[time-nuts] TruePosition GPS Receiver firmware

Bryan _ bpl521 at outlook.com
Mon May 8 21:46:09 EDT 2017

Hi Mark:

My TL866A programmer will read it, or it says it will. Unfortunately I don't have the TS0P48 adapter. You are welcome to borrow it, perhaps a adapter can be made up. They are commonly available on Ebay.




From: time-nuts <time-nuts-bounces at febo.com> on behalf of Mark Sims <holrum at hotmail.com>
Sent: May 8, 2017 2:45 PM
To: time-nuts at febo.com
Subject: [time-nuts] TruePosition GPS Receiver firmware

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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