22.3.3.4 Synchronized with TCAn

TCB can be configured to use the clock (CLK_TCA) of the Timer/Counter type A (TCAn) by writing to the Clock Select bit field (CLKSEL) in the Control A register (TCBn.CTRLA). In this setting, the TCB will count on the exact same clock source as selected in TCA.

When the Synchronize Update bit (SYNCUPD) in the Control A register (TCBn.CTRLA) is written to ‘1’, the TCB counter will restart when the TCA counter restarts.