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RM48L952: Flash memory corruption

Hugo Cruz
Prodigy 190 points
Part Number: RM48L952

Hello e2e,

I read that some microcontrollers with internal flash memories have a possibility of permanent damage during write/read operations if the input power is not properly ensured.

There is any possibility of such event in RM8L952?

I try to figure it out in data sheet or user manual but I did not found any information. Since this microcontroller is for safety applications I expect no problems regarding  permanent damages on the flash memory but can anyone confirm it?


Best regards,
Hugo

  • 0
    TI__Guru**** 196776 points
    Hello Hugo,

    The datasheet lists the recommended operation condition and the absolute maximum rating for VCC/VCCIO/VCCP and temperature. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

    The endurance and data retention parameters are listed in table 6-23 (program flash) and Table 6-24 (data flash).
  • 0 in reply to QJ Wang
    Prodigy 190 points
    Hello QJ Wang,

    I found that information regarding the maximum absolute ratings but my questions is not that.

    If the power is cutoff during a write/read operation in the flash there is any possibility of permanent damage of the flash cells that holds the information? The damage here can be the cell cannot preserve the bit information.
  • 0 in reply to Hugo Cruz
    Prodigy 190 points

    Hugo Cruz said:
    Hello QJ Wang,

    I found that information regarding the maximum absolute ratings but my questions is not that.

    If the power is cutoff during a write/read operation in the flash there is any possibility of permanent damage of the flash cells that holds the information? The damage here can be the cell cannot preserve the bit information.

    Such permanent damage could invalidate an entire flash bank or sector. In this situation I should disable by software that bank/sector.  

  • 0 in reply to Hugo Cruz
    TI__Guru**** 196776 points
    Hello Hugo,

    If the power is removed during the flash operation (for example write), the data may not be lost, but the flash itself should not be damaged.
  • 0 in reply to QJ Wang
    Prodigy 190 points
    Thank you QJ Wang, your confirmation will be helpful for my project.
  • 0 in reply to Hugo Cruz
    TI__Guru**** 196776 points

    Sorry for my typo.

    If the power is removed during the flash operation (for example write), the data may be lost, but the flash itself should not be damaged.

  • 0 in reply to QJ Wang
    Prodigy 190 points
    I was aware of your typo ;).