PIC12f54单片机控制的专用的回音消除程序。如果需要模块的PCB和原理图请和我联系。-PIC12f54 dedicated MCU control echo cancellation procedures. If the module PCB and schematic please contact me.

单片机MSP430F149对语音编解码芯片AIC23B的控制初始化部分的程序-MSP430F149 single-chip voice codec chip on the control part of the program AIC23B

89c52单片机控制sim900a打电话发信息-89c52 MCU sim900a call and send information