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Original question:

CCS/TMS570LC4357: Unable to fix JTAG Error "The value is '-233' (0xffffff17). The title is 'SC_ERR_PATH_BROKEN'."...

XDS110ISO-EVM: Unable to fix JTAG Error "The value is '-233' (0xffffff17). The title is 'SC_ERR_PATH_BROKEN'.

bhuvana Vusa
Prodigy 10 points
Part Number: XDS110ISO-EVM

Tool/software:

When using the XDS110 debugger for code flashing, the JTAG IR and DR scan paths are unable to circulate the bits in the following configurations:

  • Normal JTAG configuration
  • 4-pin cJTAG configuration
  • 2-pin cJTAG configuration in advanced mode

The same error is reflected across all configurations. Later, even when connected using the serial number, the same error persists. I also used the LaunchPadXL (F280049C) as a standalone debugger, and the same error replicated. And even tried to removing pull-up and pull-down resistors from mcu(F280049C) custom board and tried to flash the code, same error replicated.

I am sharing a screenshot related to the error with this query. I am stumped. What should I do now to resolve the error? Kindly provide me with a solution.

Thanks,

Bhuvana.

  • 0
    TI__Mastermind 34396 points

    Hi,

    Have you looked through this app note? https://www.ti.com/lit/pdf/spracf0

    The header for the XDS110ISO-EVM is different than the standard header. Please be extra careful that you are connecting the pins correctly. 

    Thanks,

    Ben Collier

  • 0 in reply to Benjamin Collier
    Prodigy 10 points

    Hi,

    I followed the app note and the same error persists. Here are the issues I'm facing:

    1. We have a 14-pin JTAG on the MCU end and a 10-pin JTAG on the launchpad side. How should we connect these? I tried removing the shunt connection on the launchpad (J102) and used as standalone debugger to flashing the code, but the same error occurs.

    2. Using an external debugger (XDS110ISO-EVM), the MCU end has a 14-pin connector, and the debugger adapter side has a 16-pin connector. How do we interface these for flashing the code?

    I'll attach the JTAG schematic for your reference. please provide me the solution.

    Thanks,
    Bhuvana

  • 0 in reply to bhuvana Vusa
    TI__Mastermind 34396 points

    Hi,

    bhuvana Vusa said:

    • We have a 14-pin JTAG on the MCU end and a 10-pin JTAG on the launchpad side. How should we connect these? I tried removing the shunt connection on the launchpad (J102) and used as standalone debugger to flashing the code, but the same error occurs.

    • Using an external debugger (XDS110ISO-EVM), the MCU end has a 14-pin connector, and the debugger adapter side has a 16-pin connector. How do we interface these for flashing the code?

    I am finding it hard to follow which headers that you have on which boards.

    The important thing for connecting to F280049C with 4-pin JTAG is that TCK,TMS,TDO,TDI, 3.3V and GND are connected correctly. Please double check the pinout of your header and target board to make sure that these are connected correctly. 

    Best Regards,

    Ben Collier