RTL8711DCM and MCU Interface Design Guide¶

Phaten IoT RTL8711DCM Module Hardware Interface Configuration and MCU Interaction Complete Reference Documentation

Overview¶

This document provides detailed information about the RTL8711DCM WiFi module hardware interface design with host MCU and SOC, including UART communication, I2S audio interface, GPIO control and other key functions pin configuration and circuit design reference.

1. Hardware Interface Reference Schematic¶

2. Core Function Interface Configuration¶

2.1 Debug UART Interface¶

The RTL8711DCM module provides dedicated debug UART for system log output and development debugging.

2.2 MCU Communication UART Interface¶

Primary data communication interface between RTL8711DCM and external MCU.

2.3 User Control Interface¶

2.3.1 Pairing Button Interface¶

2.3.2 LED Status Indicator¶

3. I2S Audio Interface Configuration¶

3.1 I2S Audio Input Interface (TX)¶

RTL8711DCM supports dual I2S audio input, suitable for stereo audio capture applications.

3.1.1 Master Clock Signal¶

3.1.2 First I2S Input Signal¶

3.1.3 Second I2S Input Signal¶

3.2 I2S Audio Output Interface (RX)¶

RTL8711DCM provides I2S audio output function, supporting multi-channel audio playback.

3.2.1 Master Clock Signal¶

3.2.2 I2S Output Signal Group¶

Part Two: RTL8711DCM and SOC Amplifier Integrated Design¶

4. SOC Amplifier Integrated Design Solution¶

4.1 Audio Transmit (TX) Reference Design¶

4.1.1 Power Management System¶

RTL8711DCM audio transmit end adopts multi-level power management solution to ensure stable system operation.

DC-DC Power Configuration¶

4.1.2 TX I2S-TDM Audio Input Interface¶

RTL8711DCM transmit end I2S-TDM interface configuration, supporting high-quality audio transmission.

4.1.3 TX End UART Interface¶

Debug UART¶

MCU Communication UART¶

4.2 Audio Receive (RX) Reference Design¶

4.2.1 Power System Configuration¶

RTL8711DCM audio receive end power system design, supporting speaker amplifier applications.

Power Configuration Solution¶

4.2.2 User Control Interface¶

RTL8711DCM receive end provides button and LED indicator interfaces for user interaction and status indication.

4.2.3 Amplifier Drive Control¶

RTL8711DCM integrates ACM8625P amplifier chip control interface to achieve high-quality audio output.

I2C Control Interface¶

I2S Audio Data Interface¶

Amplifier Control Signals¶