[time-nuts] E1938 PIC hex files?

[Robert Atkinson]

Pics have pretty good copy protection. I'd be surprised if Agilent haven't protected the pic in the E1938. Many pics (AFIK thisincludes the 'C74) scramble the data on reading a copy protected chip. This allows the verification of a chip without revealing the code. A known good chip is a starting point. fortuntly HP socketed the PLCC pic. Know you need a time nut with a good E1938, a PicStart Plus ( or similar programmer) and a PLCC adaptor. I have the latter two but no E1938.

Robert G8RPI.

--- On Sat, 13/6/09, Richard H McCorkle <mccorkle at ptialaska.net> wrote:

> From: Richard H McCorkle <mccorkle at ptialaska.net>
> Subject: Re: [time-nuts] E1938 PIC hex files?
> To: danrae at verizon.net, "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
> Date: Saturday, 13 June, 2009, 7:16 AM
> Hi Dan,
> 
> If the 1938 was purchased through Fluke1 he is usually very
> good
> about replacing bad items he sells to Time-Nuts. You might
> want
> to contact him about a replacement unit or perhaps getting
> a
> pre-programmed PIC from a different unit to try.
> 
> Richard
> 
> 
> > I am beginning to think that the PIC in my Chinese
> Ebay 1938 is dead or
> > at least injured.  Does anyone have the hex files
> for this one?  Blank
> > PIC16C74As can be had and it may be worth my trying to
> program a new
> > one.  Nothing else seems to make it work and as
> the PIC seems to be
> > asleep, I'm not sure that attempting to talk to it
> with the serial
> > program is going to help me much, but I will try.
> >
> > The part number is: E1938-80002
> >
> >
> > Dan
> >
> > ac6ao
> >
> >
> >
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> 
> 
> 
> 
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