39.5.2.3 Comparator Configuration

Each individual comparator must be configured by its respective Comparator Control register (COMPCTRLx) before that comparator is enabled. These settings cannot be changed while the comparator is enabled.

• Select the desired measurement mode with COMPCTRLx.SINGLE. See Starting a Comparison from Related Links.

• Fixed hysteresis does not support programmable Hysteresis.

• Fixed speed of operation
• Select the interrupt source with COMPCTRLx.INTSEL.
• Select the positive and negative input sources with the COMPCTRLx.MUXPOS and COMPCTRLx.MUXNEG bits. See Selecting Comparator Inputs from Related Links.
• Select the filtering option with COMPCTRLx.FLEN.
• Select the standby operation with the Run in Standby bit (COMPCTRLx.RUNSTDBY).

The individual comparators are enabled by writing a ‘1’ to the Enable bit in the Comparator x Control registers (COMPCTRLx.ENABLE). The individual comparators are disabled by writing a ‘0’ to COMPCTRLx.ENABLE. Writing a ‘0’ to CTRLA.ENABLE will also disable all the comparators but will not clear their COMPCTRLx.ENABLE bits.