Datasheet
PIC18F66K80 FAMILY
DS39977F-page 414 2010-2012 Microchip Technology Inc.
REGISTER 27-23: BnCON: TX/RX BUFFER ‘n’ CONTROL REGISTERS IN TRANSMIT MODE
[0 n 5, TXnEN (BSEL0<n>) = 1]
(1)
R/W-0 R-0 R-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0
TXBIF
(3)
TXABT
(3)
TXLARB
(3)
TXERR
(3)
TXREQ
(2,4)
RTREN TXPRI1
(5)
TXPRI0
(5)
bit 7 bit 0
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
bit 7
TXBIF: Transmit Buffer Interrupt Flag bit
(3)
1 = A message was successfully transmitted
0 = No message was transmitted
bit 6
TXABT: Transmission Aborted Status bit
(3)
1 = Message was aborted
0 = Message was not aborted
bit 5
TXLARB: Transmission Lost Arbitration Status bit
(3)
1
= Message lost arbitration while being sent
0 = Message did not lose arbitration while being sent
bit 4
TXERR: Transmission Error Detected Status bit
(3)
1 = A bus error occurred while the message was being sent
0 = A bus error did not occur while the message was being sent
bit 3
TXREQ: Transmit Request Status bit
(2,4)
1 = Requests sending a message; clears the TXABT, TXLARB and TXERR bits
0 = Automatically cleared when the message is successfully sent
bit 2
RTREN: Automatic Remote Transmission Request Enable bit
1 = When a remote transmission request is received, TXREQ will be automatically set
0 = When a remote transmission request is received, TXREQ will be unaffected
bit 1-0
TXPRI<1:0>: Transmit Priority bits
(5)
11 = Priority Level 3 (highest priority)
10 = Priority Level 2
01 = Priority Level 1
00 = Priority Level 0 (lowest priority)
Note 1: These registers are available in Mode 1 and 2 only.
2: Clearing this bit in software while the bit is set will request a message abort.
3: This bit is automatically cleared when TXREQ is set.
4: While TXREQ is set or a transmission is in progress, Transmit Buffer registers remain read-only.
5: These bits set the order in which the Transmit Buffer register will be transferred. They do not alter the CAN
message identifier.