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MSP430F5438A: MSP430F5438A code lost problem

Hardy Ma
Intellectual 470 points
Part Number: MSP430F5438A
Other Parts Discussed in Thread: MSP-GANG,

Dear TI，

The customer's product use MSP430F5438A, mcu work is abnormal in the process of use. Use MSP-GANG to read the code, the read code is all empty, the code is lost.

There are the following questions to be confirmed：

1. PMM is not configured, does it cause the code to be erased?

2. Flash operating frequency range?

3. Other possible reasons for lost of code?

Many thanks.

  • 0
    TI__Intellectual 1330 points
    Hi Hardy Ma,
    I think we need some more information why you came to the conclusion that your Flash is empty.

    - What have you done before that this happens?
    - Does this occur just once? Can you repeat it also on more than one device?
    - What does empty mean? What do you read and at which location?
    - Which frequency are you using for MCLK?
    - What supply voltage are you using? Is your application still working? Maybe you just can't read the code...

    An unconfigured PMM shouldn't cause this issue.

    Best regards,
    Tobias
  • 0 in reply to Tobias Oschmann
    TI__Guru 56685 points
    Hardy,

    Do you have the additional information that Tobias outlined? It could be that your JTAG is locked which is why you can't read anything out. If no response soon, then I will close this thread.

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