PIC18F2480_09 Datasheet, PDF (301/490 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PIC18F2480/2580/4480/4580
REGISTER 24-23: BnCON: TX/RX BUFFER n CONTROL REGISTERS IN TRANSMIT MODE
[0 ≤ n ≤ 5, TXnEN (BSEL0<n>) = 1]⁽¹⁾
R/W-0
TXBIF⁽³⁾
bit 7
R-0
TXABT⁽³⁾
R-0
TXLARB⁽³⁾
R-0
R/W-0
TXERR⁽³⁾ TXREQ^(2,4)
R/W-0
RTREN
R/W-0
TXPRI1⁽⁵⁾
R/W-0
TXPRI0⁽⁵⁾
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1-0
TXBIF: Transmit Buffer Interrupt Flag bit⁽³⁾
1 = A message is successfully transmitted
0 = No message was transmitted
TXABT: Transmission Aborted Status bit⁽³⁾
1 = Message was aborted
0 = Message was not aborted
TXLARB: Transmission Lost Arbitration Status bit⁽³⁾
1 = Message lost arbitration while being sent
0 = Message did not lose arbitration while being sent
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
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
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
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:
2:
3:
4:
5:
These registers are available in Mode 1 and 2 only.
Clearing this bit in software while the bit is set will request a message abort.
This bit is automatically cleared when TXREQ is set.
While TXREQ is set or a transmission is in progress, Transmit Buffer registers remain read-only.
These bits set the order in which the Transmit Buffer register will be transferred. They do not alter the CAN
message identifier.
© 2009 Microchip Technology Inc.
DS39637D-page 301