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adding uext and front panel pages

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nurix87 2020-03-10 10:13:00 +07:00
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docs/helios64/gpio.md
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## User Accessible GPIOs (P3)
## User Accessible GPIOs (P5)
Helios64 provides 22 GPIOs on header P3 which can be used for user application.
Helios64 provides 22 GPIOs on header P5 which can be used for user application.
Those GPIOs are provided via an 16-bit IO Expander [PCA9655E](http://www.onsemi.com/PowerSolutions/product.do?id=PCA9655E) connected to I2C bus 0.
![P3 Pinout](/helios64/img/hardware/gpio.jpg)
![P5 Pinout](/helios64/img/hardware/gpio.jpg)
### Pinout Table