diff --git a/docs/helios64/gpio.md b/docs/helios64/gpio.md
index 2f74dd2..b5708a8 100644
--- a/docs/helios64/gpio.md
+++ b/docs/helios64/gpio.md
@@ -1,13 +1,10 @@
-## User Accessible GPIOs (P5)
+Helios64 provides 16 GPIOs via a 20-Pin header (P5). Those GPIOs are provided via an 16-bit IO Expander [PCA9655E](http://www.onsemi.com/PowerSolutions/product.do?id=PCA9655E) connected to I2C bus 2.
 
-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 2.
+![GPIO](/helios64/img/gpio/gpio.jpg)
 
-Unlike Helios4 whereas some pin of IO expander is used for system usage, on Helios64 all 16 GPIOs can be used for user application.
+## Pinout
 
-![P5 Pinout](/helios64/img/gpio/gpio.jpg)
-
-## Pinout Table
+![P5 Pinout](/helios64/img/gpio/gpio_pinout.jpg)
 
 | PIN | Port | Remarks |
 |-----|------|-------------|
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