PIC18F6585 Datasheet, PDF (280/496 Pages) Microchip Technology – 64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module

PIC18F6585/8585/6680/8680
REGISTER 23-1: CANCON: CAN CONTROL REGISTER
R/W-1
R/W-0
R/W-0
R/S-0
R/W-0
R/W-0
R/W-0
U-0
Mode 0
REQOP2 REQOP1 REQOP0 ABAT
WIN2
WIN1
WIN0
—
R/W-1 R/W-0 R/W-0 R/S-0
U-0
U-0
U-0
U-0
Mode 1
REQOP2 REQOP1 REQOP0 ABAT
—
—
—
—
R/W-1 R/W-0 R/W-0 R/S-0
R-0
R-0
R-0
R-0
Mode 2
REQOP2 REQOP1 REQOP0 ABAT
FP3
FP2
FP1
FP0
bit 7
bit 0
bit 7-5
bit 4
bit 3-1
bit 0
bit 3-0
REQOP2:REQOP0: Request CAN Operation Mode bits
1xx = Request Configuration mode
011 = Request Listen Only mode
010 = Request Loopback mode
001 = Request Disable mode
000 = Request Normal mode
ABAT: Abort All Pending Transmissions bit
1 = Abort all pending transmissions (in all transmit buffers)
0 = Transmissions proceeding as normal
Mode 0:
WIN2:WIN0: Window Address bits
This selects which of the CAN buffers to switch into the access bank area. This allows access
to the buffer registers from any data memory bank. After a frame has caused an interrupt, the
ICODE2:ICODE0 bits can be copied to the WIN2:WIN0 bits to select the correct buffer. See
Example 23-2 for a code example.
111 = Receive Buffer 0
110 = Receive Buffer 0
101 = Receive Buffer 1
100 = Transmit Buffer 0
011 = Transmit Buffer 1
010 = Transmit Buffer 2
001 = Receive Buffer 0
000 = Receive Buffer 0
Unimplemented: Read as ‘0’
Mode 1:
Unimplemented: Read as ‘0’
Mode 2:
FP3:FP0: FIFO Read Pointer bits
These bits point to the message buffer to be read.
0111:0000 = Message buffer to be read
1111:1000 = Reserved
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
DS30491C-page 278
 2004 Microchip Technology Inc.