Difference between revisions of "ETRA SOM/ETRA Hardware/Peripherals/GPIOs"

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__FORCETOC__
 
__FORCETOC__
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<section begin="Body" />
  
 
==Peripheral GPIOs ==
 
==Peripheral GPIOs ==
  
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''TBD: sostituire le sezioni con le informazioni sull'uso della periferica''
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The general-purpose input/output (GPIO) peripheral provides dedicated general-purpose pins that can be configured as either inputs or outputs.
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''Nell'esempio di seguito c'è la descrizione dell'interfaccia HDMI''
 
  
 
=== Description  ===
 
=== Description  ===
  
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The GPIOs interface available on ETRA is based on xxxxx ''TBD:SOC name'' SoC.  
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The primary GPIOs interface available on ETRA SoM is based on STM32MP1 SoC.  
  
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The GPIOs port supports the following standards and features:
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The STM32MP1 GPIO ports supports the following standards and features:
  
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* High-Definition Multimedia Interface Specification, Version 1.4a
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* output states: push-pull or open drain + pull-up/down
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* Support for up to 1080p at 60Hz HDTV display resolutions and up to QXGA graphic display resolutions.
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* speed selection for each I/O
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* Support for 4k x 2k and 3D video formats
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* input states: floating, pull-up/down, analog
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* Support for up to 16-bit Deep Color modes
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* bit set and reset register for atomic read/modify access
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* analog function
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* fast toggle capable of changing every two clock cycles
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* external interrupt capability (unavailable in analog mode)
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A secondary GPIOs interface available on ETRA SoM is based on ADP5589 I/O expander. This expander is controlled by an internal I2C BUS.
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The ADP5589 GPIO ports supports the following standards and features:
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* output states: push-pull or open drain + pull-up/down
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* input states: floating, pull-up/down, IRQ
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* keypad decoding for matrix up to 11 × 8
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* key press/release interrupts
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* dual programmable logic blocks
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* PWM generator
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* clock divider
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* reset generators
  
 
===Pin mapping===
 
===Pin mapping===

Revision as of 14:52, 30 December 2020

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History
Version Issue Date Notes
0.9.0 Dec 2020 First Draft
[TBD_link X.Y.Z] Month Year TBD
... ... ...



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

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