PIC32MX440F256H-80I Datasheet, PDF (212/646 Pages) Microchip Technology – 64/100-Pin General Purpose and USB 32-Bit Flash Microcontrollers

PIC32MX3XX/4XX
REGISTER 10-4: DCRCCON: DMA CRC CONTROL REGISTER
r-x
r-x
r-x
r-x
r-x
r-x
r-x
r-x
—
—
—
—
—
—
—
—
bit 31
bit 24
r-x
—
bit 23
r-x
r-x
r-x
r-x
r-x
r-x
r-x
—
—
—
—
—
—
—
bit 16
r-x
—
bit 15
r-x
r-x
r-x
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
PLEN<3:0>
bit 8
R/W-0
R/W-0
r-x
r-x
r-x
r-x
R/W-0
R/W-0
CRCEN
CRCAPP
—
—
—
—
CRCCH<1:0>
bit 7
bit 0
Legend:
R = Readable bit
U = Unimplemented bit
W = Writable bit
P = Programmable bit
-n = Bit Value at POR: (‘0’, ‘1’, x = Unknown)
r = Reserved bit
bit 31-12
bit 11-8
bit 7
bit 6
bit 5-2
bit 1-0
Reserved: Write ‘0’; ignore read
PLEN<3:0>: Polynomial Length bits
Denotes the length of the polynomial –1.
CRCEN: CRC Enable bit
1 = CRC module is enabled and channel transfers are routed through the CRC module
0 = CRC module is disabled and channel transfers proceed normally
CRCAPP: CRC Append Mode bit
1 = Data read will be passed to the CRC, to be included in the CRC calculation, but is not written to
the destination register. When a block transfer completes, the calculated CRC will be written to
the location given by DCHxDSA
0 = Channel behaves normally, with the CRC being calculated as data is transferred from the source
to the destination
Reserved: Write ‘0’; ignore read
CRCCH<1:0>: CRC Channel Select bits
11 = CRC is assigned to Channel 3
10 = CRC is assigned to Channel 2
01 = CRC is assigned to Channel 1
00 = CRC is assigned to Channel 0
DS61143E-page 210
Preliminary
© 2008 Microchip Technology Inc.