Microchip Technology MA180025 データシート
PIC18F87J90 FAMILY
DS39933D-page 258
2010 Microchip Technology Inc.
REGISTER 19-3:
BAUDCON1: BAUD RATE CONTROL REGISTER 1
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
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
Asynchronous mode:
1
= RXx data is inverted
0
= RXx data is not inverted
Synchronous mode:
1
1
= CKx clocks are inverted
0
= CKx clocks are not inverted
bit 4
TXCKP: Clock and Data Polarity Select bit
Asynchronous mode:
1
Asynchronous mode:
1
= TXx data is inverted
0
= TXx data is not inverted
Synchronous mode:
1
1
= CKx clocks are inverted
0
= CKx clocks are not inverted
bit 3
BRG16: 16-Bit Baud Rate Register Enable bit
1
= 16-bit Baud Rate Generator – SPBRGH1 and SPBRG1
0
= 8-bit Baud Rate Generator – SPBRG1 only (Compatible mode), SPBRGH1 value ignored
bit 2
Unimplemented: Read as ‘0’
bit 1
WUE: Wake-up Enable bit
Asynchronous mode:
1
Asynchronous mode:
1
= EUSART will continue to sample the RX1 pin – interrupt generated on falling edge; bit cleared in
hardware on following rising edge
0
= RX1 pin not monitored or rising edge detected
Synchronous mode:
Unused in this mode.
Unused in this mode.
bit 0
ABDEN: Auto-Baud Detect Enable bit
Asynchronous mode:
1
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.
Unused in this mode.