This edition is suitable for ADAU1401/1701/1702 learning and product use. The ADAU1401 is more stable than the ADAU1701 in the harsh working environment of -40°-105° (the ADAU1701 is generally 0-70°). The program can be used ly and other indicators are the same. The ADAU1401 is a complete single-chip with built-in 28/56-bit SP, ADC, AC and microcontroller-like control interface. Signal processing techniques including equalization, crossover, bass , multi-band ynamic processing, elay compensation, speaker compensation, and stereo widening can be used to for the practical limitations of speakers, amplifiers, and listening environments, ramatically improving the sound quality experience. Two ADCs and four ACs provide 98.5 B of analog input to analog output ynamic . Seamless connection to other ADCs and ACs is possible with igital input and output ports. The ADAU1401 communicates over an I2C bus or a four-wire SPI port. The ADAU1401 program can be loaded from the EEPROM through its self-booting mechanism at power-up or from an external microcontroller. When turned , the current state of the parameter can be written back to the EEPROM from the ADAU1401 to be recalled the next time the program is run. It has self-starting after power-on and can be completely separated from the single-chip . Leads to all function ports, which can expand igital I2S input/output/key function/LED rive/auxiliary ADC (potentiometer analog)/ adjustment.