31.2.9.4 Simple Parity Error - 128/256-bit

When Dynamic ECC is active and the read is from an address where CTL selects simple parity, a parity error causes the same behavior as an ECC DED. The error is reported in-band (if ECCCTL[1:0]= 2’b01) and the FFLTSYN.DSERR bit is set.

Unlike a DED, a Bus Error exception is not returned to the initiator.