SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
Recharge of VDDR can occur when the Sensor Controller requests low-power or power-down operational modes. A recharge causes VDDS current spikes that may affect AUX measurements. The Sensor Controller must follow the routine shown in Figure 20-10 to avoid power noise caused by VDDR recharge during a sensitive measurement.
The routine is only valid when AON_PMCTL:RECHARGECFG.MODE is set to COMPARATOR, as this setting allows the Sensor Controller to execute tasks in Low-Power or Power-Down operational modes.
The Sensor Controller can also detect if the system power controller recharges VDDR within a certain time interval. The procedure is described in AUX_SYSIF:RECHARGEDET (see Section 20.8.9).