Datasheet
PIC18F97J60 FAMILY
DS39762F-page 318 2011 Microchip Technology Inc.
REGISTER 21-3: BAUDCONx: BAUD RATE CONTROL REGISTER x
R/W-0 R-1 R/W-0 R/W-0 R/W-0 U-0 R/W-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 = Receive data (RXx) is inverted. Idle state is a low level.
0 = No inversion of receive data (RXx). Idle state is a high level.
Synchronous modes:
1 = Data (DTx) is inverted; Idle state is a low level
0 = No inversion of data (DTx); Idle state is a high level
bit 4 TXCKP: Clock and Data Polarity Select bit
Asynchronous mode:
1 = Transmit data (TXx) is inverted; Idle state is a low level
0 = No inversion of transmit data (TXx); Idle state is a high level
Synchronous modes:
1 = Idle state for clock (CKx) is a high level
0 = Idle state for clock (CKx) is a low level
bit 3 BRG16: 16-Bit Baud Rate Register Enable bit
1 = 16-bit Baud Rate Generator – SPBRGHx and SPBRGx
0 = 8-bit Baud Rate Generator – SPBRGx only, SPBRGHx value ignored (Compatible mode)
bit 2 Unimplemented: Read as ‘0’
bit 1 WUE: Wake-up Enable bit
Asynchronous mode:
1 = EUSARTx will continue to sample the RXx pin – interrupt generated on falling edge; bit cleared in
hardware on following rising edge
0 = RXx 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.