NXP Servo PCA9685 (I2C)
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.
Diagram:
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])
| 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
| 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
| Pin | Direction | Type | Description |
|---|---|---|---|
| Clock | In | digital | Clock input |
| Control | I/O | i2c | I2C communication control |
Categories
- File:TArduinoPWMsCategory.png Category PWM – Provides PWM/servo control.
- File:TArduinoI2CCategory.png Category I2C – Communicates using I2C protocol.
