[Fwd: s2ibis2 question?]

Hi,

  Thank Mark and I have the following solution for my previous question
for s2ibis2. I just post here for future reference.

Arthur

SIMPSON_MARK@Tandem.COM wrote:
>
> Arthur,
>
> You have a little of both going on. There is a way to the
> process more automatic AND the s2i file is incomplete. You need to
> add termination to the TN and A nodes in the .sp file since s2ibis2
> does not always terminate them to a voltage source (avoid no dc path
> to ground and ensure the TN node is in it's proper state to generate
> the pullup/down). The s2i file needs the [Model File] statement to
> know which process corner to use. I copied your files, modified them
> and created .ibs files using s2ibis2.sparc and hspice. See the
> attached modified .s2i, .sp and lib files.
>
> Good luck
>
> Mark Simpson
>
> ------------ TEXT ATTACHMENT --------
> SENT 10-14-96 FROM SIMPSON_MARK @ESP
>
> ::::::::::::::
> bd4t.s2i
> ::::::::::::::
> | TEST IBIS characterization
> [IBIS Ver] 2.1
> [File rev] 1.0
> [Date] Mon Oct 14 15:56:30 1996
> [Disclaimer] for characterization purpose only
> [Spice type] hspice
> | [Iterate]
> | [Cleanup]
> [Component] bd4t
> [Manufacturer] Arthur
> | [Package model] pkg_type
> [Spice file] bd4t.sp
> [Temperature range] 50 100 0
> [Voltage range] 3.3 3.0 3.6
> [R_pkg] 1.0m 0.5m 1.5m
> [L_pkg] 2.5nH 2.0nH 3.0nH
> [C_pkg] 4.0pF 3.5pF 4.5pF
> | [Diff pin]
> | describe the differential pin list
>
> | [Pin mapping]
> | currently just neglect this command
>
> [Pin]
> A A s_A A
> TN TN s_TN TN
> IO IO s_IO bd4t
> -> A TN
> VDD vdd s_p POWER
> pGND g GND GND
>
> [Model] A
> [Model type] Input
> [Polarity] Non-Inverting
> [Model File] proc.typ proc.min proc.max
> [Vinl] 0
> [Vinh] 3.3
>
> [Model] TN
> [Model type] Input
> [Polarity] Non-Inverting
> [Model File] proc.typ proc.min proc.max
> [Vinl] 0
> [Vinh] 3.3
>
> [Model] bd4t
> [Model type] I/O
> [Polarity] Non-Inverting
> [Model File] proc.typ proc.min proc.max
> [sim time] 10n
> [C_comp] 2.0pF 3.0pF 1.0pF
> [Rising waveform] 50 0 NA NA NA NA NA NA NA
> [Falling waveform] 50 3.3 NA NA NA NA NA NA NA
> [Vmeas] 1.5V
> [Cref] 10pf
> [Vref] 0V
>
> ::::::::::::::
> bd4t.sp
> ::::::::::::::
> * input termination (TN low if active high, TN high if active low)
> *RTN TN VDD 1E9
> RTN TN 0 1E9
> RA A 0 1E9
>
> * testing spice deck for bd4t IBIS 2.1 model characterization
>
> * change the following line to your library file
> *.inc 'junk.lib'
> .global vdd gnd vpp
>
> xCKT A IO ZI TN bd4t
>
> .subckt bd4t a io zi tn
> xnd1 a tn n1 nand
> xnd2 n1 tn n2 nand
> xiv1 n2 n3 inv
> mpio io n1 vdd vdd p w=60u l=1u m=1
> mnio io n3 gnd gnd n w=30u l=1u m=1
> xiv2 n4 zi inv
> xiv3 io n4 inv
> .ends bd4t
>
> .subckt nand a b z
> mpa z a vdd vdd p w=6u l=1u m=1
> mpb z b vdd vdd p w=6u l=1u m=1
> mna z a mid gnd n w=3u l=1u m=1
> mnb mid b gnd gnd n w=3u l=1u m=1
> .ends nand
>
> .subckt inv a z
> mp z a vdd vdd p w=6u l=1u m=1
> mn z a gnd gnd n w=3u l=1u m=1
> .ends inv
>
> ::::::::::::::
> proc.max
> ::::::::::::::
> .lib './junk.lib' BEST
> ::::::::::::::
> proc.min
> ::::::::::::::
> .lib './junk.lib' WORST
> ::::::::::::::
> proc.typ
> ::::::::::::::
> .lib './junk.lib' TYPICAL
Received on Wed Oct 16 07:11:17 1996