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Original question:

MSP432P401R: Using Launchpad XDS110 to program external MSP432P401R

MSP432P401R: MSP low-power microcontroller forum

Vidushi gupta
Prodigy 30 points

Part Number: MSP432P401R

Hi Team

I am facing an error with Error code -261 and i have exactly understood why i am getting this error, as i got succeeded to replicate this error in launchpad.

I am facing this error because i have used LDO operating mode in the circuit of custom board having MSP432P401RIRGCT as target device, leaving the VSW pin unconnected as recommended in datasheet and shown in attached image.

 

I am unable to understand what are correct sysconfig to get the DUT work in LDO operating Mode.

On removing L1 and C10, i was succesful in reproducing the same error in launchpad, the LDO config i used is suggested in the below thread by James Evans, but the error persists.

https://e2e.ti.com/support/microcontrollers/msp430/f/166/p/918268/3393792#3393792

Please suggest me how to resolve this error.

  • 0
    TI__Genius 17960 points

    Hi Vidushi,

    did you check the supply and other signals with the scope, just to make sure the voltage levels are correct and there are no oscillations or ringing on the signals? Could you please provide respective scope shots?

    Best regards

    Peter

  • 0 in reply to Peter Spevak
    Prodigy 30 points

    Yes checked.

    I am sure it is not the power or other signal issue.

    I have reproduced the same error in Launchpad by just removing L1 and C10

    When i resoldered back both the components again, everything started working fine in launchpad.

    So the error is caused by these two components as i am operating my custom board in LDO mode, where both of these components are not populated.

    You can also reproduce the same issue in launchpad by removing L1 and C10 as recommended for LDO operation in datasheet. (VSW Pin is left unconnected and 100nf capacitor is enough for vcore for LDO mode as stated in datasheet)

    If you try using DC DC software configuration with LDO hardware connections, the also the same error will occur.

    So the issue is that i am unable to find correct LDO software configuration.

    Is there any document/guide to assist me how to use msp432 in LDO operating mode?

  • 0 in reply to Vidushi gupta
    TI__Genius 17960 points

    Hello Vidushi,

    could you please try this code example, which should at least from the SW side make sure you're operating the device correctly.

    Best regards

    Peter

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