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MSP432E401Y: MSP432E401YTPDTR doesn't start up during power up

MIKHAIL SALOV
Expert 5285 points
Part Number: MSP432E401Y

Good day Colleagues,

I need your kind help with the MSP432E401YTPDTR for my customer.

He used the ТМ4С129ENCPDT but switched the MCU to the MSP432E401YTPDTR and got the same MCU behavior.

He got an issue with sturtup during power up. He tried check everything (resolder everything on a board and changed 25MHz crystal but nothing hepled).

Customer was saying, if he heat up or make MCU package colder, the MCU is starting up normally.

Could you tell me what it can be and what the customer has to check? Maybe something is preventing to execute FLASH?

Thank you, Mikhail

  • 0
    TI__Mastermind 49692 points

    Hello Mikhail,

    Thanks for posting your question to E2E.

    Is there a way to debug the device over JTAG? It would be helpful to know where the device is halting. My initial suspicion is that it's an oscillator fault but debugging will help narrow that down.

    MIKHAIL SALOV said:
    Could you tell me what it can be and what the customer has to check? Maybe something is preventing to execute FLASH?

    I'd go back to the basics. Is the supply voltage as specified? Does the behaviour happen on a new board? Is this board damaged or shorted? Are there any shorts between the solder joints? Does disconnecting/de-populating all other non-essential components around the MSP432 device affect the startup? Does a very simple blink LED program start up? Does the device work in one of our target socket boards? Have they confirmed that they are using the correct capacitance values for this device? Let's simplify these things to nail down the issue.

    Regards,

    James

  • 0 in reply to James Evans
    TI__Expert 5285 points

    Good day James,

    Could you send me E-mail? I will forward a schematics and layouts to you.

    Customer tried to check everything, only resolder of the MCU helps.

    We also checked crystals. Doesn't help.

    Thank you, Mikhail

  • 0 in reply to MIKHAIL SALOV
    TI__Mastermind 49692 points

    Hi Mikhail,

    Feel free to share the schematics and layout with me via email. However, it would be helpful if you could address my questions in my earlier post. If a new device is used on the same board and is now working fine, then I doubt there's anything wrong with the board. That sounds like the original device was damaged by ESD, a solder short, etc. Also, does the customer see this issue on one device or many?

    MIKHAIL SALOV said:
    We also checked crystals. Doesn't help.

    How did you check the crystals? Please be more specific.

    Regards,

    James

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