Re: [oc] Modular FPGA board (PCI)

["Jim" <johnsonw10@hotmail.com>]

> Chaps,
>
> Just to make sure you're aware that Virtex-E devices are NOT 5V
> tolerant, and should therefore not be used in a 33Mhz 5V PCI slot. This
> may not be an issue in embedded apps, but
> only Virtex (1) devices have the correct IO buffer for full spec
> compliance.
>

I would suggest 5-v tolerant buffers always be used between FPGA's and the
outside world. It is much easier and cheaper to replace a $1 buffer chip
than a $100 FPGA if for any reason damages would occur due to the I/O
incompatibility.

Jim


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