PIC24FJ128GB MICROCHIP [Microchip Technology], PIC24FJ128GB Datasheet - Page 249
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PIC24FJ128GB
Manufacturer Part Number
PIC24FJ128GB
Description
64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC24FJ128GB.pdf
(328 pages)
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20.3
There are four registers used to control programmable
CRC operation:
• CRCCON
• CRCXOR
• CRCDAT
• CRCWDAT
REGISTER 20-1:
© 2008 Microchip Technology Inc.
bit 15
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 15-14
bit 13
bit 12-8
bit 7
bit 6
bit 5
bit 4
bit 3-0
CRCFUL
U-0
R-0
—
Registers
Unimplemented: Read as ‘0’
CSIDL: CRC Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
VWORD4:VWORD0: Pointer Value bits
Indicates the number of valid words in the FIFO. Has a maximum value of 8 when PLEN3:PLEN0 > 7,
or 16 when PLEN3:PLEN0
CRCFUL: FIFO Full bit
1 = FIFO is full
0 = FIFO is not full
CRCMPT: FIFO Empty Bit
1 = FIFO is empty
0 = FIFO is not empty
Unimplemented: Read as ‘0’
CRCGO: Start CRC bit
1 = Start CRC serial shifter
0 = CRC serial shifter turned off
PLEN3:PLEN0: Polynomial Length bits
Denotes the length of the polynomial to be generated minus 1.
CRCMPT
U-0
R-1
—
CRCCON: CRC CONTROL REGISTER
W = Writable bit
‘1’ = Bit is set
CSIDL
R/W-0
U-0
—
≤
7.
VWORD4
PIC24FJ256GB110 FAMILY
CRCGO
R/W-0
R-0
Preliminary
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
VWORD3
PLEN3
R/W-0
R-0
VWORD2
PLEN2
R/W-0
R-0
x = Bit is unknown
VWORD1
PLEN1
R/W-0
R-0
DS39897B-page 247
VWORD0
PLEN0
R/W-0
R-0
bit 8
bit 0
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