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CC3220MODA: The settings for GPIOOUT0/GPIOOUT1 on the XDS110 to toggle nRESET for CC3220MODA

Guru 16800 points
Part Number: CC3220MODA
Other Parts Discussed in Thread: UNIFLASH, TMDSEMU110-U

Hello,

We're trying to use GPIOOUT0/GPIOOUT1 on the XDS110 to toggle nRESET for CC3220MODA.
Although we observed these signals when clicking "connect" of Uniflash, we could see any change or toggle.
Are there any settings to use GPIOOUT0/GPIOOUT1 as the reset signal for CC3220MODA?

Best Regards,
Nomo

  • Hi Nomo,

    Are you using the XDS110 on a CC32xx launchpad or are you using a standalone XDS110 debugger? There shouldn't be any additional settings that need configuration if you are using Uniflash, as it should send the correct commands to the XDS110 to toggle the GPIOs.

    How do you have the GPIOs connected to the CC3220MODA? Have you taken a look at the CC32xx launchpad schematics to see how the reset circuitry is designed?

    Regards,

    Michael

  • Hi Michael-san,

    We are using a standalone XDS110 debugger (TMDSEMU110-U).

    We've referred the CC32xx launchpad schematics; however, the XDS_nRESET signal output from PA6 of TM4C1294 (XDS110).
    So, we cannot know which GPIO output corresponds (GPIOOUT0 or GPIOOUT1 of TMDSEMU110-U) to PA6.

    In any case, we couldn't observe the reset signal from GPIOOUT0 and GPIOOUT1 of TMDSEMU110-U with UniFlash.

    Best Regards,
    Nomo

  • Hi Michael-san,

    We found that GPIOOUT0 output the nRESET signal if we connect the nRESET of debugger's JTAG connecter to the CC3220MODA's nRESET pin.
    Is this connection correct?

    Best Regards,
    Nomo

  • Hi Michael-san,

    Do you have any update on this thread?
    Our customer wants to fix the hardware design in a hurry.
    So, it would really appreciate it, if you would check the connection I described.

    Best Regards,
    Nomo

  • Hi Nomo-san,

    If you observe the nRESET of debugger connector carrying the reset signal when you use Uniflash, then it is likely that the correct signal to wire up to the nRESET of the CC3220MODA is actually nRESET, and not GPIOOUT1 or GPIOOUT2.

    If you run the xds110reset.exe utility in uniflash_6.1.0\simplelink\imagecreator\bin, which pin do you see get toggled?

    After doing some tests, it appears that is the tool that Uniflash uses to directly assert reset on the launchpads. As the documentation here explains, that will assert nRESET: https://www.ti.com/lit/sprui94/

    Regards,
    Michael

  • Hi Michael-san,

    Thank you for your reply.
    If we had additional question, we'll create another post.

    Best Regards,
    Nomo