This bit field counts
the frames that are not an integral number of bytes long and have bad CRC when their
length is truncated to an integral number of Bytes and are between 64 and 1518 Bytes in
length (1536 if NCFGR.MAXFS=1). This register is also incremented if a symbol error is
detected and the frame is of valid length and does not have an integral number of
bytes.
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