25.2.1 Functional Description

The TCC module consists of following sections:

  • Base Counter

  • Compare/Capture channels, with waveform generation

  • Waveform extension control and fault detection

  • Interface to the event system, DMAC, and the interrupt system

The base counter can be configured to either count a prescaled generic clock or events from the event system.(TCEx, with event action configured to counting). The counter value can be used by compare/capture channels which can be set up either in compare mode or capture mode.

In capture mode, the counter value is stored when a configurable event occurs. This mode can be used to generate timestamps used in event capture, or it can be used for the measurement of a periodic input signal's frequency/duty cycle.

In compare mode, the counter value is compared against one or more of the configured channels' compare values. When the counter value coincides with a compare value an action can be taken automatically by the module, such as generating an output event or toggling a pin when used for frequency or PWM signal generation.

Note: The connection of events between modules requires the use of the SAM Event System Driver (EVENTS) to route output event of one module to the the input event of another. For more information on event routing, refer to the event driver documentation.
In compare mode, when output signal is generated, extended waveform controls are available, to arrange the compare outputs into specific formats. The Output matrix can change the channel output routing. Pattern generation unit can overwrite the output signal line to specific state. The Fault protection feature of the TCC supports recoverable and non-recoverable faults.