Fwd: PCI-X Compatibility

["Vashek Weis" <vashek@ast.co.il> (by way of Daniel Weaver <dan.weaver@znyx.com>)]

Hi,
This is a technology limitation, nothing to do with the PCI-X spec. The new 
0.18uM process cannot be 5 volt tolerant. Only 0.25uM or older process can 
be 5 volt tolerant. PCI-X as well as PCI 2.3 is NOT 5 volt tolerant.
Vashek
========

>Date: Tue, 25 Jun 2002 07:45:13 -0400
>From: Markou, Pete <Pete.Markou@GDC4S.Com>
>Subject: PCI-X Compatibility
>To: pci-sig@znyx.com <pci-sig@znyx.com>
>
>We are thinking of using a vendor's ASIC which has a PCI-X interface. The 
>ASIC is a .18uM process with a core voltage of 1.8 volts and I/O voltage 
>of 3.3 volts. Our product has to be backwards compatible with some legacy 
>equipment that uses a 5 volt signaling environment. My question is, can a 
>PCI-X interface be used on a 5 volt PCI 33Mhz/32 bit bus or is PCI-X only 
>compatible with a 3.3 volt signaling environment?
>
>Thanks,
>Peter

========
Vashek Weis
Standard Products FAE

Advanced Semiconductor Technology Ltd.
3 Hazan St., Ra'anana, 43563, Israel
Tel: 972-9-7744278 Ext. 332
Mobile: 972-52-325-355
Fax: 972-9-7744499

http://www.ast.co.il
mailto:vashek@ast.co.il
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