PIC18F2480 MICROCHIP [Microchip Technology], PIC18F2480 Datasheet - Page 284

• 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
23.2.2
This section describes the dedicated CAN Transmit
Buffer registers and their associated control registers.
REGISTER 23-5:
DS39637A-page 282
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1-0
Mode 1, 2
Mode 0
DEDICATED CAN TRANSMIT
BUFFER REGISTERS
bit 7
Mode 0:
Unimplemented: Read as ‘0’
Mode 1, 2:
TXBIF: Transmit Buffer Interrupt Flag bit
1 = Transmit buffer has completed transmission of message and may be reloaded
0 = Transmit buffer has not completed transmission of a message
TXABT: Transmission Aborted Status bit
1 = Message was aborted
0 = Message was not aborted
TXLARB: Transmission Lost Arbitration Status bit
1 = Message lost arbitration while being sent
0 = Message did not lose arbitration while being sent
TXERR: Transmission Error Detected Status bit
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
1 = Requests sending a message. Clears the TXABT, TXLARB and TXERR bits.
0 = Automatically cleared when the message is successfully sent
Unimplemented: Read as ‘0’
TXPRI1:TXPRI0: Transmit Priority bits
11 = Priority Level 3 (highest priority)
10 = Priority Level 2
01 = Priority Level 1
00 = Priority Level 0 (lowest priority)
Legend:
C = Clearable bit
-n = Value at POR
TXBIF
R/C-0
Note 1: This bit is automatically cleared when TXREQ is set.
U-0
—
TXBnCON: TRANSMIT BUFFER n CONTROL REGISTERS [0
2: While TXREQ is set, Transmit Buffer registers remain read-only. Clearing this bit in
3: These bits define the order in which transmit buffers will be transferred. They do not alter
software while the bit is set will request a message abort.
the CAN message identifier.
TXABT
TXABT
R-0
R-0
(1)
(1)
R = Readable bit
‘1’ = Bit is set
TXLARB
TXLARB
R-0
R-0
Preliminary
(1)
(1)
(2)
TXERR
TXERR
(3)
(1)
R-0
R-0
W = Writable bit
‘0’ = Bit is cleared
(1)
(1)
(1)
(1)
TXREQ
TXREQ
R/W-0
R/W-0
(2)
(2)
U = Unimplemented bit, read as ‘0’
x = Bit is unknown
U-0
U-0
—
—
 2004 Microchip Technology Inc.
TXPRI1
TXPRI1
R/W-0
R/W-0
n
2]
(3)
(3)
TXPRI0
TXPRI0
R/W-0
R/W-0
bit 0
(3)
(3)