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What to do when a review doesn't go as planned

scottiebabe

I am currently having an issue reviewing the MAX77714 EVK where the 32k XO isn't running. Its not really a hardware issue as I can get the XO to run just with the capacitance of 2 10x scope probes. The issue has to do with configuring the PMIC to enable its on die load capacitors for the 32k oscillator.

 

I can't even try to enable the load capacitors because the evaluation software doesn't have the correct register map for the PMIC. The evaluation tool locates the 32KLOAD bitfield in register 0x31:

image

 

When actually the bitfield is in register 0x30 (from the datasheet: https://datasheets.maximintegrated.com/en/ds/MAX77714.pdf ):

image

 

Actually as I write this, even if the 32KLoad register was addressed correctly in the evaluation software it is readonly so I still wouldn't be able to change it. So why isn't it booting with a value of 0b00 instead of 0b10? Wrong OTP config?

 

So, my questions is what do reviewers typically do in this situation?I don't want to write a scathing review over something so silly.

 

I suppose I will start by seeing if maxim will confirm the issue with the EVK and see if they can provide a software fix or want to send new hardware.

 

One of the uncertainties I had with my last review was determining if I am reviewing the silicon product or the evaluation platform. In this case, am I reviewing the MAX77714 or the EVK and software for the MAX77714? Or, a bit a both? Or, is it up to the reviewer?

 

Thanks

Parents

  •   wrote:

    One of the uncertainties I had with my last review was determining if I am reviewing the silicon product or the evaluation platform. In this case, am I reviewing the MAX77714 or the EVK and software for the MAX77714? Or, a bit a both? Or, is it up to the reviewer?

    About this, I think it's expected to be a full-stack review covering the whole device platform(the chip, evaluation hardware, software). Getting all the features into test and review might not be very practical for all the RoadTests, given specified time, but exploring one or two unique ones (probably the one's which other manufacturers don't provide) and probably covering a project realated to that feature putting device to edge cases. Afterall, nothing is bounded. Reviewer is free to plan the flow of RoadTest.

  • in reply to navadeepganeshu

    I'm glad I have taken the time to collect my thoughts on this issue. I will also define what I expected to be a reasonable response and level of support from Maxim. If they are able to:

    • Provide a software fix for setting the 32KLoad register
    • Acknowledge and update the datasheet to reflect what the 32Kload register is with OTP=1 silicon

     

    Then I believe they would have done everything they should do given the issue at hand. If it does turn out to be the datasheet isn't correctly documented, I can see how the EVK board designer made the "mistake".

     

    So far I haven't seen any issues with the MAX77714 silicon per se. Its been with the EVK, documentation, and software. I suppose the review is a bit of everything.

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  • in reply to navadeepganeshu

    I'm glad I have taken the time to collect my thoughts on this issue. I will also define what I expected to be a reasonable response and level of support from Maxim. If they are able to:

    • Provide a software fix for setting the 32KLoad register
    • Acknowledge and update the datasheet to reflect what the 32Kload register is with OTP=1 silicon

     

    Then I believe they would have done everything they should do given the issue at hand. If it does turn out to be the datasheet isn't correctly documented, I can see how the EVK board designer made the "mistake".

     

    So far I haven't seen any issues with the MAX77714 silicon per se. Its been with the EVK, documentation, and software. I suppose the review is a bit of everything.

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