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本文介绍了以MCS -8031单片机为核心组成的下位管理、收款机及IC卡作为数据载体的小规模销售系统。本系统有两种工作方式 :PC机加该系统的二级销售方式及小规模销售系统独立工作的一级销售方式。本文重点介绍下位管理、收款机的工作原理、硬件实现和技术特点 ,最后介绍了采用二级销售方式时下位机RS485的硬件实现和有关技术问题。
This article introduces a small-scale sales system that uses MCS-8031 microcontroller as the core component of lower management, cash registers and IC cards as data carriers. There are two ways of working in this system: the PC adds the secondary sales method of the system and the primary sales method of the small-scale sales system works independently. This article focuses on the work principle, hardware implementation and technical characteristics of the lower management, cash registers, and finally introduces the hardware implementation and related technical issues of the lower level RS485 when using the secondary sales method.