PIC18FXX8 Datasheet, PDF (217/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PIC18FXX8
19.2.3.1 Message Acceptance Filters and
Masks
This subsection describes the message acceptance
filters and masks for the CAN receive buffers.
REGISTER 19-21: RXFnSIDH: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER,
HIGH BYTE REGISTERS
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID10
SID9
SID8
SID7
SID6
SID5
SID4
SID3
bit 7
bit 0
bit 7-0
SID10:SID3: Standard Identifier Filter bits if EXIDEN = 0 or
Extended Identifier Filter bits EID28:EID21 if EXIDEN = 1
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
REGISTER 19-22: RXFnSIDL: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER,
LOW BYTE REGISTERS
R/W-x R/W-x R/W-x
U-0
R/W-x
U-0
R/W-x R/W-x
SID2
SID1
SID0
—
EXIDEN
—
EID17 EID16
bit 7
bit 0
bit 7-5
bit 4
bit 3
bit 2
bit 1-0
SID2:SID0: Standard Identifier Filter bits if EXIDEN = 0 or
Extended Identifier Filter bits EID20:EID18 if EXIDEN = 1
Unimplemented: Read as ‘0’
EXIDEN: Extended Identifier Filter Enable bit
1 = Filter will only accept extended ID messages
0 = Filter will only accept standard ID messages
Unimplemented: Read as ‘0’
EID17:EID16: Extended Identifier Filter bits
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
 2004 Microchip Technology Inc.
DS41159D-page 215