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=== Description ===
The primary GPIOs interface available on ETRA SoM SOM is based on STM32MP1 SoC.
The STM32MP1 GPIO ports supports the following standards and features:
A secondary GPIOs interface available on ETRA SoM is based on ADP5589 I/O expander. This expander is controlled by an internal I2C BUS.
* output states: push-pull or open drain + pull-up/down
* input states: floating, pull-up/down, IRQ
* clock divider
* reset generators
Please refer to the [[ETRA_SOM/Part_number_composition | ETRA Part number composition]] for the related order code option.
===Pin mapping===