[time-nuts] FE5680A Corrupted EEPROM

Tom Wimmenhove tom.wimmenhove at gmail.com
Mon Oct 20 23:28:09 EDT 2014


It may either be flash or EEPROM, but it's all in the same chip. Skip told
me he has fixed a couple of FE5650 units that had the same issues by
reprogramming them without issues, so I think it is well worth a try on the
5680A.

Regards,
 Tom

On Mon, Oct 20, 2014 at 9:46 PM, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> Unless we are talking about flash rather than EEPROM, an image may not do
> you much good.
>
> Firmware normally gets stored in flash. That code is at least similar from
> unit to unit.
>
> Calibration data normally gets stored in EEPROM. On a modern Rb there are
> a lot of things that are “tweaked” by EEPROM settings rather than fiddling
> pots and jumpers. Each EEPROM is unique to a unit. The settings in one may
> not be very healthy for another one.
>
> Again, ignore all this if the objective is a flash re-load.
>
> Bob
>
>
> > On Oct 20, 2014, at 6:08 PM, Tom Wimmenhove <tom.wimmenhove at gmail.com>
> wrote:
> >
> > Skip Withrow contacted me and explained that apparently the FE5650 has a
> > tendency to get it's internal EEPROM corrupted when sending commands to
> it
> > right after power up. This confirms my suspicion that the EEPROM of my
> > FE5680A unit suffered the same fate.
> > He offered me to reprogram the unit as he has an ST programmer but I
> would
> > need a donor unit. He would also make the files publicly available.
> > Is there anyone out there that would let me or Skip borrow their FE5680A
> > unit for a short amount of time to read it out? This would be greatly
> > appreciated!
> >
> > Regards,
> > Tom
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