22.6.6 DBGU Status Register
| Name: | DBGU_SR |
| Offset: | 0x0014 |
| Reset: | – |
| Property: | Read-only |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| COMMRX | COMMTX | ||||||||
| Access | R | R | |||||||
| Reset | – | – |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| TXEMPTY | TIMEOUT | ||||||||
| Access | R | R | |||||||
| Reset | – | – |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| PARE | FRAME | OVRE | TXRDY | RXRDY | |||||
| Access | R | R | R | R | R | ||||
| Reset | – | – | – | – | – |
Bit 31 – COMMRX Debug Communication Channel Read Status
| Value | Description |
|---|---|
| 0 | COMMRX from the Arm processor is inactive. |
| 1 | COMMRX from the Arm processor is active. |
Bit 30 – COMMTX Debug Communication Channel Write Status
| Value | Description |
|---|---|
| 0 | COMMTX from the Arm processor is inactive. |
| 1 | COMMTX from the Arm processor is active. |
Bit 9 – TXEMPTY Transmitter Empty
| Value | Description |
|---|---|
| 0 | There are characters in DBGU_THR, or characters are being processed by the transmitter, or the transmitter is disabled. |
| 1 | There are no characters in DBGU_THR and there are no characters being processed by the transmitter. |
Bit 8 – TIMEOUT Receiver Timeout
| Value | Description |
|---|---|
| 0 | There has not been any timeout since the last Start timeout command (DBGU_CR.STTTO), or the Timeout register is 0. |
| 1 | There has been a timeout since the last Start timeout command (DBGU_CR.STTTO). |
Bit 7 – PARE Parity Error
| Value | Description |
|---|---|
| 0 | No parity error has occurred since the last RSTSTA. |
| 1 | At least one parity error has occurred since the last RSTSTA. |
Bit 6 – FRAME Framing Error
| Value | Description |
|---|---|
| 0 | No framing error has occurred since the last RSTSTA. |
| 1 | At least one framing error has occurred since the last RSTSTA. |
Bit 5 – OVRE Overrun Error
| Value | Description |
|---|---|
| 0 | No overrun error has occurred since the last RSTSTA. |
| 1 | At least one overrun error has occurred since the last RSTSTA. |
Bit 1 – TXRDY Transmitter Ready
| Value | Description |
|---|---|
| 0 | A character has been written to DBGU_THR and not yet transferred to the internal shift register, or the transmitter is disabled. |
| 1 | There is no character written to DBGU_THR that is not yet transferred to the internal shift register. |
Bit 0 – RXRDY Receiver Ready
| Value | Description |
|---|---|
| 0 | No character has been received since the last read of DBGU_RHR, or the receiver is disabled. |
| 1 | At least one complete character has been received, transferred to DBGU_RHR, and not yet read. |