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MSP430F2272: Memory Loss

Garret Holt
Intellectual 1050 points
Part Number: MSP430F2272

Hi Team,


I am working with a customer who has a design with MSP430F2272 and is experiencing a loss of flash memory. Whenever this occurs it is in a 512 byte segment. The failure usually erases the first or second segment of the program memory starting at address 0x8000.We came across this post which cites a noisy power supply and frequency outside of operating region as possible issues. The supply does not look noisy and run the part at 8Mhz after 5 seconds from startup and the voltage is at 3.3 volts. Are there any other potential causes of flash memory loss whether it is system level or software? Is there any possibility that ESD could cause this? I would expect this to damage a GPIO rather than memory though.Some of the devices are 7 years old but this recently occurred on a new device.

Thank you,


Garret

  • 0
    TI__Mastermind 38580 points

    Hi Garret,

    I also would not immediately suspect ESD would clear a memory segment. How many devices is this occurring on?  Can you share the schematic?  What kind of environment is this operating in?  

  • 0 in reply to Eddie LaCost
    TI__Intellectual 1050 points

    Hi Eddie,

    There is a driver in their system that when turned off causes the  supply to droop slightly until it reaches the reset voltage. The driver may turn back on after a variable amount of time and observe the failure occurring when it turns on very close to the reset voltage. Could the program counter get off and cause another part of the program to run?  Once a segment of program memory has been erased under these undesirable conditions, could that segment be prone to lose its memory again because it was damaged? 


    Thanks for your help,


    Garret

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