The low-power comparator (LPCOMP) peripheral compares an input voltage against a reference voltage.
The main features of LPCOMP are the following:
- Input range of 0 to VDD
- Ultra-low power
- Eight input options (AIN0 to AIN7)
- Two reference voltage options:
- Two external analog reference inputs
- 15-level internal reference ladder (VDD/16)
- Optional hysteresis enable on input
- Wakeup source from System OFF or System ON IDLE
In System ON, LPCOMP can generate separate events on rising and falling edges of a signal, or sample the current state of the pin to determine if it is above or below the selected reference. The block is configurable to use any of the analog inputs on the device. Additionally, LPCOMP can be used as an analog wakeup source from System ON IDLE or System OFF. The comparator threshold is programmable to a range of supply voltage fractions.
Note: LPCOMP cannot be used (STARTed) at the same time as COMP. Only one comparator
can be used at a time.