PC/104扩展SJA1000控制器简易方法  

Simple Method of SJA1000 Controller-extending Based on PC/104

作　　者：王绍举[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《计算机与现代化》2011年第9期112-115,121,共5页Computer and Modernization

基　　金：国家自然科学青年基金资助项目(61008046)

摘　　要：PC/104是地址线与数据线分立的结构,而SJA1000则是地址线与数据线时分复用的,如何完成两种计算机体系结构的时序配合是两者扩展的关键。本文通过分析PC/104和SJA1000的操作时序,仅利用两片74245和简单的逻辑门完成电路扩展,该扩展结构中使用一条语句就可完成PC/104对SJA1000的访问控制。该扩展方法具有设计新颖、成本低、电路简单等优点,已经成功应用到某型号航天光学相机原理样机中。The data bus and address bus in PC/104 is unattached,but in SJA1000,those are time-division multiplexing,the key of expand is how to cooperate the work timing between two computer structures.The paper anatomizes the operation timing of PC/104 and SJA1000,and finishes expand with just with two 47245 and some logic gates.With this expand,only one control sentence can achieve accessing between PC/104 and SJA1000.The method is new and unique,low cost and simple,and has been used in principle prototype of spaceflight optical remote sensor.

关 键 词：PC/104总线 CAN总线 SJA1000 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]