Based on a brief description of these processors, we have analyzed the timings of multiplexed BCD output and serial output of ICL7135,and proposed two kinds of hardware interfaces and driving software.

• 在扼要介绍了两者性能的基础上 ,分析了ICL7135多路BCD码分时输出及串行输出的时序 ,提出了两种硬件接口电路及软件驱动程序。