SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The WKUP_GPIOu (u = 0, 1) and GPIOn (n = 0, 2, 4, 6) modules are hereinafter referred to as GPIO module.
This section describes the GPIO external connections (environment).
The general-purpose interface combines six GPIO modules in two groups for a flexible, user-programmable, general-purpose input/output (I/O) controller, and to allows protection between two different processor virtual worlds. The general-purpose interface implements functions that are not implemented with the dedicated controllers in the device and require simple input and/or output software-controlled signals. The GPIO allows a variety of custom connections and expands the I/O capabilities of the system to the real world.
The general-purpose interface can physically connect the device to a keyboard matrix and peripheral integrated circuits (ICs).
Figure 12-54 shows a typical application using the general-purpose interface configured to operate with WKUP_GPIO0 and GPIO0 on I/O pins.