All chips were connected with serial interface technology, as for chip microcomputer AT89C2051, A/D converter ADC0832,temperature sensor 18B20 as well as LCD module LCM12832ZK.

• AT89C2051单片机与串行A/D转换芯片ADC0832、数字温度传感器18B20以及图形液晶模块LCM12832ZK之间全部采用串行接口方式。