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
Parent topic: Functional Description