在智能化仪表、微机应用系统中,经常要记录采集数据或工作执行时间。日历时钟芯片M5832由于具有功耗低、功能齐全,易于调整的特点,因此为我们使用提供了很大方便。M5832接口硬件电路常接Z80—PIO,以实现其功能,这是一种典型应用。但是在实际应用中,Z80—PIO两个I/O端口A、B往往被A/D转换、控制电路所占用。为此我们设计另一种接口电路实现了M5832的功能。如图接口硬件采用74LS237、 In intelligent instruments, computer applications, often to record the acquisition data or work execution time. Calendar clock chip M5832 because of low power consumption, fully functional, easy to adjust features, so for our use of a great convenience. M5832 interface hardware circuit often connected Z80-PIO, in order to achieve its function, this is a typical application. However, in practical application, the two I / O ports A and B of the Z80-PIO are often A / D converted and occupied by the control circuit. For this reason we design another kind of interface circuit and realized the function of M5832. Figure interface hardware using 74LS237,