PIC18F2455_09 Datasheet, PDF (248/438 Pages) Microchip Technology – 28/40/44-Pin,High-Performance,Enhanced Flash,USB Microcontrollers with nanoWatt Technology

PIC18F2455/2550/4455/4550
REGISTER 20-3: BAUDCON: BAUD RATE CONTROL REGISTER
R/W-0
R-1
R/W-0
R/W-0
R/W-0
U-0
ABDOVF
RCIDL
RXDTP
TXCKP
BRG16
—
bit 7
R/W-0
WUE
R/W-0
ABDEN
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘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 received is not inverted
Synchronous modes:
1 = Received Data (DT) is inverted. Idle state is a low level.
0 = No inversion of Data (DT). Idle state is a high level.
bit 4
TXCKP: Clock and Data Polarity Select bit
Asynchronous mode:
1 = TX data is inverted
0 = TX data is not inverted
Synchronous modes:
1 = Clock (CK) is inverted. Idle state is a high level.
0 = No inversion of Clock (CK). Idle state 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.
DS39632E-page 246
© 2009 Microchip Technology Inc.