38.6.2.4 Counter Mode
The counter mode is selected by the Mode bit group in the Control A register (CTRLA.MODE).
By default, the counter is enabled in the 16-bit counter resolution. Three counter
resolutions are available:
- COUNT8: 8-bit counter mode
- COUNT16: 16-bit counter mode
- COUNT32: This mode is achieved
by pairing two 16-bit TC peripherals. TCn is paired with TCn+1. TC2 does not support
32-bit resolution.
When paired, the TC peripherals are configured using the registers of the even-numbered TC. The odd-numbered partner will act as a client, and the Client bit in the Status register (STATUS.SLAVE) will be set. The register values of a client will not reflect the registers of the 32-bit counter. Writing to any of the client registers will not affect the 32-bit counter. Normal access to the client COUNT and CCx registers is not allowed.