The IP Compiler for PCI Express
should be asserted to indicate an uncorrectable ECC error on virtual
channel 0. However, this signal toggles frequently when no error
is present, and toggles even if the ECC encoder and decoder are
This issue affects all IP Compiler for PCI Express HIP variations that target a Cyclone IV device.
To work around this issue, ensure that your design ignores
the IP Compiler for PCI Express
r2c_err0 signal output
from the affected variations.
This issue is fixed in version 11.1 of the IP Compiler for PCI Express.