PIC18F2585_07 Datasheet, PDF (283/482 Pages) Microchip Technology – Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PIC18F2585/2680/4585/4680
REGISTER 23-4: COMSTAT: COMMUNICATION STATUS REGISTER
R/C-0
R/C-0
R-0
Mode 0
RXB0OVFL RXB1OVFL TXBO
R-0
TXBP
R-0
R-0
R-0
R-0
RXBP TXWARN RXWARN EWARN
Mode 1
R/C-0
—
R/C-0
R-0
RXBnOVFL TXB0
R-0
TXBP
R-0
R-0
R-0
R-0
RXBP TXWARN RXWARN EWARN
R/C-0
R/C-0
Mode 2
FIFOEMPTY RXBnOVFL
bit 7
R-0
TXBO
R-0
TXBP
R-0
RXBP
R-0
R-0
R-0
TXWARN RXWARN EWARN
bit 0
bit 7
Mode 0:
RXB0OVFL: Receive Buffer 0 Overflow bit
1 = Receive Buffer 0 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 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
Legend:
C = Clearable bit
-n = Value at POR
R = Readable bit
‘1’ = Bit is set
W = Writable bit U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
© 2007 Microchip Technology Inc.
Preliminary
DS39625C-page 281