PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 214

• Manufacturer Part Number: PIC18F258
• Description: High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18FXX8
REGISTER 19-20: RXERRCNT – RECEIVE ERROR COUNT REGISTER
19.2.3.1
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,
REGISTER 19-22: RXFnSIDL – RECEIVE ACCEPTANCE FILTER n STANDARD IDENTIFIER FILTER,
DS41159B-page 212
bit 7-0
bit 7-5
bit 4
bit 3
bit 2
bit 1-0
bit 7-0
Message Acceptance Filters and
Masks
HIGH BYTE
LOW BYTE
bit 7
bit 7
Legend:
R = Readable bit
- n = Value at POR
Legend:
R = Readable bit
- n = Value at POR
bit 7
SID10:SID3: Standard Identifier Filter bits, if EXIDEN = 0
Extended Identifier Filter bits EID28:EID21, if EXIDEN = 1
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
Unimplemented: Read as ’0’
EID17:EID16: Extended Identifier Filter bits
REC7:REC0: Receive Error Counter bits
This register contains the Receive Error value as defined by the CAN specifications.
When RXERRCNT > 127, the module will go into an error passive state. RXERRCNT does not
have the ability to put the module in “Bus-Off” state.
Legend:
R = Readable bit
- n = Value at POR
SID10
R/W-x
R/W-x
REC7
SID2
R-0
R/W-x
R/W-x
REC6
SID1
SID9
R-0
W = Writable bit
’1’ = Bit is set
W = Writable bit
’1’ = Bit is set
W = Writable bit
’1’ = Bit is set
R/W-x
R/W-x
REC5
SID0
SID8
Preliminary
R-0
R/W-x
REC4
SID7
U-0
R-0
—
EXIDEN
R/W-x
R/W-x
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
REC3
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
SID6
R-0
R/W-x
REC2
SID5
U-0
R-0
—
 2002 Microchip Technology Inc.
x = Bit is unknown
x = Bit is unknown
x = Bit is unknown
EID17
R/W-x
R/W-x
REC1
SID4
R-0
R/W-x
R/W-x
EID16
REC0
SID3
R-0
bit 0
bit 0
bit 0