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给出了应用ＭＣＳ－５１单片机芯片８０３１开发的２５６路程控数字式时分交换机系统的软件和硬件设计。整个系统的软件和硬件采用模块化设计。硬件主要芯片选用了Ｉｎｔｅｌ８０３１和ＭＴ８９８０Ｄ，软件由汇编语言编写
The software and hardware design of 256-channel programmable digital time-division switch system developed by MCS-51 single-chip 8031 is given. The entire system software and hardware modular design. The main hardware chips used Intel8031 and MT8980D, the software written in assembly language