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CC2642R: Developed on CC2642R-Q1 but production is CC2642R. Works with Q1 but not CC2642R: [ERROR] IcePick_C: Error connecting to the target: (Error -2131 @0x0)

Randy Hellman
Prodigy 50 points
Part Number: CC2642R
Other Parts Discussed in Thread: , UNIFLASH, CCSTUDIO, LAUNCHXL-CC26X2R1

I have developed a custom wearable device that due to part availability was prototyped with the CC2642R-Q1. For production ramp up we are using the CC2642R and currently experiencing errors in UniFlash. In UniFlash I'm seeing [ERROR] IcePick_C: Error connecting to the target: (Error -2131 @0x0). I've tried everything recommended in JTAG debugging here -> https://software-dl.ti.com/ccs/esd/documents/ccs_debugging_jtag_connectivity_issues.html#device-register 

We received a very large qty of the CC2642R and are seeing the error across all of them. At what point can I say that these devices were received dead on arrival since everything works when I use the CC2642R-Q1? 

Thank you,

Randy 

  • 0
    Intellectual 275 points

    Hi Randy,
    If there is an Error by UniFlash, you can try Flash Programmer 2.

  • 0
    TI__Guru**** 202226 points

    Hi Randy,

    Other than trying Flash Programmer 2 and CCStudio as well, can you send some of the CC2642R device markings for us to review?  Where did you purchase the devices from?  Have you had your board design reviewed by TI?  https://www.ti.com/tool/SIMPLELINK-2-4GHZ-DESIGN-REVIEWS 

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    Prodigy 50 points

    Hi Ryan,

    It's looking more like there could be an issue with the received CC2642R1s. Currently, the first 20 on the reel are all failing. When we swap in a CC2642R-Q1 and the CC2652R1 from a LAUNCHXL-CC26X2R1 they both work as expected.  

    Monitoring the VDDR pin (45) on the problem CC2642R1 starts at 3.28V and then goes down. The DCOUPL pin 23 starts at less than 1.0V and goes down.

    I've attached an image of the device with the marking below. 

    I'll also begin the process for a design review but given that everything works as expected with other CC26x2 devices I feel like it's probably not the issue. I'm working on determining the origin of the components but it was through our buyer. Once I get more details I'll upload them here. 

    Thank you,

    Randy 

  • 0 in reply to Randy Hellman
    TI__Guru**** 202226 points

    Have you tried swapping one of the defunct CC2642R1F devices onto a LAUNCHXL-CC26X2R1?  Regardless this is sounding more like a quality issue from the provider, please supply more details when able.

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    Prodigy 50 points

    That's in process, I will update shortly. Are you able to determine anything from the device markings?

    Thank you

  • 0 in reply to Randy Hellman
    TI__Guru**** 202226 points

    Nothing outside of ordinary expectations.

    Regards,
    Ryan

  • 0 in reply to Ryan Brown1
    Prodigy 50 points

    Hi Ryan,

    I believe we may be dealing with some fakes. Comparing the CC2642 from the supplier in question and the working ones from digikey the fonts are different. 

    The working CC2652R1 and CC2642R-Q1 are san-serif and the CC2642R1 is serif. The CC2642R1 in question which I'm now fairly confident is a fake is the san-serif shown above. How consistent is the font or does that depend on each batch? 

    Thank you,

    Randy 

  • 0 in reply to Randy Hellman
    TI__Guru**** 168367 points

    Randy,

    Please apologize for the delay; this thread slipped under my radar.

    I am checking with someone more experienced in the part marking to gather his experience, but I just want to confirm one detail: the photo of the working unit above is for a CC2642 non-Q1. Does the CC2642-Q1 look the same?

    The part marking is mentioned in the Packaging information section of the CC2642-Q1 datasheet.

    Regards,

    Rafael