2011-2012 Microchip Technology Inc.
Preliminary
DS61168D-page 109
PIC32MX1XX/2XX
bit 6
CRCAPP: CRC Append Mode bit(1)
1 = The DMA transfers data from the source into the CRC but NOT to the destination. When a block transfer
completes the DMA writes the calculated CRC value to the location given by CHxDSA
0 = The DMA transfers data from the source through the CRC obeying WBO as it writes the data to the
destination
bit 5
CRCTYP: CRC Type Selection bit
1 = The CRC module will calculate an IP header checksum
0 = The CRC module will calculate a LFSR CRC
bit 4-3
Unimplemented: Read as ‘0’
bit 2-0
CRCCH<2:0>: CRC Channel Select bits
111 = CRC is assigned to Channel 7
110 = CRC is assigned to Channel 6
101 = CRC is assigned to Channel 5
100 = CRC is assigned to Channel 4
011 = CRC is assigned to Channel 3
010 = CRC is assigned to Channel 2
001 = CRC is assigned to Channel 1
000 = CRC is assigned to Channel 0
REGISTER 9-4:
DCRCCON: DMA CRC CONTROL REGISTER (CONTINUED)
Note 1: When WBO = 1, unaligned transfers are not supported and the CRCAPP bit cannot be set.
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