PIC24FJ256DA210 Datasheet, PDF (300/408 Pages) Microchip Technology – 64/100-Pin, 16-Bit Flash Microcontrollers with Graphics Controller and USB On-The-Go (OTG)

PIC24FJ256DA210 FAMILY
REGISTER 21-1: CRCCON1: CRC CONTROL 1 REGISTER
R/W-0
U-0
CRCEN
—
bit 15
R/W-0
CSIDL
R-0, HSC
VWORD4
R-0, HSC
VWORD3
R-0, HSC
VWORD2
R-0, HSC
VWORD1
R-0, HSC
VWORD0
bit 8
R-0, HSC R-1, HSC
R/W-0
R/W-0, HC
R/W-0
U-0
U-0
U-0
CRCFUL
CRCMPT CRCISEL
CRCGO
LENDIAN
—
—
—
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
HC = Hardware Cleared
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
HSC = Hardware Settable/Clearable bit
bit 15
bit 14
bit 13
bit 12-8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
CRCEN: CRC Enable bit
1 = Enables module
0 = Disables module; all state machines, pointers and CRCWDAT/CRCDATH reset; other SFRs are
NOT reset
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
VWORD<4:0>: Pointer Value bits
Indicates the number of valid words in the FIFO. Has a maximum value of 8 when PLEN<4:0>  7 or
16 when PLEN<4:0> 7.
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
CRCISEL: CRC Interrupt Selection bit
1 = Interrupt on FIFO is empty; the final word of data is still shifting through the CRC
0 = Interrupt on shift is complete and results are ready
CRCGO: Start CRC bit
1 = Start CRC serial shifter
0 = CRC serial shifter is turned off
LENDIAN: Data Shift Direction Select bit
1 = Data word is shifted into the CRC, starting with the LSb (little endian)
0 = Data word is shifted into the CRC, starting with the MSb (big endian)
Unimplemented: Read as ‘0’
DS39969B-page 300
 2010 Microchip Technology Inc.