Separate analog, digital and IO power supply; serial data and control interface (SPI).

1 headphones and audio output interface, the internal PLL clock frequency multiplier; high-quality stereo DAC, 16-bit adjustable-chip ADC, high-quality stereo earplugs drive

A microphone for recording, support for recording encoding format: IMA ADPCM (monaural).

1 ine_in input interface supports two input methods; supports MP3 and WAV streams.

Separate analog, digital and IO power supply

On-board 3.3V and 2.5V LDO chip AMS-1117, the largest current provide of 800mA.

Single power supply: +5 VDC, capacitor filter.

12.288 MHz crystal.