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Original question:

LP-EM-CC2340R5: Unable to program CC2340 device via XDS110 debugger

CC2340R2: Locked Device - Can't program/erase flash

Luke
Expert 3750 points
Part Number: CC2340R2
Other Parts Discussed in Thread: UNIFLASH, LP-XDS110ET, CC2340R5

Tool/software:

Hi team,

Customer provided 5 PCBAs with CC2340R2 to their programmer vendor and they are able to read registers but can not program/erase flash. When they tried to program flash, the chip was locked. They have not been able to erase and unlock the chip.

They tried roll back with LP-XDS110ET + Uniflash to erase and unlock but failed. They've locked 3/5 PCBAs so they've stopped for now to avoid locking the rest. 

Would they be able to follow the same steps as in the related thread from a few years ago for CC2340R5 to unlock the device? I would assume they are running into essentially the same issue. 

If not, can we provide any other directions on how to unlock the devices?

Thanks,
Luke

  • 0
    TI__Guru**** 217367 points

    Hi Luke,

    Can you please have the customer confirm that they are observing the exact same issue from the other thread?  Provide screenshots of the behavior if possible.

    What SimpleLink F3 SDK version is the customer using to program these devices?  Can they confirm using Uniflash that their IC revision is RevB/PG2?  Have they had their custom board reviewed using SIMPLELINK-2-4GHZ-DESIGN-REVIEWS with special consideration for the JTAG lines?

    I'm doubtful that the same issue is involved, but will know more after getting further details.

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    TI__Expert 3750 points

    Hi Ryan,

    I am having trouble (but still working) on getting these particular answers from the programmer vendor. However, they did respond and said the following:

    "The problem is that once I operate the FLASH register on the chip, the chip can no longer read SWD's internal ID or use SWD to manipulate the registers.
    And I can't do anything with the LP-XDS110ET."

    Not sure if this gives you any additional idea as to what may be going on or what else we can have them try... I will let you know if we can get any more info out.

    Best,

    Luke

  • 0 in reply to Luke
    TI__Guru**** 217367 points
    Luke said:
    once I operate the FLASH register on the chip

    This isn't much more to go off of.  How are they writing to the FLASH registers and which specific registers are they changing?  Are they replicating this with TI SimpleLink SDK example code and a TI imaging tool such as CCS or Uniflash, or is their custom setup required to cause this behavior?

    Regards,
    Ryan