Microchip Technology AC164139 Data Sheet
2010 Microchip Technology Inc.
DS39969B-page 301
PIC24FJ256DA210 FAMILY
REGISTER 21-2:
CRCCON2: CRC CONTROL 2 REGISTER
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
DWIDTH4
DWIDTH3
DWIDTH2
DWIDTH1
DWIDTH0
bit 15
bit 8
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
PLEN4
PLEN3
PLEN2
PLEN1
PLEN0
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-13
Unimplemented: Read as ‘0’
bit 12-8
DWIDTH<4:0>: Data Word Width Configuration bits
Configures the width of the data word (data word width – 1).
Configures the width of the data word (data word width – 1).
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
PLEN<4:0>: Polynomial Length Configuration bits
Configures the length of the polynomial (polynomial length – 1).
Configures the length of the polynomial (polynomial length – 1).
REGISTER 21-3:
CRCXORL: CRC XOR POLYNOMIAL REGISTER, LOW BYTE
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
X15
X14
X13
X12
X11
X10
X9
X8
bit 15
bit 8
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
U-0
X7
X6
X5
X4
X3
X2
X1
—
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15-1
X<15:1>: XOR of Polynomial Term x
n
Enable bits
bit 0
Unimplemented: Read as ‘0’