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OMAP-L138: JTAG port damaged/locked

Part Number: OMAP-L138

Greetings,

I recently ordered 3 OMAP-L138 LCDK for training and testing purposes. I have successfully using those kits for a while. But suddenly, the jtag port of two out of three of the lcdk are not working now. And one of them just works fine. I can program the flash those damaged lcdk but cannot emulate it. The emulator i am using is XDS510 USB from Spectrum digital.

Furthermore, When one of my LCDK port got damaged, I ordered a JTAG isolator from Blackhawk. After a while second one lcdk port got damaged as well.

Thanks

  • It is not clear what you are asking. 

    I suspect you have done something that created an Electrical Over Stress (EOS) condition for one of more devices on the LCDK.

    We occasionally encounter issues where customers connect other circuits to our hardware development platforms and they do not properly sequence the power supplies to the various components connected together. This can be a problem because most LVCMOS device pins are not fail-safe, which means you should never apply any potential to these pins before their respective IO supply is valid. So there is a chance you could cause an EOS if you power attached devices before the LCDK. 

    Another common problem is ESD causing EOS. You should only be doing this type of work at a certified ESD workstation while wearing the proper ESD protection gear. Check your workstation to make sure it is providing proper ESD protection.

    You should also make sure all things being connected together have a common ground potential. We have also seen issues where different components are not at the same ground potential when being connected together. This can cause a problem if the signal contacts in a connector touch before the ground contacts touch. If this happens, the signal will see the signal voltage plus the ground difference voltage. You should avoid plugging or unplugging connectors while power is applied unless the connector was specifically design for hot-plugging. You should also consider suppling AC power to all connected components with their own AC power to a common switched power strip that allows you to cycle power to all components at the same time.

    Regards,
    Paul