Microchip Technology MCU PIC PIC18F87K22-I/PTRSL TQFP-80 MCP PIC18F87K22-I/PTRSL Data Sheet
Product codes
PIC18F87K22-I/PTRSL
PIC18F87K22 FAMILY
DS39960D-page 330
2009-2011 Microchip Technology Inc.
REGISTER 22-3:
BAUDCONx: BAUD RATE CONTROL REGISTER
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:
Data/Receive Polarity Select bit
Asynchronous mode:
1
1
= Receive data (RXx) is inverted (active-low)
0
= Receive data (RXx) is not inverted (active-high)
Synchronous mode:
1
1
= Data (DTx) is inverted (active-low)
0
= Data (DTx) is not inverted (active-high)
bit 4
TXCKP:
Synchronous Clock Polarity Select bit
Asynchronous mode:
1
1
= Idle state for transmit (TXx) is a low level
0
= Idle state for transmit (TXx) is a high level
Synchronous mode:
1
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 (Compatible mode), SPBRGHx value ignored
bit 2
Unimplemented:
Read as ‘0’
bit 1
WUE:
Wake-up Enable bit
Asynchronous mode:
1
1
= EUSART 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.
Unused in this mode.
bit 0
ABDEN:
Auto-Baud Detect Enable bit
Asynchronous mode:
1
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 is disabled or has completed
Synchronous mode:
Unused in this mode.
Unused in this mode.