/O data = sheet or=20 on the I/O interface specification. Vmeas is normally between = Vinl and=20 Vinh. 3) Rref default value is 50 ohms. 1E+9 is not a = reasonable=20 value. 4) Vcc_core is not used in the IBIS model. It is = used only=20 in simulation to drive the "core" pins (Enable, Data) on the I/O=20 buffer. 5) There are two good sources of modeling help. = These are=20 the IBIS Cookbook http://www.eigroup.org/ibis/tools.htm and the = IBIS=20 Quality Checklist = http://www.vhdl.org/pub/ibis/quality_wip/ Best=20 regards, Lynne "IBIS training when you need it, where you = need=20 it." Dr. Lynne Green Green Streak=20 Programs http://www.greenstreakprograms.com 425-788-0412 lgreen2= 2@mindspring.com-=20 Lynne ________________________________ = =20 From: owner-ibis-users@eda.org = [mailto:owner-ibis-users@eda.org] On Behalf Of Sudarshan = Honnudike =20 Sent: Tuesday, November = 07,=20 2006 9:25 PM = To:=20 ibis-users@eda.org; ibis-info@eda.org = =20 Subject: [IBIS-Users] Warnings in V-t = curves =20 = =20 = =20 Hi Experts, = =20 I am = getting=20 the following warnings while running ibischk3 on the buffer models.=20 = =20 WARNING - Model = 'bsppon3mchpt3v3_p':=20 TYP VI curves cannot drive through Vmeas=3D0.6V = =20 given = load=20 Rref=3D1e+09 Ohms to Vref=3D0V = =20 WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot=20 drive through Vmeas=3D0.6V = =20 given load Rref=3D1e+09 Ohms = to Vref=3D0V=20 WARNING - = Model=20 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=3D0.6V = =20 = =20 given load Rref=3D1e+09 Ohms to Vref=3D0V = =20 = =20 Our buffer models will be operating at 2 voltages coreside = voltage and=20 pad side voltage. = In=20 this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) = is 2.5v.=20 So in V-t waveforms = =20 1. Rising = waveform=20 with R_fix connected to VDDE(2.5v): waveforms are varying from 1.249v = to 2.5v=20 2. Falling = waveform=20 with R_fix connected to VDDE(2.5v):waveforms are varying from 2.5v to = 1.254v = I have a = confusion=20 regarding the selection of Vmeas. Should it be half of = corevoltage(1.2/2) or=20 half of pad voltage (2.5/2)? = =20 Please let me know how this parameter is used in the=20 application (may be in SI or somewhere else). = =20 = =20 I even changed Vmeas to 1.25 V. Still I am getting warnings like=20 = =20 WARNING - Model = 'bsppon3mchpt3v3_p':=20 TYP VI curves cannot drive through Vmeas=3D1.25V = =20 = given load=20 Rref=3D1e+009 Ohms to Vref=3D0V = =20 WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot=20 drive through Vmeas=3D1.25V = =20 given load = Rref=3D1e+009 Ohms to=20 Vref=3D0V = WARNING -=20 Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through = Vmeas=3D1.25V=20 = =20 given load Rref=3D1e+009 Ohms to Vref=3D0V = =20 = =20 Please let me know your answers. = =20 = =20 Best Regards, = =20 Sudarshan=20 HN NXP=20 Semiconductors/CTO /PLT = =20 # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. =20 =20 Ph:+91-80-40247073 = =20 Fax: +91-80-4024 7855 = =20 seri:sudarsha@inpsblr = =20 E-mail:=20 sudarshan.honnudike@nxp.com
= - ------_=_NextPart_001_01C70355.0EEB02DA-- - -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.org |with the appropriate command message(s) in the body: | | help | subscribe ibis | subscribe ibis-users | unsubscribe ibis | unsubscribe ibis-users | |or e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993 ------------------------------ End of ibis-users V1 #88 ************************