SWCU191 February 2022 CC1311P3 , CC1311R3 , CC2651P3 , CC2651R3 , CC2651R3SIPA
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/Ox are synchronized by default at the SCE clock rate and when the System CPU writes teh AIODIO instance. The latter must be confined to initialize before the AUX peripheral 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.