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MSP430F5419A: Power consumption with no code, DVCC applied (via coin battery)

Keith Abell
Intellectual 420 points
Part Number: MSP430F5419A


We have some new prototype boards built and populated with a 3.0V coin-battery in place (soldered in so it can easily be removed) and we are wondering what is the current drain if the 5419A processors are not programmed with any code.  I have spent a few hours pouring over the User Guide for the 5419A and I have not been able to come up with a cogent prediction as to what it will pull in the way of current.

Please help.

Regards,

Keith Abell

Senior Embedded Firmware Developer

  • 0
    Guru 318740 points

    Section 1.2.1 of the User's Guide says:

    A device that is unprogrammed or blank is defined as having its reset vector value, residing at memory address FFFEh, equal to FFFFh. Upon system reset of a blank device, the device enters operating mode LPM4 automatically.

    Please note that all pins will still be configured as inputs, so those that are floating might cause cross currents.

  • 0 in reply to Clemens Ladisch
    Intellectual 420 points
    Thanks Clemens -- I missed the proverbial fine print as it relates to an unprogrammed device. It confirms our belief that TI with an uProc intended for low power would not come up in this state sucking a battery dry!

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