35.7.5.9 Synchronization Busy
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| 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 will be asserted until synchronization is complete. If the LENGTH register is written to while SYNCBUSY.LENGTH is asserted, a bus 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, after which the bit will read zero. If CTRLB is written while SYNCBUSY.CTRLB=1, a bus error will be 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, after which it will read zero.
| 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, after which it will read zero.
| Value | Description |
|---|---|
| 0 | SWRST synchronization is not busy. |
| 1 | SWRST synchronization is busy. |