基于存储器动态刷新的多路模拟量输出系统  

A dynamically refreshed multi-analog output system based on memory

作　　者：刘清[1] 

机构地区：[1]南京师范大学计算机科学系,南京210042

出　　处：《电测与仪表》2003年第1期58-60,40,共4页Electrical Measurement & Instrumentation

摘　　要：针对多通道、慢速率的模拟量输出系统的特点,作者设计一个基于存储器动态刷新的多路模出系统,该系统采用64个输出通道共用一个D/A,刷新不占用CPU时间,由控制电路产生,通过CPU和控制电路共享存储器实现模拟量的输出保持和更新。This paper discusses the design of a multi-analog output system which contains64analog output sharing one DAC converter.The memory-refresh is accomplish by a control circuits which share the same memory with the CPU resulting in occupying no CPU time.The solutions involving such problems as the conflict between data and ad-dresses,the generation of address refreshing and the accuracy of DAC converter are of-fered in the paper.

关 键 词：多路模拟量输出系统 动态刷新 存储器共享 数据分配 

分 类 号：TP335[自动化与计算机技术—计算机系统结构]