SPRUJ79 November 2024 F29H850TU
The GPIO mux registers must be configured to connect this peripheral to the device pins. To avoid glitches on the pins, the GPyGMUX bits must be configured first (while keeping the corresponding GPyMUX bits at the default of zero), followed by writing the GPyMUX register to the desired value.
Some IO functionality is defined by GPIO register settings independent of this peripheral. For input signals, the GPIO input qualification is set to asynchronous mode by setting the appropriate GPxQSELn register bits to 11b. The internal pullups are configured in the GPyPUD register.
To support a wider range of PMBus IO levels, certain GPIOs have configurable fail-safe systems, VIH minimum thresholds, and configurable sinking capabilities. Specifically, the configurable sink current support is mandated for fast plus mode.
See the General-Purpose Input/Output (GPIO) chapter for more details on GPIO mux and settings.