The general purpose input/output (GPIO) peripheral lets the application write data out and read data in through the device pins. Through the use of the Port A GPIO peripheral, these devices support up to 28 GPIO pins.

The key features of the GPIO module include:

• 0 wait state MMR access from CPU
• Set, clear, or toggle multiple bits without the need of a read-modify-write construct in software
• "FastWake" feature enables low-power wakeup from STOP and STANDBY modes for any GPIO port
• User controlled input filtering

For more details, see the GPIO chapter of the MSPM0 L-Series 32-MHz Microcontrollers Technical Reference Manual.

The following tests can be applied as functional safety mechanisms for this module (to provide diagnostic coverage on a specific function):

• GPIO1

• GPIO2