Products > Test Equipment
TDS3012B ethernet configure failure
giosif:
I suspect the battery in the Dallas NVRAM has run flat.
And there is no simple way of checking this is actually the case: you need to desolder the NVRAM IC and try to read it with an EEPROM programmer/reader.
darkstar49:
--- Quote from: giosif on September 19, 2020, 01:51:02 pm ---I suspect the battery in the Dallas NVRAM has run flat.
And there is no simple way of checking this is actually the case: you need to desolder the NVRAM IC and try to read it with an EEPROM programmer/reader.
--- End quote ---
Don’t think it’s completely flat, because the clock is still running when it’s powered off... there’s some shift, but it still keeps up, more or less...
Will check the datasheet to see if I can read something with a dev board (don’t have any eeprom programmer at hand )
giosif:
Yes, better double check the clock is actually still running, particularly when powered off.
I believe, in my case, the clock would keep time even when powered off, but not advance - e.g. the time would be 19 Sept 2020 15:00 when turning the scope off and, when turning it back on hours later, it would show the same 19 Sept 2020 15:00 or thereabout.
If you need your NVRAM checked, depending on when you are located, you could ship it to me and I could do that for you.
And, if the battery is indeed flat, I could even try to dig it up from the epoxy, solder in a CR2032 battery holder w/ battery and program the NVRAM.
PM me if you are interested.
Raymonddf:
--- Quote from: Galen on June 24, 2020, 09:28:33 pm ---Based on Yetanothertechie's experience sharing, progress was made. I downloaded the 3014B NVRAM image from this blog, and burnt in my 3014B by TL866, the Ethernet connection works well, using fixed IP. I didn't try DHCP mode.
To confirm this, I copyed the NVRAM image from my 3012B, which works for Ethernet, and burn it into the Ethernet problem 3012B, it's Ethernet function recovered.
So the Mac address maybe the cause of the problem.
So I try to only change the Mac address in my old NVRAM file, and burn in my 3012B, Ethernet fail again.
Need to do more study on this. there maybe a verification process in the NVRAM image. Maybe the Checksum?
BTW, the Mac address is stored at x06F0 - x06F5.
Thank you very much Yetanothertechie.
--- End quote ---
Hi Galen and others,
Thanks to this thread :) I found out what caused loss of Ethernet connection after replacing the battery in my TDS3014B. When I bought the 'scope a few days ago, both RTC and Ethernet connection were flaky. The RTC is fine now.
You said (above) that you used your TL866II to copy the contents of the 3014B file (from elsewhere) into your DS1742W. I have the file but AFAIK, the TL866II does not support the DS1742W directly. Do you remember what target device you specified? Does the DS1742 allow Vcc of 5 V or above? The datasheet suggests it does but I'd rather not kill my DS1742W.
Galen:
--- Quote from: Raymonddf on September 20, 2020, 02:15:19 pm ---Hi Galen and others,
Thanks to this thread :) I found out what caused loss of Ethernet connection after replacing the battery in my TDS3014B. When I bought the 'scope a few days ago, both RTC and Ethernet connection were flaky. The RTC is fine now.
You said (above) that you used your TL866II to copy the contents of the 3014B file (from elsewhere) into your DS1742W. I have the file but AFAIK, the TL866II does not support the DS1742W directly. Do you remember what target device you specified? Does the DS1742 allow Vcc of 5 V or above? The datasheet suggests it does but I'd rather not kill my DS1742W.
--- End quote ---
Pls select DS1220
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