40.6.2.8.3 Pulse-Width Capture Action

The TC performs the input capture on the falling edge of the input signal. When the edge is detected, the counter value is cleared and the TC stops counting. When a rising edge is detected on the input signal, the counter restarts the counting operation. To enable the operation on opposite edges, the input signal to capture must be inverted (refer to DRVCTRL.INVEN or EVCTRL.TCEINV).

The TC can detect capture overflow of the input capture channels: When a new capture event is detected while the Capture Interrupt flag (INTFLAG.MCx) is still set, the new timestamp will not be stored and INTFLAG.ERR will be set. The user needs to clear INTFLAG.MCx at the beginning of the interrupt routine and poll the bit until INTFLAG.MCx is cleared before exiting the ISR.