PIC18F25K80 MICROCHIP [Microchip Technology], PIC18F25K80 Datasheet - Page 404
PIC18F25K80
Manufacturer Part Number
PIC18F25K80
Description
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F25K80.pdf
(628 pages)
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PIC18F66K80 FAMILY
27.2.2
This section describes the dedicated CAN Transmit
Buffer registers and their associated control registers.
REGISTER 27-5:
DS39977C-page 404
Mode 0
Mode 1,2
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1-0
Note 1:
2:
3:
This bit is automatically cleared when TXREQ is set.
While TXREQ is set, Transmit Buffer registers remain read-only. Clearing this bit in software while the bit is
set will request a message abort.
These bits define the order in which transmit buffers will be transferred. They do not alter the CAN
message identifier.
DEDICATED CAN TRANSMIT
BUFFER REGISTERS
bit 7
TXBIF: Transmit Buffer Interrupt Flag bit
1 = Transmit buffer has completed transmission of a 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 ’
TXPRI<1:0>: Transmit Priority bits
11 = Priority Level 3 (highest priority)
10 = Priority Level 2
01 = Priority Level 1
00 = Priority Level 0 (lowest priority)
TXBIF
TXBIF
R/C-0
U-0
TXBnCON: TRANSMIT BUFFER n CONTROL REGISTERS [0 n 2]
TXABT
TXABT
R-0
R-0
(1)
(1)
C = Clearable bit
W = Writable bit
‘1’ = Bit is set
TXLARB
TXLARB
R-0
R-0
(3)
(2)
(1)
(1)
Preliminary
(1)
TXERR
TXERR
R-0
R-0
(1)
(1)
(1)
(1)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
TXREQ
TXREQ
R/W-0
R/W-0
(2)
(2)
U-0
U-0
—
—
2011 Microchip Technology Inc.
x = Bit is unknown
TXPRI1
TXPRI1
R/W-0
R/W-0
(3)
(3)
TXPRI0
TXPRI0
R/W-0
R/W-0
bit 0
(3)
(3)
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