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MSP430FR2512: Low Power Consumption of CapTIvate

Part Number: MSP430FR2512
Other Parts Discussed in Thread: EVM430-CAPMINI

Dear MSP Team,

My customer is developing the touch button using the TI CapTIvate solution.

This is based on EVM430-CAPMINI, only the GPIO configuration has some differences.

It has two buttons and LEDs and the power is supplied by battery. 

The configuration of the CapTIvate is set as default in the design center.

I know that the overall system average power consumption of the EVM430-CAPMINI is only 4 uA.

However, when the MSP430 is in sleep mode, the current consumption is about 280uA.

This value is only the current consumption of the MCU.

He removed the peripheral circuits for only MCU consumption.

In order to reduce the current consumption, please tell me what I need to check.

  • Hi SY,

    I would first recommend that he run a low power mode code example from resource explorer to ensure there isn't anything in the software that might be keeping the microcontroller from going to sleep. Next, I would check to see if there is anything in hardware which might be drawing current.  If you have the CAPMINI, I would recommend taking a power measurement on it also(when in sleep) - to ensure there isn't an issue with how the power measurement is being taken.

    BR,
    Leo

  • Hi, Leonardo,

    I did the test as your recommended and the measured current is about 17uA in LPM3 mode.

    I found the cause of this result. 

    In LPM3 mode, the current consumption of the REFO is high, so the total current is high.

    When the force LPM4 WOP mode is enabled, current is about 4uA.

    My customer's board is designed without external crystals.

    Thank you. 

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