[time-nuts] TruePosition GPS Receiver firmware

Mark Sims holrum at hotmail.com
Mon May 8 17:45:46 EDT 2017

I cleaned up the chip without removing any of the markings.  It looks like it is a Spansion S29JL032H90TFI21.  Hopefully somebody has a reader that can handle it.

Looking at the documentation for the LMU unit that these came out of didn't reveal anything new.  There is no mention of an antenna elevation mask or signal level mask setting...  it's hard to imagine as GPSDO with those (particularly the elevation mask).

Anyway, Heather is now doing a pretty good job of working with it.  It would be nice to be able to squeeze some more features out of them...

Oh,  and the seller jacked up the price by $10.   I think you can get the complete LMU (shipped) for close to that from one of the sellers.


> The two digits before the ? are very important. They describe the memory 
format. You may want to put it under your microscope.

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