
PIC18F1230/1330
DS39758D-page 150
2009 Microchip Technology Inc.
REGISTER 15-3:
BAUDCON: BAUD RATE CONTROL REGISTER
R/W-0
R-1
R/W-0
U-0
R/W-0
ABDOVF
RCIDL
RXDTP
TXCKP
BRG16
—
WUE
ABDEN
bit 7
bit 0
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
ABDOVF
: Auto-Baud Acquisition Rollover Status bit
1
= A BRG rollover has occurred during Auto-Baud Rate Detect mode (must be cleared in software)
0
= No BRG rollover has occurred
bit 6
RCIDL
: Receive Operation Idle Status bit
1
= Receive operation is Idle
0
= Receive operation is active
bit 5
RXDTP
: Received Data Polarity Select bit
Asynchronous mode:
1
= RX data is inverted
0
= RX data is not inverted
Synchronous mode:
Unused in this mode.
bit 4
TXCKP
: Clock and Data Polarity Select bit
Asynchronous mode:
1
= Idle state for transmit (TX) is a low level
0
= Idle state for transmit (TX) is a high level
Synchronous mode:
1
= Idle state for clock (CK) is a high level
0
= Idle state for clock (CK) is a low level
bit 3
BRG16:
16-Bit Baud Rate Register Enable bit
1
= 16-bit Baud Rate Generator – SPBRGH and SPBRG
0
= 8-bit Baud Rate Generator – SPBRG only (Compatible mode), SPBRGH value ignored
bit 2
Unimplemented:
Read as ‘0’
bit 1
WUE:
Wake-up Enable bit
Asynchronous mode:
1
= EUSART will continue to sample the RX pin – interrupt generated on falling edge; bit cleared in
hardware on following rising edge
0
= RX pin not monitored or rising edge detected
Synchronous mode:
Unused in this mode.
bit 0
ABDEN
: Auto-Baud Detect Enable bit
Asynchronous mode:
1
= Enable baud rate measurement on the next character. Requires reception of a Sync field (55h);
cleared in hardware upon completion
0
= Baud rate measurement disabled or completed
Synchronous mode:
Unused in this mode.