SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
The I2S:AIFDIRCFG register configures whether each ADx signal is input, output, or unused.
Each used I2S signal must be mapped to a physical I/O pin, DIOn, by configuring the corresponding IOC:IOCFGn register.