PIC18F2585_07 Datasheet, PDF (304/482 Pages) Microchip Technology – Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PIC18F2585/2680/4585/4680
23.2.3.2 Message Acceptance Filters
and Masks
This section describes the message acceptance filters
and masks for the CAN receive buffers.
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
SID2
R/W-x
SID1
R/W-x
SID0
U-0
R/W-x
U-0
—
EXIDEN⁽²⁾
—
R/W-x
EID17
R/W-x
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⁽²⁾
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
Note 1: Registers RXF6SIDL:RXF15SIDL are available in Mode 1 and 2 only.
2: In Mode 0, this bit must be set/cleared as required, irrespective of corresponding
mask register value.
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
DS39625C-page 302
Preliminary
© 2007 Microchip Technology Inc.