31.2.7.2 CRC Accumulator Topology

Other CRC modules have functions that support two selectable accumulator topologies. The topologies differ based on if PLEN+1 has trailing zeros in the byte stream or not. FCR’s CRC topology does not have “extra” trailing zeros in its messages.

The LFSR Topology is specific to Flash-based communications and not streaming data. Thus this topology is used in this device. Its topology is shown in the following figure.