The main applied technical points on software and hardware of MCU AT90S4414 interfacing with 4 channels ultrasonic sensors and ISD2540 are introduced in details.

• 介绍了一种崭新的采用语音报距的超声波电子倒车雷达的系统,阐述了AT90S4414单片机与4路超声波探测通道和ISD语音芯片之间接口应用的软件和硬件技术要点。