29.6.4 RCxSTA

Receive Status and Control Register
Name: RCxSTA
Address: 0xF9C,0xE98

Bit 76543210 
 SPENRX9SRENCRENADDENFERROERRRX9D 
Access R/WR/WR/WR/WR/WROR/HCR/HC 
Reset 00000000 

Bit 7 – SPEN Serial Port Enable bit

ValueDescription
1

Serial port enabled
0

Serial port disabled (held in Reset)

Bit 6 – RX9 9-Bit Receive Enable bit

ValueDescription
1

Selects 9-bit reception
0

Selects 8-bit reception

Bit 5 – SREN Single Receive Enable bit

Controls reception. This bit is cleared by hardware when reception is complete

ValueNameDescription
1 SYNC = 1 AND CSRC = 1

Start single receive
0 SYNC = 1 AND CSRC = 1

Single receive is complete
X SYNC = 0 OR CSRC = 0

Don’t care

Bit 4 – CREN Continuous Receive Enable bit

ValueNameDescription
1 SYNC = 1

Enables continuous receive until enable bit CREN is cleared (CREN overrides SREN)
0 SYNC = 1

Disables continuous receive
1 SYNC = 0

Enables receiver
0 SYNC = 0

Disables receiver

Bit 3 – ADDEN Address Detect Enable bit

ValueNameDescription
1 SYNC = 0 AND RX9 = 1

The receive buffer is loaded and the interrupt occurs only when the ninth received bit is set
0 SYNC = 0 AND RX9 = 1

All bytes are received and interrupt always occurs. Ninth bit can be used as parity bit
X RX9 = 0 OR SYNC = 1

Don't care

Bit 1 – OERR Overrun Error bit

ValueDescription
1

Overrun error (can be cleared by clearing either SPEN or CREN bit)
0

No overrun error

Bit 0 – RX9D Ninth bit of Received Data

This can be address/data bit or a parity bit which is determined by user firmware.