41.6.5.2 Interrupts

The TCC has the following interrupt sources:

• Overflow/Underflow (OVF)
• Retrigger (TRG)
• Count (CNT) – Refer also to the description of EVCTRL.CNTSEL
• Capture Overflow Error (ERR)
• Non-Recoverable Update Fault (UFS)
• Debug Fault State (DFS)
• Recoverable Faults (FAULTn)
• Non-recoverable Faults (FAULTx)
• Compare Match or Capture Channels (MCx)

These interrupts are asynchronous wake-up sources.

Each interrupt source has an Interrupt flag associated with it. The Interrupt flag in the Interrupt Flag Status and Clear (INTFLAG) register is set when the Interrupt condition occurs. Each interrupt can be individually enabled by writing a ‘1’ to the corresponding bit in the Interrupt Enable Set (INTENSET) register, and disabled by writing a ‘1’ to the corresponding bit in the Interrupt Enable Clear (INTENCLR) register. The status of enabled interrupts can be read from either INTENSET or INTENCLR.

An interrupt request is generated when the Interrupt flag is set and the corresponding interrupt is enabled. The interrupt request remains active until the Interrupt flag is cleared, the interrupt is disabled or the TCC is reset. See INTFLAG from Related Links for details on how to clear Interrupt flags. The TCC has one common interrupt request line for all the interrupt sources. The user must read the INTFLAG register to determine which Interrupt condition is present.

Interrupts must be globally enabled for interrupt requests to be generated. See Nested Vector Interrupt Controller (NVIC) from Related Links.