UART_SR

UART Status Register

  0x14 32 Read-only 0x00000000  

UART Status Register

Bit  31 30 29 28 27 26 25 24  
                   
Access                   
Reset                   
Bit  23 22 21 20 19 18 17 16  
                   
Access                   
Reset                   
Bit  15 14 13 12 11 10 9 8  
  CMP           TXEMPTY    
Access  R           R    
Reset  0           0    
Bit  7 6 5 4 3 2 1 0  
  PARE FRAME OVRE       TXRDY RXRDY  
Access  R R R       R R  
Reset  0 0 0       0 0  

Bit 0 – RXRDY: Receiver Ready

Receiver Ready

ValueDescription
0

No character has been received since the last read of the UART_RHR, or the receiver is disabled.

1

At least one complete character has been received, transferred to UART_RHR and not yet read.

Bit 1 – TXRDY: Transmitter Ready

Transmitter Ready

ValueDescription
0

A character has been written to UART_THR and not yet transferred to the internal shift register, or the transmitter is disabled.

1

There is no character written to UART_THR not yet transferred to the internal shift register.

Bit 5 – OVRE: Overrun Error

Overrun Error

ValueDescription
0

No overrun error has occurred since the last RSTSTA.

1

At least one overrun error has occurred since the last RSTSTA.

Bit 6 – FRAME: Framing Error

Framing Error

ValueDescription
0

No framing error has occurred since the last RSTSTA.

1

At least one framing error has occurred since the last RSTSTA.

Bit 7 – PARE: Parity Error

Parity Error

ValueDescription
0

No parity error has occurred since the last RSTSTA.

1

At least one parity error has occurred since the last RSTSTA.

Bit 9 – TXEMPTY: Transmitter Empty

Transmitter Empty

ValueDescription
0

There are characters in UART_THR, or characters being processed by the transmitter, or the transmitter is disabled.

1

There are no characters in UART_THR and there are no characters being processed by the transmitter.

Bit 15 – CMP: Comparison Match

Comparison Match

ValueDescription
0

No received character matches the comparison criteria programmed in VAL1, VAL2 fields and in CMPPAR bit since the last RSTSTA.

1

The received character matches the comparison criteria.