【Wide Voltage Compatibility】 4.5V to 36V DC power supply; supports vehicle and industrial power sources; no need for external voltage regulators
【High-Fidelity Audio Playback】 MP3/WAV hardware decoding; 8KHz to 48KHz sampling rate; built-in 0.5W class D amplifier for 3W/8Ω passive speakers
【Flexible Storage Options】 Supports SPI-Flash, USB, and TF card up to 32GB; FAT32 file system; easy voice file updates via USB as a U disk
【Low Power Consumption】 Less than 600µA in deep sleep mode; wake-up via IO pins; compatible with low-power embedded systems
【Easy Integration and Stability】 UART serial interface at 9600 baud; anti-interference design with separated power and audio lines; works in -20°C to +70°C Settings

1. Product Parameters ( )

Input Voltage: 4.5V-36V DC (Wide Voltage Compatibility)

Audio Format: MP3/WAV Hardware Decoding (8kHz-48kHz Sampling Rate)

Storage Support: SPI-Flash/U Disk/TF Card (FAT32, up to 32GB)

Control Interface: UART Serial Port (9600bps, 8 Data Bits, 1 Stop Bit, No Parity)

Output Power: 0.5W Built-in Amplifier (Drives 3W/8Ω Speaker)

Standby Current:

Operating Temperature: -20℃ to +70℃ (Reliable)

2. Main Pin Functions ( )

VCC: DC Power Input+ (4.5V-36V). Parallel 47μF+0.1μF Capacitors Recommended for Filtering.

GND: Power Ground. Must Share Common Ground with MCU (Wire ≤3cm).

RXD: UART Data Receive (Connect to MCU TX). Logic Level 3.3V (5V Systems Require 1kΩ Resistor).

TXD: UART Data Transmit (Playback Status Setting). Do Not Load When Suspended.

BUSY: Playback Status Indicator (High=Playing). Connect to MCU Interrupt for Synchronization.

SPK+/SPK-: Differential Audio Output to 3W/8Ω Passive Speaker (Avoid Active Speakers).

IO1-IO7: Trigger Control Pins (Short to GND to Play Preset Audio, e.g., IO1 Triggers 00001.mp3).

3. FAQ

Q1: USB Not Recognized by Computer?

A1: Use Data-Supported USB Cable. Press Reset for 3s to Force USB Disk Mode.

Q2: Audio Noise or Distortion?

A2: Add 100μF Capacitor to VCC. Use Shielded Twisted-Pair Audio Wires (≤20cm) with 10Ω+104pF Filter.

Q3: Serial Commands Unresponsive?

A3: Verify Baud Rate=9600. Add 330Ω Resistor to RXD for 5V/3.3V Level Matching.

Q4: Plug-in Playback Fails?

A4: Store Files in Root "ADVERT" Folder. Use Command "PLAY ADVERT/00005" for 00005.mp3.

مرحبًا،

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