PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 211

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

REGISTER 19-13: RXB1CON – RECEIVE BUFFER 1 CONTROL REGISTER
REGISTER 19-14: RXBnSIDH – RECEIVE BUFFER n STANDARD IDENTIFIER, HIGH BYTE
 2002 Microchip Technology Inc.
bit 7-0
bit 7
bit 6-5
bit 4
bit 3
bit 2-0
REGISTER
bit 7
bit 7
RXFUL: Receive Full Status bit
1 = Receive buffer contains a received message
0 = Receive buffer is open to receive a new message
Note:
RXM1:RXM0: Receive Buffer Mode bits
11 = Receive all messages (including those with errors)
10 = Receive only valid messages with extended identifier
01 = Receive only valid messages with standard identifier
00 = Receive all valid messages
Unimplemented: Read as ’0’
RXRTRRO: Receive Remote Transfer Request bit (read only)
1 = Remote transfer request
0 = No remote transfer request
FILHIT2:FILHIT0: Filter Hit bits
These bits indicate which acceptance filter enabled the last message reception into Receive
Buffer 1
111 = Reserved
110 = Reserved
101 = Acceptance Filter 5 (RXF5)
100 = Acceptance Filter 4 (RXF4)
011 = Acceptance Filter 3 (RXF3)
010 = Acceptance Filter 2 (RXF2)
001 = Acceptance Filter 1 (RXF1) only possible when RXB0DBEN bit is set
000 = Acceptance Filter 0 (RXF0) only possible when RXB0DBEN bit is set
Note
SID10:SID3: Standard Identifier bits, if EXID = 0 (RXBnSIDL Register)
Extended Identifier bits EID28:EID21, if EXID = 1
Legend:
R = Readable bit
- n = Value at POR
RXFUL
Legend:
R = Readable bit
- n = Value at POR
R/W-x
SID10
R/C-0
(1)
1: Bits RXFUL, RXM1 and RXM0 of RXB1CON are not mirrored in RXB0CON.
This bit is set by the CAN module and should be cleared by software after the buffer
is read.
RXM1
R/W-0
R/W-x
SID9
(1)
RXM0
W = Writable bit
’1’ = Bit is set
W = Writable bit
’1’ = Bit is set
R/W-0
R/W-x
SID8
Preliminary
(1)
(1)
R/W-x
SID7
U-0
—
(1)
RXRTRRO
R/W-x
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
SID6
R-0
FILHIT2
R/W-x
SID5
R-0
PIC18FXX8
x = Bit is unknown
x = Bit is unknown
FILHIT1
R/W-x
SID4
R-0
DS41159B-page 209
FILHIT0
R/W-x
SID3
R-0
bit 0
bit 0