View source for NXP Servo PCA9685 (I2C)

[[Image:TArduinoPCA9685Servo.png]]

== Summary ==  
Provides 16-channel PWM control via I2C using the NXP PCA9685 chip.  

== Description ==  
The **NXP PCA9685 Servo (I2C)** component allows independent PWM/servo control over 16 channels.  
Each channel can be individually enabled, assigned an initial value, and reversed if necessary.  
It supports external clock input and open-drain mode.  

<b>Diagram:</b>  

[[Image:TArduinoPCA9685Servo.Preview.png]]


== Properties ==  
* '''Address''' (i2c) – I2C address of the PCA9685.  
* '''Enabled''' – Enables/disables the driver.  
* '''External Clock''' (boolean) – Use external clock source.  
* '''Open Drain''' (boolean) – Set outputs to open-drain mode.  
* '''Oscillator Frequency''' (Hz, default 25 000 000) – Base oscillator frequency.  
* '''Output Logic Mode''' (olmZero, olmOne, olmHighImpedance) – Output driver mode.  
* '''Sleep''' (boolean) – Low-power sleep mode.  
* '''Update On Ack''' (boolean) – Update outputs on I2C ACK.  

=== Per-Channel Properties (Channel[0]–Channel[15]) ===  

{| class="wikitable"
! Property
! Type
! Description
|-
| Enabled || boolean || Enables/disables this PWM channel
|-
| Initial Value || boolean || Initial output value
|-
| Reversed || boolean || Invert/reverse output polarity
|}

== Pins ==  

=== Channel Pins ===  

{| class="wikitable"
! Channel
! In (analog)
|-
| Channel[0] || ✓
|-
| Channel[1] || ✓
|-
| Channel[2] || ✓
|-
| Channel[3] || ✓
|-
| Channel[4] || ✓
|-
| Channel[5] || ✓
|-
| Channel[6] || ✓
|-
| Channel[7] || ✓
|-
| Channel[8] || ✓
|-
| Channel[9] || ✓
|-
| Channel[10] || ✓
|-
| Channel[11] || ✓
|-
| Channel[12] || ✓
|-
| Channel[13] || ✓
|-
| Channel[14] || ✓
|-
| Channel[15] || ✓
|}

=== Control Pins ===  

{| class="wikitable"
! Pin
! Direction
! Type
! Description
|-
| Clock || In || digital || Clock input
|-
| Control || I/O || i2c || I2C communication control
|}

== Categories ==  
*[[Image:TArduinoPWMsCategory.png]] [[Category PWM]] – Provides PWM/servo control.  
*[[Image:TArduinoI2CCategory.png]] [[Category I2C]] – Communicates using I2C protocol.  

[[Category:Components]]