When a bit in this bus is 1, it indicates that after the corresponding lane was word
boundary synchronized, a CRC32 error was detected. This output is asserted for one clock
period each time a CRC32 error is detected.
Note: CRC32
errors do not affect word boundary synchronization. They are only reported as status
indicators. Keep a count of how many CRC32 errors were detected for each lane to
examine the health of each individual lane over a period of time. The checking of
the Diagnostic Word only checks the CRC32 and does not check whether or not the
unused bits of the Diagnostic Word, 57:34, are 0s as described in the
specification.