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MSP430F149: MCU flash data losed

Colin Chen
Expert 1105 points

Part Number: MSP430F149

Dear Experts

The customer's product experienced a malfunction at the end customer, and during troubleshooting, an offline burning tool was used to read the MCU FLASH. It was found that the data in the FLASH had changed to 0xFF. The comparison with the FLASH read by the normal board is shown in the following figure. Currently, the specific cause of the malfunction is unclear, and we hope that you can assist in troubleshooting. Thank you

72eda42d-f10c-4391-8c43-67347441578b.png

  • 0
    TI__Mastermind 30505 points

    Hello Collin,

    The only way for the memory to be all 0xFF is it was either never programed or it was erased.   

    Are you sure the programmer you used to try and read the memeory, didn't first erase the device?  Can you test the same process with a working correlation unit? 

    Thansk,

    JD 

  • 0 in reply to JD Crutchfield
    Expert 1105 points

    Hi JD,

    Thank you for your response.

    At present, we suspect that the FLASH data of the chip may have been erased. The customer's application is a gas meter. If FLASH is erased due to abnormalities, does TI have a way to locate the possible impact on the chip or board? Is there a hardware detection method? Thank you

  • 0 in reply to Colin Chen
    Guru 26115 points

    Erasing of flash can happen either by external action (JTAG, BSL) or by the program it is running. 

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