[time-nuts] E1938 PIC hex files?

Robert Atkinson robert8rpi at yahoo.co.uk
Sat Jun 13 05:29:13 EDT 2009


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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