Can you confirm what value the internal pulldown is on the EXT_ARB_EN on the XIO2001 PCIe-to-PCI Bridge per the following information from the Datasheet?
"Note: The EXT_ARB_EN input buffer has an internal active pulldown. This pulldown is active at all times"
It behaves like a floating (or near floating) input ... and is very sensitive to any noise or temperature change.
FYI - I was told to post this on this forum. If it should be in another forum please let me know.
Thanks,
Bob Fitch