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  #1  
Old 10-05-2017, 01:59 PM
suteny0r suteny0r is offline
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Default Can't get ID from SBG6580

I've used this clip
http://www.ebay.com/itm/3M-SOIC-16WA...EAAOSw0kNXgTzh

with several SB6120. I'm trying to use it with SBG6580, but id says unrecognized flash, returning 00's FF's or 9F's

I carefully followed the pin list from this thread
http://www.usbjtag.com/jtagnt/modem/sbg6580.php
and am using usbjtag pin4 instead of pin1 for the back-of-board connector, and buzzed out each line with a meter. all lines were correct.

I soldered a tiny wired on the back of board point (which, by the way is mislabeled - the label referred to is that of an SB6120. But I followed the photo to select the pad. I also verified that I'm reading 3.3v on that wire.

I verified my usbjtagnt is working with an SB5100 in jtag mode.

I'm using USB JTAG NT software version 0.81 configured for target SBG6580SPI

Is it possible for my usbjtagnt to malfunction in SPI mode only?

I cleaned the clip contacts with alcohol, and re-seated the clip a few times on the flash chip. I made sure the clip was pushed all the way down nose flush with board.

Unknown flash type!
Report these values http://www.usbjtag.com/vbforum ff,ff,ff

How can I troubleshoot this problem?
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  #2  
Old 10-05-2017, 04:07 PM
usbbdm usbbdm is offline
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Yes you can have working JTAG mode but malfunction SPI mode. You might have burnt one or two pins of CPU which is not used for JTAG.
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  #3  
Old 10-05-2017, 08:55 PM
suteny0r suteny0r is offline
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I re-tested it on an SB5100, still works.

I tested with SB6120 - same symptom. can't ID it. Sounds like the SPI portion no longer works. would be nice if usbjtag NT could do a self-test to spot this kind of problem.

I haven't been careless, but I have had it for quite a while. Is it repairable? Should I just buy another one? I got this one from sbxx2009@blueyonder.co.uk on ebay. 5/4/2010 lol I guess 7 years isn't a bad lifespan.
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  #4  
Old 10-06-2017, 10:01 AM
usbbdm usbbdm is offline
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Quote:
Originally Posted by suteny0r View Post
I re-tested it on an SB5100, still works.

I tested with SB6120 - same symptom. can't ID it. Sounds like the SPI portion no longer works. would be nice if usbjtag NT could do a self-test to spot this kind of problem.

I haven't been careless, but I have had it for quite a while. Is it repairable? Should I just buy another one? I got this one from sbxx2009@blueyonder.co.uk on ebay. 5/4/2010 lol I guess 7 years isn't a bad lifespan.
If you are handy it can be repaired yourself by replacing the main CPU.
JTAG is testing involves the contacting two devices with wires. If you are not careful, there is big chance you can kill the device. That is why there is RED notes in the first page of the user manual.
"Only power on the JTAG (or BDM) and the target AFTER the JTAG (or BDM) and the
target are connected. Connecting the JTAG (or BDM) and the target with either of their
power on could burn either the JTAG (or BDM) or the target."
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  #5  
Old 10-06-2017, 05:33 PM
ricktendo ricktendo is offline
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You need to get an external source for 3.3v, like a UART board
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Tags
clip, sb6120, sbg6580, sotc, unknown flash type

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