SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
The digital input buffer must be enabled to use the AUX I/O as digital input. The buffer is enabled when the user sets the corresponding bit in AUX_AIODIOn:GPIODIE.
The AUX I/Os are synchronized by default at the SCE clock rate and when the System CPU writes the AIODIO instance. The latter must be confined to initialize before the AUX peripheral or Sensor Controller function to get constant synchronization clock rate.
Up to eight AUX I/Os enable analog transfer between DIOs and the analog AUX peripherals. To enable analog transfer, set the I/O mode to input and disable the digital input buffer. To determine which AUX I/O enables analog transfer, see Table 14-2.