SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
Some GPIOs are multiplexed with analog pins and only have digital input functionality. These are also referred to as AIOs. Pins with only an AIO option on this port can only function in input mode. See the device data sheet for list of AIO signals. By default, these pins function as analog pins and the GPIOs are in a high-impedance state. The GPyAMSEL register is used to configure these pins for digital or analog operation.