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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

  • It is certainly frustrating when something like this stalls a review or causes a lot of time to be spent on something trivial.

    Manufacturer involvement would seem to be the only real solution here, as Jan points out.

    Interesting work-around though - running with scope probes attached...image (Does this mean you could kludge on physical caps?)

  • in reply to dougw

    Yes, normally this is a good way to drown out a 32kHz oscillator, lol. The board designer did include not fitted load caps, so I can make the on board 32kHz XO function, just not what I was expecting from a Maxim EVK...

     

    At this point I'm still not sure who made the mistake.

     

    There are also a number of silly unit typos in the datasheet (which does happens, just annoying to see):

     

    image

    image

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  • in reply to dougw

    Yes, normally this is a good way to drown out a 32kHz oscillator, lol. The board designer did include not fitted load caps, so I can make the on board 32kHz XO function, just not what I was expecting from a Maxim EVK...

     

    At this point I'm still not sure who made the mistake.

     

    There are also a number of silly unit typos in the datasheet (which does happens, just annoying to see):

     

    image

    image

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