To enable and use capture operations, the event line into the TC must be enabled using the TC Event Input bit in the Event Control register (EVCTRL.TCEI). The capture channels to be used must also be enabled in the Capture Channel x Enable bit group in the Control C register (CTRLC.CPTENx) before capture can be performed.
To enable and use capture operations, the corresponding Capture Channel x Enable bit in the Control C register (CTRLC.CAPTENx) must be written to '1'.
A capture trigger can be provided by asynchronous IO pin WO[x] for each capture channel or by a TC event. To enable the capture from the IO pin, the Capture On Pin x Enable bit in CTRLC register (CTRLC.COPENx) must be written to '1'.