PIC18F2480 MICROCHIP [Microchip Technology], PIC18F2480 Datasheet - Page 296

• Manufacturer Part Number: PIC18F2480
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2480/2580/4480/4580
23.2.3.1
The ECAN module contains 6 message buffers that can
be programmed as transmit or receive buffers. Any of
these buffers can also be programmed to automatically
handle RTR messages.
REGISTER 23-22: BnCON: TX/RX BUFFER n CONTROL REGISTERS IN RECEIVE MODE
DS39637A-page 294
Note:
bit 7
bit 6
bit 5
bit 4-0
These registers are not used in Mode 0.
Programmable TX/RX and
Auto-RTR Buffers
[0
bit 7
Legend:
R = Readable bit
-n = Value at POR
RXFUL: Receive Full Status bit
1 = Receive buffer contains a received message
0 = Receive buffer is open to receive a new message
RXM1: Receive Buffer Mode bit
1 = Receive all messages including partial and invalid (acceptance filters are ignored)
0 = Receive all valid messages as per acceptance filters
RXRTRRO: Read-Only Remote Transmission Request for Received Message bit
1 = Received message is a remote transmission request
0 = Received message is not a remote transmission request
FILHIT4:FILHIT0: Filter Hit bits
These bits indicate which acceptance filter enabled the last message reception into this buffer.
01111 = Acceptance Filter 15 (RXF15)
01110 = Acceptance Filter 14 (RXF14)
...
00001 = Acceptance Filter 1 (RXF1)
00000 = Acceptance Filter 0 (RXF0)
RXFUL
R/W-0
Note 1: These registers are available in Mode 1 and 2 only.
n
(2)
2: This bit is set by the CAN module upon receiving a message and must be cleared
5, TXnEN (BSEL0<n>) = 0]
by software after the buffer is read. As long as RXFUL is set, no new message will
be loaded and the buffer will be considered full.
R/W-0
RXM1
RXRTRRO
W = Writable bit
‘1’ = Bit is set
R-0
Preliminary
(2)
FILHIT4
R-0
(1)
FILHIT3
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R-0
FILHIT2
R-0
 2004 Microchip Technology Inc.
x = Bit is unknown
FILHIT1
R-0
FILHIT0
R-0
bit 0