[aprssig] APRS and Garmin Nuvi

Scott Miller scott at opentrac.org
Fri Feb 1 09:45:55 CST 2008

Looks like a standard mini-B to me.  That's not to say they couldn't 
overload the pin functions - you can already signal things like bus 
resets with single-ended conditions on the differential lines.  Could be 
as simple as a pull-down on the + line that switches D- and D+ to RS-232 

The blob on the cable isn't large enough for anything bigger than an 
LQFP32 at most.  I really don't expect to find anything that complicated 
in there.


Greg D. wrote:
> Wow, I wonder if this would work on the other Garmin USB-based GPS's?  I see it's not listed for their service, but I have a eTrek Vista HCx in the mail, due for delivery tomorrow.  I figured I would have to keep using my GPS-III (with the display going out), or pick up a simple serial GPS module and put it in a plastic box, for attachment to my Kenwood D7.  Instead, maybe this?
> Does the cable have a standard mini-USB end on it (the small kind), or is it something special?  If standard, then they must be emulating a USB host in there, because there aren't any extra pins on the connector to do anything other than USB.
> Greg  KO6TH

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