34.6.6 Sleep Mode Operation
The TCC can be configured to operate in any sleep mode. To be able to run in standby the RUNSTDBY bit in the Control A register (CTRLA.RUNSTDBY) must be '1'. The MODULE can in any sleep mode wake up the device using interrupts or perform actions through the Event System.
When the device is in Standby Sleep mode the DMA is not able to write the CTRLB, STATUS, COUNT, PATT, WAVE, PER, PERBUF, CC, CCBUF registers. To write these registers with the DMA the device must be in Active mode or Idle Sleep mode.