View source for PCA9674/PCA9674A GPIO (I2C)

[[Image:TArduinoPCA9674.png]]

== Summary ==  
I2C-controlled GPIO expander with 8 channels, configurable as inputs or outputs.  

== Description ==  
The **PCA9674/PCA9674A** component allows 8 GPIO channels to be controlled via I2C.  
Each channel can be individually configured as an input or output with a default digital value.  
This component is useful for expanding the number of digital I/O pins on a microcontroller and controlling LEDs, buttons, or other digital devices.  

<b>Diagram:</b>  

[[Image:TArduinoPCA9674.Preview.png]]

== Categories ==  
*[[Image:TArduinoI2CCategory.png]] [[Category I2C]] – Components controlled via I2C bus.  
*[[Image:TArduinoDigitalCategory.png]] [[Category Digital]] – Components handling digital logic signals.  

== Properties ==  
=== Channel Properties ===  
Each channel (Channel[0] to Channel[7]) has the following properties:  
*'''Auto Config''' – Automatically configure channel at startup.  
*'''Initial Value''' – Default digital value (boolean).  
*'''Is Output''' – Configure the channel as digital output (otherwise input).  

== Pins ==  

{| class="wikitable"
! Channel !! Digital Input !! Digital Output
|-
| Channel[0] || In (Digital) || Out
|-
| Channel[1] || In (Digital) || Out
|-
| Channel[2] || In (Digital) || Out
|-
| Channel[3] || In (Digital) || Out
|-
| Channel[4] || In (Digital) || Out
|-
| Channel[5] || In (Digital) || Out
|-
| Channel[6] || In (Digital) || Out
|-
| Channel[7] || In (Digital) || Out
|}

=== I2C Pins ===  
*'''I2C''' – I2C communication pins for controlling the PCA9674/PCA9674A.  

[[Category:Components]]