使用51单片机AT89S52模拟SPI通讯来控制ISD4003语音芯片，来实现录音和放音功能。-51 AT89S52 microcontroller using SPI communication to the control simulation ISD4003 voice chip, to achieve the recording and playback functions.

基于51单片机的ISD4003多段语音录放实验. 控制IC: AT89s52,isd4003,LM386, 系统晶振：12MHz -Based on 51 single-chip ISD4003 voice recording multi-stage experiment control IC: AT89s52, isd4003, LM386, system crystal: 12MHz