计算机与现代化 ›› 2011, Vol. 193 ›› Issue (9): 112-115,.doi: 10.3969/j.issn.1006-2475.2011.09.030
• 计算机控制 • 上一篇 下一篇
王绍举
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WANG Shao-ju
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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。
关键词: PC/104总线, CAN总线, SJA1000
Abstract: 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.
Key words: PC/104 Bus, CAN Bus, SJA1000
中图分类号:
TP273
王绍举. PC/104扩展SJA1000控制器简易方法[J]. 计算机与现代化, 2011, 193(9): 112-115,.
WANG Shao-ju. Simple Method of SJA1000 Controller-extending Based on PC[J]. Computer and Modernization, 2011, 193(9): 112-115,.
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http://www.c-a-m.org.cn/CN/Y2011/V193/I9/112
