为什么sys_reset保持低位？

你在'sys_reset'上有一个上拉电阻吗？
------------------------------------------“如果它不起作用
模拟，它不会在板上工作。“



以下为原文

Do you have a pull-up resistor on 'sys_reset'?

------------------------------------------
"If it don't work in simulation, it won't work on the board."

好点子。
不，我不....但为什么上电时没关系，重置时不行？



以下为原文

good point. No, I don't.... but why is it ok at power-up and not ok on reset?

sebastianro写道：
好点子。
不，我不....但为什么上电时没关系，重置时不行？
如果没有看到板级复位逻辑图，那将很难回答。
-  Gabor
-  Gabor



以下为原文

sebastianro wrote:
good point. No, I don't.... but why is it ok at power-up and not ok on reset?

That would be very hard to answer without seeing a diagram of your board-level reset logic.
 
-- Gabor
-- Gabor

塞巴斯蒂安
如果您想节省时间，建议您发布电路板原理图以供审核。
如果您使用'示波器检查信号，请发布波形照片，并描述'示波器和探头（低带宽示波器或探头可以解释奇怪的波形）。
另外，确保已将示波器探头接地到正在探测的电路板上。
没有正确接地的示波器探头会使波形看起来非常嘈杂。
这是两个月前你最后一个帖子中讨论过的Spartan-6设计吗？
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。



以下为原文

Sebastian,
 
If you want to save time, suggest you post your board schematics for review.
 
If you check signals with a 'scope, please post photos of the waveforms, and describe the 'scope and probes (a low-bandwidth scope or probe would explain odd-looking waveforms).  Also, make sure you have grounded the scope probe to the circuit board you are probing.  A scope probe which is not properly grounded will make the waveform look extremely noisy.
 
Is this the same Spartan-6 design discussed in your last thread, about two months ago?
 
-- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369

Summary:
1. Read the manual or user guide.  Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts.  If I write a good post, then I have been good for nothing.