Spartan IIE XC2S50E初始化后驱动巨大的核心电流

我认为你的意思是VCCINT，而不是VCCINIT。
这是一个新的未经证实的董事会吗？
你有没有检查过裸板？
FPGA是否在电路板上正确组装（提示：如果旋转90度或180度，将发生电流！）
你有一块板子，还是多块板子？
如果不止一个，他们都表现得一样吗？
如果它们都表现相同，那么您可能有一个boad设计或电路板工厂问题。
您可能遇到电路板装配问题，但通常电路板装配问题并不完全一致。
如果几个中只有一个板有这个问题，那么它可能是一个装配错误（不明确，只是一个猜测）。
如果一堆FPGA输出短接到VCCINT平面，那么在配置之后可能不会发生巨大的电流消耗。
VCCINT平面的通孔间隙不足可以做到这一点。
只是一个猜测。
同样的问题适用于短接到GND或VCCINT层的输出（由VCCO提供），这也会使VCCO电流达到峰值。
合理的解释：在装配板上错误注册的电源层。
- 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。
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以下为原文

I think you mean VCCINT, not VCCINIT.
 
Is this a new, unproven board?  Have you checked bare board for shorts?
 
Is the FPGA assembled correctly on the board (hint: if rotated 90 or 180 degrees, current will happen!)
 
Do you have a single board, or multiple boards?  If more than one, do they all behave the same?  If they all behave the same, you probably have a boad design or board fab problem.  You might have a board assembly problem, but usually board assembly problems aren't utterly consistent.  If only one board out of several have this problem, then it's likely an assembly error (not definite, just a guess).
 
If a bunch of FPGA outputs are shorted to the VCCINT plane, huge current draw might not happen until after config.  Inadequate via clearance at the VCCINT plane could do this.  Just a guess.  Same problem applies to outputs (supplied by VCCO) shorted to GND or VCCINT layer, which would also spike VCCO current.
 
Plausible explanation:  mis-registered power plane layer in fabricated boards.
 
- 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.

感谢鲍勃的回复。
我们只有一个董事会。
虽然它是我们的第一篇文章，但它已经被客户证明了设计。
没有Bear Board Shorts，我们确实验证了它。
FPGA引脚方向是正确的。
电路板上仅使用一个FPGA，而LDO稳压器ckt的1.8V电源仅用于此FPGA。
仅在配置FPGA后，电流才会增加到4.8A。
我目前正在研究这些Spartan系列的Power On Surge（POS）问题。
你对此有什么建议吗？
RGDS，
阿尼斯



以下为原文

Thanks Bob for the reply.
We do have only one Board. Though its First Article for us, its been already proven Design by the Customer.
There are no Bear Board Shorts, we did verify it.
FPGA Pin Orientation is correct.
Only one FPGA is used on the Board and 1.8V supply from LDO Regulator ckt is used exclusively for this FPGA only.
The current increases to 4.8A only after the FPGA is configured. 
I am currently looking at Power On Surge (POS) issue with these series of Spartan. Do you have any suggestion on this.
 
Rgds,
Anis
 
 

你描述的问题非常严重 - 一个显示阻止。
我的建议是建造（组装）另外2-3块板 - 无论如何你都需要它们。
建立一个“第一项”是一个主要的风险。
您不知道电路板，组件，FPGA设计或原理图设计是故障还是导致故障。
这是我的建议：重新构建FPGA设计，所有输出均为三态。
如果当前绘制持续存在，这将消除用户IO从您的问题源列表中（直接或间接）缩短供应。
如果电流消耗不存在，请使用消除过程来查找问题输出或引脚。
慢慢地，小心地工作，并有第二组眼睛审查和仔细检查你的工作 - 你不能承担错误。
在上电时，在配置之前，如何连接HSWAPEN引脚？
- 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。
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以下为原文

The problem you describe is quite serious - a show-stopper.
 
My advice is to build (assemble) another 2-3 boards - you're going to need them anyway.
 
It is a major risk to build just one "first item".  You have no idea whether the board, the assembly, the FPGA design, or the schematic design is either at fault or contributing to the fault.
 
Here's my suggestion:  Re-build the FPGA design with all outputs tri-stated.  If the current draw persists, this would eliminate user IOs shorting a supply (either directly or indirectly) from your list of problem sources.  If the current draw does not persist, use process of elimination to find the problem outputs or pins.  Work slowly and carefully, and have a second set of eyes review and double-check your work -- you cannot afford errors.
 
At power-on, before config, how do you have the HSWAPEN pin tied?
 
- 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.

谢谢你快点。
我没有能力重新设计FPGA。
我们收到了客户的编程Flash。
当Flash未编程时，我们没有看到Short。
只有在安装了编程的Flash后才能看到高电流。
HSWAPEN引脚是什么意思 - 热插拔是什么？



以下为原文

Thanks for the quick one.
I do not have the capability of redesigning the FPGA. We have received a programmed Flash from the Customer. When the Flash is not programmed we did not see the Short. The High current is seen only after the programmed Flash is installed.
 
What do you mean by HSWAPEN pin - is it Hot-Swap??

如果您没有用于对此板进行故障排除的工具或材料，则您的客户必须执行此操作。
期待任何其他决议是不合理的。
你不能靠自己成功，修补电路板并可能导致一个可能掩盖原始问题的新问题是一个坏主意。
- 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

If you do not have the tools or materials for troubleshooting this board, your customer will have to do this.  It is unreasonable to expect any other resolution.  You cannot succeed on your own, and it would be a bad idea to tinker with the board and possibly cause a new problem which might obscure the original problem.
 
- 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.