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MSP432P401R: Power consumption compare between Active Mode and Low Frequency Active Mode

erik lee2
Genius 3060 points

Part Number: MSP432P401R

hi

refer to the datasheet of MSP432, the power consumption at active mode is 80uA/MHz, but the LOW FREQUENCY ACTIVE Mode's power consumption is 83uA @128KHz,

how come the power consumption of low frequency active mode higher than Active mode?

  • 0
    TI__Guru 63031 points
    Hello Erik,
    Please refer to 5.11 and 5.12 in the datasheet. Table 5.12 uses 128Khz and so it is fairly straight forward to see where the 83uA comes from. In table 5.11, I do not know exactly which frequency was used to determine 80uA. If you look at 1Mhz operation (3.0V, and Flash) you can see that the current consumption is on the order of 400uA. If you go to 24Mhz (Vore0, Flash, 3.0V) then the uA/Mhz goes to 2060/24 -> 85uA/Mhz.

    Also note that this is with the DCDC implementation which is more efficient at the higher frequencies.

    Regards,
    Chris

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