Data Sheet

300
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Table 19-4. CRC Polynomial Type
z Bits 1:0 – CRCBEATSIZE[1:0]: CRC Beat Size
These bits define the size of the data transfer for each bus access when the CRC is used with I/O interface, as
shown in Table 19-5.
Table 19-5. CRC Beat Size
CRCPOLY[1:0] Name Description
0x0 CRC16 CRC-16 (CRC-CCITT)
0x1 CRC32 CRC32 (IEEE 802.3)
0x2-0x3 Reserved
CRCBEATSIZE[1:0] Name Description
0x0 BYTE Byte bus access
0x1 HWORD Half-word bus access
0x2 WORD Word bus access
0x3 Reserved