[Premium-Rx] Racal RA6778 firmware listing needed, and eprom longevity...

[John Miles]

Another possibility -- sometimes one device (like an EPROM reader/burner)
can read a PROM that doesn't work in its original device.  Try cloning the
bad EPROM before giving up entirely.

-- john KE5FX

> -----Original Message-----
> From: premium-rx-bounces at ml.skirrow.org
> [mailto:premium-rx-bounces at ml.skirrow.org]On Behalf Of Peter Gottlieb
> Sent: Tuesday, May 10, 2005 8:12 AM
> Cc: premium
> Subject: Re: [Premium-Rx] Racal RA6778 firmware listing needed,and eprom
> longevity...
>
>
> I have not seen EPROMS get erased unintentionally, with two exceptions:
>
> Those left on a desk in the sunlight without foil cover labels.
>
> Those shipped overseas and subjected to neutron scanning (there
> were OTP devices
> in epoxy packages!  We then tried to x-ray other OTP devices but
> it took quite
> an exposure to completely clear them so apparently the neutron explosive
> detection units are much more effective).
>
> I suppose it is plausible that all the charge leaked out from
> yours but I would
> think if it was a long term effect you would still see some data in there.
>
> It is easy enough to read out and save ERPOM data though, so long
> as the devices
> are socketed and you take proper ESD precautions.
>
>