Slicing open the top of a 48T02 Sun Sparc chip to replace battery is that thing hollow or filled with epoxy?

From: Don Maslin <donm_at_cts.com>
Date: Sat May 19 16:48:49 2001

On Fri, 18 May 2001, Richard Erlacher wrote:

> Maybe the SmartSocket isn't what I wanted. Somewhere in the "pit" I've got a
> Dallas socket that has a 3-volt battery in the bottom. It's potted in place but
> provides 3 volts on pin 24, (maybe pin 28, but the upper left corner, anyway) in
> this case and does nothing but provide power to keep the content of the resident
> IC intact, and, maybe, gate the write signal off until the power is stabile. I
> do believe there's no continuity between the write pin on the resident IC and
> the corresponding socket pin, so something's going on. That sort of device
> might work, don't you think? Next time I'm at the Dallas web site I'll try to
> find the socket and let you know what the appropriate nomeclature is.
>
> Dick

There is/was a Dallas SmartClock(?) that contained a battery for the
internal clock/calendar and also carried a 28-pin socket atop the
package. I don't believe that battery voltage was provided to the
socket though. Ampro used them in their LittleBoard/PC.

                                                 - don

> ----- Original Message -----
> From: "Pete Turnbull" <pete_at_dunnington.u-net.com>
> To: <classiccmp_at_classiccmp.org>
> Sent: Friday, May 18, 2001 1:43 AM
> Subject: Re: Slicing open the top of a 48T02 Sun Sparc chip to replace battery
> is that thing hollow or filled with epoxy?
>
>
> > On May 17, 19:34, Richard Erlacher wrote:
> >
> > > Has anybody tried one of the DALLAS "smart socket" products with this
> > thingie?
> >
> > Unfortunately the 48T02 is a TOD clock and calendar as well as NVRAM, so
> > there's no suitable SmartSocket to replace it. The registers have to be at
> > particular places and use a particular protocol too.
> >
> >
> >
> > --
> > Pete Peter Turnbull
> > Network Manager
> > University of York
> >
> >
>
>
Received on Sat May 19 2001 - 16:48:49 BST

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