If you look to
http://www.latticesemi.com/documents/TN1202.pdf
page 10-5, table 10-3 footnotes:
1. PCI33 is supported at the bottom bank of MachXO2-640U,
MachXO2-1200/U, MachXO2-2000/U, MachXO2-4000,
and MachXO2-7000 devices.
You can luckily get a 3.3V pci support on one specific bank (2) in few
specific devices.
Also see:
http://www.latticesemi.com/support/faqs/details.cfm?id=1758
On 11/09/2012 10:26 AM, michele wrote:
On Thu, Nov 08, 2012 at 09:53:24PM +0100, "Ing. Daniel Rozsnyó" wrote:
You might read the datasheet again, as I was told, the device can
connect to the PCI bus only by one specific io bank (bank 2?) - only
those pins contain the protection diodes.
Thank you, checking...
And - do you really need 5V tolerance? Those ports are today hard to find.
All pc mother board looks to be 5V
None of the recent high-density components are 5V tolerant anymore.
Find some external components to translate voltages.. TI offers many of
them, if you use a dual-powered chip, you might wire the pci's VCCIO to
one side, and you 3.3v to other side of the translator.
Michele Carla'
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