Microchip Technology DM164134 Hoja De Datos
© 2006 Microchip Technology Inc.
DS41159E-page 215
PIC18FXX8
19.2.3.1
Message Acceptance Filters and
Masks
Masks
This subsection describes the message acceptance
filters and masks for the CAN receive buffers.
filters and masks for the CAN receive buffers.
REGISTER 19-21: RXFnSIDH: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER,
HIGH BYTE REGISTERS
REGISTER 19-22: RXFnSIDL: RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER,
LOW 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
Extended Identifier Filter bits EID28:EID21 if EXIDEN = 1
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
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
SID2:SID0: Standard Identifier Filter bits if EXIDEN = 0 or
Extended Identifier Filter bits EID20:EID18 if EXIDEN = 1
Extended Identifier Filter bits EID20:EID18 if EXIDEN = 1
bit 4
Unimplemented: Read as ‘0’
bit 3
EXIDEN: Extended Identifier Filter Enable bit
1
= Filter will only accept extended ID messages
0
= Filter will only accept standard ID messages
bit 2
Unimplemented: Read as ‘0’
bit 1-0
EID17:EID16: Extended Identifier Filter bits
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown