[IBIS-Users] [Pin Mapping] for input models

Hi IBIS experts,

I have a question considering using [Pin Mapping] for input models. Question would be: how many entries should be for input buffer in for [Pin Mapping] keyword?

Specification says: "Each line must contain either three, five or six entries." (Btw., in specification there is no example for input buffer)

Format of command is: [Pin Mapping] pulldown_ref pullup_ref gnd_clamp_ref power_clamp_ref ext_ref

So if I write for example:

A1 GND VCC

There are only 3 entries, but according to format specification second and third entry are used for pulldown reference and pullup reference respective, what is a nonsense in this case, because input buffers have only power and ground clamps and no pull-up and pull down references.

If I write something like:
A1 NC NC GND VCC

This according to my opinion makes more sense, but still I have to use NC for pull-up and pull down references.

What I was able to find as an example on Internet had always 5 entries, like:
A1 GND VCC GND VCC

For me this is senseless, because, as said before, one input buffer has only power and ground clamps.

So, can somebody write me what is a proper format for input buffer in [Pin Mapping] ?

Thanks,
Radovan
 



Best regards / Mit freundlichen Grüßen / S poštovanjem
Radovan Vuletić

Infineon Technologies AG
MP PD PDE
Room 03.911
Balanstraße 73
D-81541 München

Phone:		+49 (0)89 234 20108
Fax:		+49 (0)89 234 27705
Fax (PC):	+49 (0)89 234 955 5305 

E-mail: radovan.vuletic@infineon.com

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