[volt-nuts] Fall of SRAM voltage in a 3457A without external power

[Dr. David Kirkby (Kirkby Microwave Ltd)]

On 25 January 2016 at 11:50, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:

> --------
> In message <
> CANX10hCamahHhXqiAo9BDZU03C2bbt787Mr10RMnywK3oa8k5w at mail.gmail.com>
> , "Dr. David Kirkby (Kirkby Microwave Ltd)" writes:
>
> >ESD and leakage of the human body would probably make screw this up, so
> I'm
> >not suggesting replacing the battery that way if you want to preserve the
> >contents of the SRAM, but there's a fairly good chance the contents would
> >remain in RAM if one was reasonably quick, especially if you topped the
> >voltage up from the mains just before removing it from the chassis.
>
> I usually hook up a separate battery while doing such surgery.
>


Yes, it is the logical thing to do, but there's a reasonable chance one
could get away with it, but obviously if its important to keep the data,
one would use an external supply. I'm tempted to purposely let the data
become corrupted for the reasons I gave in another thread.

Dave