DMA, Interrupts, and Events

Table 1. Module Requests for TCC
Condition	Interrupt request	Event output	Event input	DMA request	DMA request is cleared
Overflow / Underflow	Yes	Yes		Yes⁽¹⁾	On DMA acknowledge
Channel Compare Match or Capture	Yes	Yes	Yes⁽²⁾	Yes⁽³⁾	For circular buffering: on DMA acknowledge For capture channel: when CCx register is read
Retrigger	Yes	Yes
Count	Yes	Yes
Capture Overflow Error	Yes
Debug Fault State	Yes
Recoverable Faults	Yes
Non-Recoverable Faults	Yes
TCCx Event 0 input			Yes⁽⁴⁾
TCCx Event 1 input			Yes⁽⁵⁾

Notes:

1.DMA request set on overflow, underflow or re-trigger conditions.
2.Can perform capture or generate recoverable fault on an event input.
3.In capture or circular modes.
4.On event input, either action can be executed:
- re-trigger counter
- control counter direction
- stop the counter
- decrement the counter
- perform period and pulse width capture
- generate non-recoverable fault
5.On event input, either action can be executed:
- re-trigger counter
- increment or decrement counter depending on direction
- start the counter
- increment or decrement counter based on direction
- increment counter regardless of direction
- generate non-recoverable fault