isd4004语音芯片，stm32控制，功能是录一段放一段，录的地址是一样的，掉电后录的还存在，这是个最简单的录放程序。-isd4004 voice chip, stm32 control function is to record a put a recorded address is the same, there are still recorded after power, which is the most simple recording program.