PCA9555及其在电力系统监控产品中的应用

Using PCA9555 in telesignalization in monitor system for power system

针对电力系统监控产品中遥信的实现需要占用较多系统资源的问题,通过分析其实现方法,结合基于I^2C总线带中断输出的IO扩展芯片的特点,提出了一种基于PCA9555的遥信实现方法。通过产品验证,达到了设计目的。该方法具有实用简单、扩展灵活等优点。

In monitoring system for power system, it usually takes lots of system resources for the realization of telesignalization. By analyzing the realization method and studying the characters of the IO extension chips based on I2C bus with interrupt output, a realization method by using PCA9555 was proposed. After using this chip on real products, it verifies the design purpose, and also, it has the character of easy to use, flexible in extension.