|
![](static/image/common/ico_lz.png)
楼主 |
发表于 2009-1-16 09:21:51
|
显示全部楼层
谢谢马老师!
我还有一个问题,我现在使用AT64控制winbond 的w9968cf芯片(图像压缩编码),它在datasheet中有这样的描述
The W9968CF internal registers occupy 256-byte microcontroller address space. A special base
address (BA) setup mechanism, described as followed, is designed for the microcontroller to configure
base address for the W9968CF internal register access:
1 assert hardware reset.
2 write the key, "!" "!" "W" "9" "9" "6" "7" "!" in ASCII code, to the port xx00H.
3 the port address, xx00H, then will be used as Base Address (BA) for the microcontroller
access.
我想问下第2点是什么意思,to the port xx00H.是向xx00H.这个地址连续写key吗?
因为我总线扩展的区域是0x1100-0x11FF ,我把xx00H设置为0x1100,我向0x1100H连续写了"!" "!" "W" "9" "9" "6" "7" "!",但是还是访问不到W9968CF internal registers
麻烦马老师帮我看下,谢谢了! |
|