本文以Atmega161 加少量外围电路构成的LED 数字显示表头为例,介绍PIC 单片机 智能表头的硬件电路原理和软件编程方法,并给出了用三菱公司的FX 系列PLC 编制的单表显示例程和Atmega161 的控制显示流程图。 [关键词] 数码显示表头、 Atmega161 单片机、 PLC Abstract: This article adds LED numeral Digital Display Instrumentation Cone take Atmega161 which the few periphery electric circuit constitutes as an example, Introduces the PIC monolithic integrated circuit intelligence table head the hardware circuitry and the software programming method And produced establishment list has extolled the demonstration regulation and the Atmega161 control demonstration flow chart with Mitsubishi Corporation's FX the series PLC. Key words: Digital Display Instrumentation Cone、Atmega161 SCM、PLC