SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
The Timer2 clock runs independently of AUX operational mode. There are four possible sources for Timer2 clock:
Figure 20-24 shows that the clock source configuration is located within the AUX_SYSIF, which handles AUX domain clock and power management. Access to Timer2 is only possible when a clock is selected. To select a clock use the sequence that follows:
Clock switch is complete, and AUX Timer2 receives the selected clock.
The AUX operational mode must be set to Active to select SCLK_HFDIV2. Only change operational mode when AUX_SYSIF:TIMER2CLKSWITCH.RDY = 1. There is no similar requirement when switching to other clock sources.