QJ007M02 is a voice module that provides a serial port which perfectly integrated MP3 and WAV hard decode. Support the industrial-level serial communication protocols. You can use SPI FLASH, TF cards, or USB flash drives as storage media for voice storage.
By using simple serial port commands, it is possible to play the specified voice or how to play in a convenient way. Stable and easy to operate.
Specification
MP3,WAV File
Format
Support
rates 8-44.1K and 8-320kbps
USB Port
2.0
Standard
UART port
Standard
serial port, 3.3 TTL level, baud rate 9600
Input Voltage
DC3.3-5V
(Recommend 4.5V)
Rated Current
Working
Current:10MA
PCB Size
50x50
mm
Work Temperature
-10~65 ℃
Humidity
5%~95%
Storage
maximum
128Mbit FLASH, standard built in 32Mbit flash memory
Features
1. Support MP3 WAV file playback with a sampling rate of 44.1K and 320KBPS.
2. The signal-to-noise ratio can reach 85dB.
3. Support UART asynchronous serial port communication, Baud 9600 (can be changed to 115200), support file playback, volume adjustment, music selection playback, file insertion, etc.
4. Support 512k-32G TF/SD card and USB flash drive, and connect to a computer to replace TF card voice.
5. It can be connected to 4 Ω 3W speakers or 8 Ω 2W speakers which is also larger than 2W based on 8 Ω device.
6. Use the 2.54MM standard pin header, which is hard, aesthetic, and hard to break.
Details
Pin No.
Pin Item
Type
Functional Description
1
BUSY
IO
Play status pin
2
MTXD
IO
MCU--UART
--MP3
3
MRXD
IO
MCU--UART
--MP3
4
DACR
AO
The chip DAC outputs the left channel
5
DACL
AO
The chip DAC outputs the right channel
6
SPK2
AO
External mono speaker
7
SPK1
AO
External mono speaker
8
3.3-5V
POWER
Power input (Positive)
9
USBDP
IO
USB data cable DP
10
USBDM
IO
USB data cable DM
11
IO5
/
Chip I05 input
12
IO4
/
Chip I04 input
13
IO3
/
Chip I03 input
14
GND
AGND
Power input (negative)
15
IO2
/
Chip I02 input
16
IO1
/
Chip I01 input
Circuit Diagram
Welding resistance corresponding to key function table
R3, R6, R8 represent C, B, and A
R6 R8 R3
0 0
0
Press the stop
button again during playback
0 0
1
Short press (long press play once), press the
button again after release
0 1
0
A short press is played, and the current song is
played again when the key is pressed after the song is played
0 1
1
Short press (long press play once), can interrupt
play repeatedly
1 0
0
Low level keeps loop playing, high level stops
playing
1 0
1
The low level keeps the play stopped once
1 1
0
The 5 keys are loop play/pause volume plus or minus
level keep loop loose stop random loop play
1 1
1
The five buttons are
respectively to play the next loop volume reduction cycle pulse, which can
interrupt the playback, press down, and then press down to stop
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