PIC18FXX8 Datasheet, PDF (213/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PIC18FXX8
REGISTER 19-13: RXB1CON: RECEIVE BUFFER 1 CONTROL REGISTER
R/C-0 R/W-0 R/W-0
RXFUL⁽¹⁾ RXM1⁽¹⁾ RXM0⁽¹⁾
U-0
R-0
R-0
— RXRTRRO FILHIT2
bit 7
R-0
FILHIT1
R-0
FILHIT0
bit 0
bit 7
bit 6-5
bit 4
bit 3
bit 2-0
RXFUL: Receive Full Status bit⁽¹⁾
1 = Receive buffer contains a received message
0 = Receive buffer is open to receive a new message
Note: This bit is set by the CAN module and should be cleared by software after the buffer
is read.
RXM1:RXM0: Receive Buffer Mode bits⁽¹⁾
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 1: Bits RXFUL, RXM1 and RXM0 of RXB1CON are not mirrored in RXB0CON.
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
C = Clearable bit
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
x = Bit is unknown
 2004 Microchip Technology Inc.
DS41159D-page 211