33.8.9 Synchronization Busy
| Name: | SYNCBUSY |
| Offset: | 0x1C |
| Reset: | 0x00000000 |
| Property: | - |
| 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 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| LENGTH | CTRLB | ENABLE | SWRST | ||||||
| Access | R | R | R | R | |||||
| Reset | 0 | 0 | 0 | 0 |
Bit 4 – LENGTH LENGTH Synchronization Busy
Writing to the LENGTH register requires synchronization. When writing to LENGTH, SYNCBUSY.LENGTH is set until synchronization is complete. If the LENGTH register is written to while SYNCBUSY.LENGTH is asserted, an APB error is generated.
| Value | Description |
|---|---|
| 0 | LENGTH synchronization is not busy. |
| 1 | LENGTH synchronization is busy. |
Bit 2 – CTRLB CTRLB Synchronization Busy
Writing to the CTRLB when the SERCOM is enabled requires synchronization. Ongoing synchronization is indicated by SYNCBUSY.CTRLB = 1 until synchronization is complete. If CTRLB is written while SYNCBUSY.CTRLB = 1, an APB error is generated.
| Value | Description |
|---|---|
| 0 | CTRLB synchronization is not busy. |
| 1 | CTRLB synchronization is busy. |
Bit 1 – ENABLE SERCOM Enable Synchronization Busy
Enabling and disabling the SERCOM (CTRLA.ENABLE) requires synchronization. Ongoing synchronization is indicated by SYNCBUSY.ENABLE = 1 until synchronization is complete.
| Value | Description |
|---|---|
| 0 | Enable synchronization is not busy. |
| 1 | Enable synchronization is busy. |
Bit 0 – SWRST Software Reset Synchronization Busy
Resetting the SERCOM (CTRLA.SWRST) requires synchronization. Ongoing synchronization is indicated by SYNCBUSY.SWRST = 1 until synchronization is complete.
| Value | Description |
|---|---|
| 0 | SWRST synchronization is not busy. |
| 1 | SWRST synchronization is busy. |