From: Bo (email@example.com)
Date: Tue Oct 10 2000 - 09:51:16 PDT
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.
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