PIC18F2480_09 Datasheet, PDF (308/490 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PIC18F2480/2580/4480/4580
24.2.3.2 Message Acceptance Filters
and Masks
This section describes the message acceptance filters
and masks for the CAN receive buffers.
REGISTER 24-37: RXFnSIDH: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER
REGISTERS, HIGH BYTE [0 ≤ n ≤ 15]⁽¹⁾
R/W-x
SID10
bit 7
R/W-x
SID9
R/W-x
SID8
R/W-x
SID7
R/W-x
SID6
R/W-x
SID5
R/W-x
SID4
R/W-x
SID3
bit 0
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
bit 7-0
SID<10:3>: Standard Identifier Filter bits (if EXIDEN = 0)
Extended Identifier Filter bits, EID<28:21> (if EXIDEN = 1).
Note 1: Registers, RXF6SIDH:RXF15SIDH, are available in Mode 1 and 2 only.
REGISTER 24-38: RXFnSIDL: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER
REGISTERS, LOW BYTE [0 ≤ n ≤ 15]⁽¹⁾
R/W-x
SID2
bit 7
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 0
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
bit 7-5
bit 4
bit 3
bit 2
bit 1-0
SID<2:0>: Standard Identifier Filter bits (if EXIDEN = 0)
Extended Identifier Filter bits, EID<20:18> (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’
EID<17:16>: 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.
DS39637D-page 308
© 2009 Microchip Technology Inc.