PIC18F458T-I/PT Microchip Technology, PIC18F458T-I/PT Datasheet - Page 208

• Manufacturer Part Number: PIC18F458T-I/PT
• Description: IC MCU FLASH 16KX16 W/CAN 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F458T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.2.2
This section describes the CAN Transmit Buffer
registers and their associated control registers.
REGISTER 19-4:
DS41159E-page 206
PIC18FXX8
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1-0
CAN TRANSMIT BUFFER
REGISTERS
TXBnCON: TRANSMIT BUFFER n CONTROL REGISTERS
bit 7
Legend:
R = Readable bit
-n = Value at POR
Unimplemented: Read as ‘0’
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)
Note:
Note:
U-0
—
Clearing this bit in software while the bit is set will request a message abort.
These bits set the order in which the Transmit Buffer will be transferred. They do
not alter the CAN message identifier.
TXABT
R-0
TXLARB
W = Writable bit
‘1’ = Bit is set
R-0
TXERR
R-0
TXREQ
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U-0
—
© 2006 Microchip Technology Inc.
x = Bit is unknown
TXPRI1
R/W-0
TXPRI0
R/W-0
bit 0