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MSP430F67791A: Using INFO MEMORY for storage of energy values to accumulate even if power is down

Aksha Jadhav
Prodigy 15 points
Part Number: MSP430F67791A

Currently, whenever the device powers off, the active and apparent energy values are resetting to zero values.

Instead, can INFO MEMORY be used for storing the energy values periodically in normal operation and read those values after supply power is restored to device.

What will be advantage/disadvantage over using an external EEPROM over this ?

  • 0
    TI__Guru 71216 points

    Hello Aksha,

    I believe there is an code example in the TI Resource Explorer that demonstrates writing to the INFO area of the device's memory.

    Here is the link.

    The one advantage is you don't need an external EEPROM or communications interface (I2C, SPI) to transfer data.  Having the ability to store the data on the MSP430 is more efficient.  Also not there are (4) 128 byte INFO blocks for a total of 512 bytes.  If you need more memory you can create a custom segment in main FLASH memory and use it same way.  I will mention it that if you perform memory erases, such as during firmware updates, it is a little more challenging if this data is in main memory vs INFO.  INFO areas can be erased separately, or not all when main memory is updated.  Just a thought.

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