PIC18FXX8 Datasheet, PDF (207/402 Pages) Microchip Technology – 28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module

PIC18FXX8
REGISTER 19-3:
COMSTAT: COMMUNICATION STATUS REGISTER
R/C-0
R/C-0
R-0
R-0
R-0
R-0
R-0
RXB0OVFL RXB1OVFL TXBO TXBP RXBP TXWARN RXWARN
bit 7
R-0
EWARN
bit 0
bit 7
RXB0OVFL: Receive Buffer 0 Overflow bit
1 = Receive Buffer 0 overflowed
0 = Receive Buffer 0 has not overflowed
bit 6
RXB1OVFL: Receive Buffer 1 Overflow bit
1 = Receive Buffer 1 overflowed
0 = Receive Buffer 1 has not overflowed
bit 5
TXBO: Transmitter Bus-Off bit
1 = Transmit Error Counter > 255
0 = Transmit Error Counter ≤ 255
bit 4
TXBP: Transmitter Bus Passive bit
1 = Transmission Error Counter > 127
0 = Transmission Error Counter ≤ 127
bit 3
RXBP: Receiver Bus Passive bit
1 = Receive Error Counter > 127
0 = Receive Error Counter ≤ 127
bit 2
TXWARN: Transmitter Warning bit
1 = 127 ≥ Transmit Error Counter > 95
0 = Transmit Error Counter ≤ 95
bit 1
RXWARN: Receiver Warning bit
1 = 127 ≥ Receive Error Counter > 95
0 = Receive Error Counter ≤ 95
bit 0
EWARN: Error Warning bit
This bit is a flag of the RXWARN and TXWARN bits.
1 = The RXWARN or the TXWARN bits are set
0 = Neither the RXWARN or the TXWARN bits are set
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
C = Clearable bit
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
x = Bit is unknown
 2004 Microchip Technology Inc.
DS41159D-page 205