This recording module realizes the functions of specified file
name, file index recording and playback in specified folder, adding
specified file directory playback in specified folder, deleting
specified file name, stopping recording and playback, fast forward
and fast backward function, setting playback volume command,
reading SD card status, querying SD card capacity, etc.
Product characteristics:
1. Support WAV, MP3 (48KHZ, 320Kbps) high-quality audio format
playback, beautiful sound quality
2. A SPI interface.
3. Built-in RC oscillator and watchdog timer, power-on automatic
reset
4. Two full-duplex asynchronous serial interface, support standard
UART asynchronous serial communication, flexible control.
5. An SD card interface, which can be connected to SD cards to
support 32G
6. A USB 2.0 interface, supporting USB TOG, external U disk maximum
support 32G
7. Supporting FAT, FAT32 File System
8.9-way 10-bit ADC, can expand the AD button up/down, play/pause,
record/stop recording, stop playing, volume +/-and so on.
9. A 1W power amplifier is built in the module.
10. Power supply voltage: 5V→3.3V