保证可编程芯片和单片机上电复位信号时序正确的两种方法  

The two methods that make the correct POR time sequence

作　　者：杨书华[1] 柏军[1] 

机构地区：[1]哈尔滨工业大学(威海),山东威海264209

出　　处：《电测与仪表》2003年第5期42-43,51,共3页Electrical Measurement & Instrumentation

摘　　要：首先介绍了在嵌入式系统中,CPU和可编程芯片上电复位电路不仅要满足复位时间要求,而且还要有正确的时序,保证在对可编程芯片初始化时,该芯片上电复位已经结束。然后分别介绍了用硬件法和软件法实现可编程芯片和单片机上电复位信号时序正确的实施过程。At first,we point out that in the embedded system the power-on reset(POR)circuit of CPU and EPLD should not only satisfied the request of reset time but also offer correct time sequence to make POR step finished when initializing EPLD.Then we introduced how to make the correct POR time sequence of EPLD and single-chip com-puter,using both hardware and software methods.

关 键 词：嵌入式系统 CPU 可编程芯片 上电复位 单片机 时序 软件法 硬件法 

分 类 号：TP338[自动化与计算机技术—计算机系统结构] TP368.1[自动化与计算机技术—计算机科学与技术]