PIC18F6585 Datasheet, PDF (308/496 Pages) Microchip Technology – 64/68/80-Pin High-Performance, 64-Kbyte Enhanced Flash Microcontrollers with ECAN Module

PIC18F6585/8585/6680/8680
23.2.3.2 Message Acceptance Filters
and Masks
This subsection describes the message acceptance
filters and masks for the CAN receive buffers.
Note: These registers are writable in
Configuration mode only.
REGISTER 23-37: RXFnSIDH: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER
REGISTERS, HIGH BYTE [0 ≤ n ≤ 15]⁽¹⁾
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;
Extended Identifier Filter bits EID28:EID21, if EXIDEN = 1.
Note 1: Registers RXF6SIDH:RXF15SIDH are available in Mode 1 and 2 only.
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 23-38: RXFnSIDL: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER
REGISTERS, LOW BYTE [0 ≤ n ≤ 15]⁽¹⁾
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;
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
Note: In Mode 0, this bit must be set/cleared as required, irrespective of corresponding
mask register value.
Unimplemented: Read as ‘0’
EID17:EID16: Extended Identifier Filter bits
Note 1: Registers RXF6SIDL:RXF15SIDL are available in Mode 1 and 2 only.
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 306
 2004 Microchip Technology Inc.