Difference between revisions of "ETRA SOM/ETRA Hardware/Peripherals/GPIOs"
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Revision as of 13:27, 31 December 2020
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| Version | Issue Date | Notes | |
| 1.0.0 | Dec 2020 | First Release | |
Peripheral GPIOs[edit | edit source]
The general-purpose input/output (GPIO) peripheral provides dedicated general-purpose pins that can be configured as either inputs or outputs.
Description[edit | edit source]
The primary GPIOs interface available on ETRA SoM is based on STM32MP1 SoC.
The STM32MP1 GPIO ports supports the following standards and features:
- output states: push-pull or open drain + pull-up/down
- speed selection for each I/O
- input states: floating, pull-up/down, analog
- bit set and reset register for atomic read/modify access
- analog function
- fast toggle capable of changing every two clock cycles
- external interrupt capability (unavailable in analog mode)
A secondary GPIOs interface available on ETRA SoM is based on ADP5589 I/O expander. This expander is controlled by an internal I2C BUS.
The ADP5589 GPIO ports supports the following standards and features:
- output states: push-pull or open drain + pull-up/down
- input states: floating, pull-up/down, IRQ
- keypad decoding for matrix up to 11 × 8
- key press/release interrupts
- dual programmable logic blocks
- PWM generator
- clock divider
- reset generators
Pin mapping[edit | edit source]
The Pin mapping is described in the Pinout table section
