ISD4004 interface module circuit

Published:2011/6/19 3:14:00 Author:John | Keyword: interface module | From:SeekIC

It can be seen from the figure that the circuit design is very simple. SPI port of ISD4004 SPI is directly connect with the microcontroller's SPI port. The ADUOUT of ISD4004 is directly connected to the audio output. A capacitor is placed on the audio output pin in order to achieve improvement of voice quality. ISD4004 audio output is connected with MICPHONE with the differential approach. ISD4004 interrupt output is pulled up through a resistor, then is connected with the microcontroller. The RAC pin of ISD4004 is for connecting with the general I / O port of MCU. As a result, the pin state can be controlled by the microcontroller.



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