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Explorer
Explorer
5,270 Views
Registered: ‎06-25-2008

SP605 JTAG Problem

I had the the 605 working yesterday but now the board isn't being registered by Windows 7 and the JTAG light doesn't come on.  The CF LED is red and I'm not sure how hot the board is supposed to get but it is gettig to hot to touch.  I'm thinking the board has gone kaput.  Does anyone have any suggestions?

 

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6 Replies
Xilinx Employee
Xilinx Employee
5,260 Views
Registered: ‎01-03-2008

Re: SP605 JTAG Problem

The symptoms that you describe indicate that you have a power short somewhere on the board.  Possibly do to either overvoltaging the input supply or ESD damage.

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Xilinx Employee
Xilinx Employee
5,252 Views
Registered: ‎09-22-2008

Re: SP605 JTAG Problem

Board is getting to hot to touch indicating that some component failure or short circuit in the board. Required to debug

 

As it indicated in previous post problem might be due ESD/voltage spikes.

 

 

Some times visual inspection helps to find out any conductive dust in the board. Also failed component is very hot and sometimes color will change to black. If you observe like that any component replace that component and try once.

 

 

 

 

 

 

Mahesh
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Instructor
Instructor
5,251 Views
Registered: ‎07-21-2009

Re: SP605 JTAG Problem

Also failed component is very hot and sometimes color will change to black.

 

Also:

 

  • failed component may turn grey
  • failed component may smell like squirrel which jumped into campfire
  • failed component may emit grey or white smoke
  • failed component may start floating around on the circuit board
  • circuit board may also discolor

Suggest you wear safety eyewear when staring at the heated component(s).

 

-- 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.
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Explorer
Explorer
5,247 Views
Registered: ‎06-25-2008

Re: SP605 JTAG Problem

Thanks for the help.  Bob, I'd love to hear the story about the squirrel and the campfire. 

 

So far, no smoke and no discoloration from any parts. 

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Observer rho88
Observer
5,227 Views
Registered: ‎06-22-2011

Re: SP605 JTAG Problem

You should double check your jumpers.  Maybe start from the default state of the jumpers from the UG.  I had an issue with one of these boards in which it was showing errors in the device IDCODE when initializing my JTAG chain, which was fixed with a jumper.  Also check if there are any connections shorting on board, there are a few tightly placed components by one of the SMA connerctors that could possible cause a short.  

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Instructor
Instructor
5,224 Views
Registered: ‎07-21-2009

Re: SP605 JTAG Problem

I'd love to hear the story about the squirrel and the campfire.

 

The squirrel didn't make it. :(

 

-- Bob

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.
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