PIC18F45K80-I Datasheet, PDF (399/622 Pages) Microchip Technology – 28/40/44/64-Pin, Enhanced Flash Microcontrollers with ECAN and nanoWatt XLP Technology

PIC18F66K80 FAMILY
REGISTER 27-4: COMSTAT: COMMUNICATION STATUS REGISTER
R/C-0
R/C-0
Mode 0 _{RXB0OVFL RXB1OVFL}
R-0
TXBO
R-0
TXBP
R-0
RXBP
R-0
TXWARN
R-0
RXWARN
R-0
EWARN
Mode 1
R/C-0
—
R/C-0
RXBnOVFL
R-0
TXB0
R-0
TXBP
R-0
RXBP
R-0
R-0
TXWARN RXWARN
R-0
EWARN
Mode 2
R/C-0
R/C-0
FIFOEMPTY RXBnOVFL
bit 7
R-0
TXBO
R-0
TXBP
R-0
RXBP
R-0
R-0
TXWARN RXWARN
R-0
EWARN
bit 0
Legend:
R = Readable bit
-n = Value at POR
C = Clearable bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
Mode 0:
RXB0OVFL: Receive Buffer 0 Overflow bit
1 = Receive Buffer 0 has overflowed
0 = Receive Buffer 0 has not overflowed
Mode 1:
Unimplemented: Read as ‘0’
Mode 2:
FIFOEMPTY: FIFO Not Empty bit
1 = Receive FIFO is not empty
0 = Receive FIFO is empty
bit 6
Mode 0:
RXB1OVFL: Receive Buffer 1 Overflow bit
1 = Receive Buffer 1 has overflowed
0 = Receive Buffer 1 has not overflowed
Mode 1, 2:
RXBnOVFL: Receive Buffer n Overflow bit
1 = Receive Buffer n has overflowed
0 = Receive Buffer n 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 = Transmit error counter > 127
0 = Transmit 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 = 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
 2010-2012 Microchip Technology Inc.
DS39977F-page 399