Looks like I am joining the party, with a TDS3054B and a DS1742W that has lost its mind.
I've extracted the DS1742W, milled away 0.030" of the top plastic to get to the battery.
The top terminal of the battery is GND and connected to package pin 12.
I used a hot soldering iron (to soften the potting compound) and various picking tools to
dig down in the area between pin 13 and the battery perimeter, till I got to the battery
positive terminal.
The positive terminal is also exposed as the shell of the battery. My battery measures
0.673 mV, and at such high impedance that my 10 MOhm/V multimeter causes the voltage
to slowly drop. I soldered a red wire to the exposed positive terminal of the battery, and
cut the negative side of the battery terminal at the point where it gets thin. Unfortunately
I had not connected the new battery yet, and lost the "NV"RAM contents.
Anyway, I added a CR2032, restarted the scope with B-Trig, and after warm up, successfully
ran SPC. This passed, and the clock now keeps time reasonably accurately.
What does not work is ethernet, and I have the same issues as other people. From my
reading, it seems I need to load a valid image into the DS1742W to restore the ethernet
functionality.
1) Is the 3054 image supplied at the end of article 99 of this thread the image I need,
and if not, where do I get it?
2) How do people load the image into a repaired DS1742.
My programmer does not know about the DS1742W, but does know about the DS1220AB
Unfortunately all versions of DS1220xx are 5V parts, so my programmer (Advin P44+)
will set VCC to 5V, and the signal thresholds appropriately. This could destroy my DS1742W.
A) Is there some other suggested device that has the same pinout, but is 3.3V?
B) Or do I get a 3.3 V microprocessor, build an interface to a 24 pin ZIP socket, and write
a reader/writer program, to load the image into the DS1742W
Are the locations for power cycles and operational hours known, and what are the formats.
Currently my scope is reporting that it has been turned on for -2,147,483,648 hours
Thanks for any guidance.
Philip