Honored ContributorI was wondering if anyone has connected an FPGA and a PCI/Mini-pci Card with the IO standard set as 3.3V LVTTL instead of 3.3 PCI? PCI is still a 3.3V standard, but I'm not sure if the drivers are physically different in hte FPGA?
Thanks ,J
Honored Contributor
thanks ,j
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--- Quote End --- I did use 3.3 LVTTL for onboard PCI. Thought the drive chart is different. There is no problem at 33MHz.
Honored Contributoron-board meaning you didn't use an expansion card.. the interface was contained on the board? How far away was the device?
Honored Contributor<div align='right'><{post_snapback}> (index.php?act=findpost&pid=16133)
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--- Quote End --- About 2-4 inches from the fpga. I think a single mini-pci socket should be OK. But if you want to drive several PCI slots, you would better use PCI capable pins.
Honored Contributordid you use external components within the pci lines - as resistors to limit current or external clamping-diodes?
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--- Quote End --- I use minimum current strength for most pins, including onboard ddr sdram and others. I didn't use series resisters or clamping diodes.
Honored Contributorseries resistors on a PCI bus would suck if you were 1 inch out http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/smile.gif
