Description: The ISD4004 series voltage is 3V, the monolithic recording time to 16 minutes, good sound quality for mobile phones and other portable electronic products. Chip using CMOS technology, contains the oscillator, anti-aliasing filter, smoothing filter, audio amplifier, automatic squelch and high-density multi-level flash storage display. The chip design is based on all operations must be controlled by the microcontroller, operation command can be fed via a serial communications interface (SPI or Microwire).
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Voice chip.docx
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