资料下载
×
运用C5xx 80C5xx系列的存储体开关实现程序存储器容量
消耗积分:5 |
格式:rar |
大小:135 |
2009-06-30
王树林
分享资料个
In some applications, using the 80C5xx/C5xx architecture, there is a need for more than64 kByte external program memory space. This request becomes more and more
important due to the increased usage of the high level language C51.
The following apnote proposes a solution with a standard device 74HC257 used as
external glue logic to solve the 64 kByte boundary problem for the external program
memory.
1 Introduction3
2 Memory Organization 3
2.1 External Memory Organization in ´Normal Configuration´ 3
2.2 External Memory Organization in ´Expanded Configuration´ 4
3 Hardware Description 6
4 Software Proceeding for ´Expanded Configuration´ 8
5 Timing Considerations concerning the External Program Memory Access 9
6 Conclusion 10
important due to the increased usage of the high level language C51.
The following apnote proposes a solution with a standard device 74HC257 used as
external glue logic to solve the 64 kByte boundary problem for the external program
memory.
1 Introduction3
2 Memory Organization 3
2.1 External Memory Organization in ´Normal Configuration´ 3
2.2 External Memory Organization in ´Expanded Configuration´ 4
3 Hardware Description 6
4 Software Proceeding for ´Expanded Configuration´ 8
5 Timing Considerations concerning the External Program Memory Access 9
6 Conclusion 10
声明：本文内容及配图由入驻作者撰写或者入驻合作网站授权转载。文章观点仅代表作者本人，不代表电子发烧友网立场。文章及其配图仅供工程师学习之用，如有内容侵权或者其他违规问题，请联系本站处理。 举报投诉
评论(0)
发评论
- 相关下载
- 相关文章
