PIC17C4X
DS30412C-page 84
1996 Microchip Technology Inc.
FIGURE 13-2: RCSTA REGISTER (ADDRESS: 13h, BANK 0)
R/W - 0
U - 0
R - 0
R - x
SPEN
RX9
SREN
CREN
FERR
OERR
RX9D
R = Readable bit
W = Writable bit
-n = Value at POR reset
(x = unknown)
bit7
bit 0
bit 7:
SPEN: Serial Port Enable bit
1 = Congures RA5/RX/DT and RA4/TX/CK pins as serial port pins
0 = Serial port disabled
bit 6:
RX9: 9-bit Receive Enable bit
1 = Selects 9-bit reception
0 = Selects 8-bit reception
bit 5:
SREN: Single Receive Enable bit
This bit enables the reception of a single byte. After receiving the byte, this bit is automatically cleared.
Synchronous mode:
1 = Enable reception
0 = Disable reception
Note: This bit is ignored in synchronous slave reception.
Asynchronous mode:
Don’t care
bit 4:
CREN: Continuous Receive Enable bit
This bit enables the continuous reception of serial data.
Asynchronous mode:
1 = Enable reception
0 = Disables reception
Synchronous mode:
1 = Enables continuous reception until CREN is cleared (CREN overrides SREN)
0 = Disables continuous reception
bit 3:
Unimplemented: Read as '0'
bit 2:
FERR: Framing Error bit
1 = Framing error (Updated by reading RCREG)
0 = No framing error
bit 1:
OERR: Overrun Error bit
1 = Overrun (Cleared by clearing CREN)
0 = No overrun error
bit 0:
RX9D: 9th bit of receive data (can be the software calculated parity bit)
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