在以单片机开发的仪器设备上，仪器采集的数据有时需要在微机上进行处理，但当采集的数据量较大时，通过串行通信向微机传送数据时间长，特别在许多实时场合采用串行通信不能满足要求。如果改为并行通信不仅可以满足实时要求而且可大大提高通信效率。本文通过对ＭＣＳ—５１单 In the development of SCM equipment, the instrument collected data sometimes need to be processed on the computer, but when the amount of data collected by the serial communication to the computer to transfer data for a long time, especially in many real-time occasions using serial Communication can not meet the requirements. If instead of parallel communication can not only meet the real-time requirements but also greatly improve the communication efficiency. This article through the MCS-51 single