50.7.5 QSPI Status Register
| Name: | QSPI_SR |
| Offset: | 0x10 |
| Reset: | 0x00000000 |
| Property: | Read-only |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| QSPIENS | |||||||||
| Access | R | ||||||||
| Reset | 0 |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| INSTRE | CSS | CSR | |||||||
| Access | R | R | R | ||||||
| Reset | 0 | 0 | 0 |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| OVRES | TXEMPTY | TDRE | RDRF | ||||||
| Access | R | R | R | R | |||||
| Reset | 0 | 0 | 0 | 0 |
Bit 24 – QSPIENS QSPI Enable Status
| Value | Description |
|---|---|
| 0 | QSPI is disabled. |
| 1 | QSPI is enabled. |
Bit 10 – INSTRE Instruction End Status (cleared on read)
| Value | Description |
|---|---|
| 0 | No instruction end has been detected since the last read of QSPI_SR. |
| 1 | At least one instruction end has been detected since the last read of QSPI_SR. |
Bit 9 – CSS Chip Select Status
| Value | Description |
|---|---|
| 0 | The chip select is asserted. |
| 1 | The chip select is not asserted. |
Bit 8 – CSR Chip Select Rise (cleared on read)
| Value | Description |
|---|---|
| 0 | No chip select rise has been detected since the last read of QSPI_SR. |
| 1 | At least one chip select rise has been detected since the last read of QSPI_SR. |
Bit 3 – OVRES Overrun Error Status (cleared on read)
An overrun occurs when QSPI_RDR is loaded at least twice from the serializer since the last read of the QSPI_RDR.
| Value | Description |
|---|---|
| 0 | No overrun has been detected since the last read of QSPI_SR. |
| 1 | At least one overrun error has occurred since the last read of QSPI_SR. |
Bit 2 – TXEMPTY Transmission Registers Empty (cleared by writing QSPI_TDR)
| Value | Description |
|---|---|
| 0 | As soon as data is written in QSPI_TDR. |
| 1 | QSPI_TDR and the internal shifter are empty. If a transfer delay has been defined, TXEMPTY is set after the completion of such delay. |
Bit 1 – TDRE Transmit Data Register Empty (cleared by writing QSPI_TDR)
TDRE equals zero when the QSPI is disabled or at reset. The QSPI enable command sets this bit to one.
| Value | Description |
|---|---|
| 0 | Data has been written to QSPI_TDR and not yet transferred to the serializer. |
| 1 | The last data written in the QSPI_TDR has been transferred to the serializer. |
Bit 0 – RDRF Receive Data Register Full (cleared by reading QSPI_RDR)
| Value | Description |
|---|---|
| 0 | No data has been received since the last read of QSPI_RDR. |
| 1 | Data has been received and the received data has been transferred from the serializer to QSPI_RDR since the last read of QSPI_RDR. |