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MSP430F5438A: High current draw on Rev D and Rev F control boards

Part Number: MSP430F5438A

Hello Experts,

We are using MSP430F5438A control boards for one of our projects with multiple Revisions, D, F and H.

With Rev H control boards we have sees 50uA current draw and 500uA on Rev D and F. We have gone through errata sheet of MSP430F5438A and identified that UCS 6 listed in the sheet causing high current draw on Rev D.

We have updated the workaround in the code, as per the suggestion in UCS 6 and see current draw reduced to 50-60uA on Rev D and 200uA on Rev F.

Still we are seeing four time more current (200 uA) draw on Rev F control boards than expected(50uA).

I have gone through the bug list mentioned in the errata sheet but unable to find the reason for high current draw on Rev F control boards.

Could you please let me know, is there any reason for high current draw on Rev F control boards.

Thanks,

Gopi 

  • Gopi,

    This is interesting issue and I'm not sure exactly.  Looking at the errata sheet, it does seem Rev F and Rev H have basically the same erratas.  Searching through the document, I did notice PORT 16 errata could maybe apply.  What package are you using?  Seen any issues with the GPIOs are reset?  

    How basic is the code you're using to measure the board power?  Using any specific peripherals?  

    I'll keep looking and see if I can find other things for us to investigate.  

    Thanks

    JD

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