15.8.1 Control
| Name: | CTRL |
| Offset: | 0x00 |
| Reset: | 0x00 |
| Property: | Write-Protected |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| BKUPCLK | CFDEN | ||||||||
| Access | R/W | R/W | |||||||
| Reset | 0 | 0 |
Bit 4 – BKUPCLK Backup Clock Select
This bit is set by hardware when a clock failure is detected.
| Value | Description |
|---|---|
| 0 | The GCLK_MAIN clock is selected for the main clock. |
| 1 | The OSC8M backup clock is selected for the main clock. |
Bit 2 – CFDEN Clock Failure Detector Enable
This bit is set by hardware when a clock failure is detected.
| Value | Description |
|---|---|
| 0 | The clock failure detector is disabled. |
| 1 | The clock failure detector is enabled. |