42.6.7 Sleep Mode Operation
The ONDEMAND and RUNSTDBY bits in the Control A register (CTRLA) control the behavior of the ADC during standby sleep mode, in cases where the ADC is enabled (CTRLA.ENABLE = 1). For further details on available options, refer to Table 42-4.
Note: When CTRLA.ONDEMAND=1, the analog block is powered-off when the conversion is complete.
When a start request is detected, the system returns from sleep and starts a new conversion
after the start-up time delay.
| CTRLA.RUNSTDBY | CTRLA.ONDEMAND | CTRLA.ENABLE | Description |
|---|---|---|---|
| x | x | 0 | Disabled |
| 0 | 0 | 1 | Run in all sleep modes except STANDBY. |
| 0 | 1 | 1 | Run in all sleep modes on request, except STANDBY. |
| 1 | 0 | 1 | Run in all sleep modes. |
| 1 | 1 | 1 | Run in all sleep modes on request. |