RE: [SI-LIST] : Information on the I/O pads

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From: George Borkowicz (jbor@nortelnetworks.com)
Date: Tue Oct 10 2000 - 11:23:45 PDT


Bo,

From where I'm standing it looks like an IBM asic I/O cell.
Get the data sheet for the appropriate process (I believe
available on line) and you will find all these signals well
documented. However, if this indeed is the case (IBM)
be aware that you will also need a model for the clamp
circuit which is a separate (and also encrypted) file.

gjb

> -----Original Message-----
> From: Bo [SMTP:bo_pfc@yahoo.com]
> Sent: Tuesday, October 10, 2000 12:51 PM
> To: si-list@silab.eng.sun.com
> Subject: [SI-LIST] : Information on the I/O pads
>
> Hi,
>
> Recently I received models of the I/O pads from an ASIC vendor.
> Unfortunately
> the models were encrypted and without any documentation. I have tried to
> get
> documentation from the vendor but have been unable to. It seems that they
> have
> used these pads from a third party and have no clue how the pads work. I
> would
> be greatfull if someone could tell me what each pin might be. Here is the
> list
> of all the pins:
>
> GND VDD A DI LT PAD PADN RG RI TS VDD250 Z ZDI ZRI
>
> I have made guess on these pins(it is differential buffer that I know):
> GND - Ground
> VDD - Power supply
> A - Input to the pad from the core
> PAD & PADN - Outputs from the pad to the package of the chip
> VDD250 - Probably 2.5 Supply
>
> TS - Probably something to do with tristating the buffer
>
> Could someone please help me in determining what other pins represent.
> Any
> answers or suggestions will be greatly appreciated.
>
> Regards,
> Bo
>
>
>
>
>
>
>
>
>
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