Products > Test Equipment
TH2830 vs TH2832
luudee:
So, unfortunately, some bad news.
I tried to read the internal Flash of the LPC1788, but could not.
I even created a special adopter, so I can look at the signals with my scope.
I also was able to confirm that the JTAG interface of the LPC1788 was connected
to the 10 pin connector (you can see the traces on the very top layer, going to pins
2 and 4, which are TDO and TDI ...
At this point, I believe that the security fuses have been engaged, and we will
not be able to access the internal FLASH.
If anybody has any ideas/suggestions, I would like to hear them ...
Cheers,
luudee
KungFuJosh:
More bad news...
The sourcetronic firmwares both have measurement issues. Most measurements are good, but 100KΩ across the board from 100Hz to 200kHz, and 10KΩ at 1kHz are both bad. Off by as much as 50%. I tried ST2832, then ST2830, then TH2830. The only one that accurately measured those was the TH2830 firmware.
@Martin72, can you please test your ST2830 with 100K and 10K resistors at those frequencies and see if it works fine for you? Can you also post your firmware "copyright" date from startup?
I'll post my measurements after I enter them in Excel.
Thanks,
Josh
KungFuJosh:
Here's the test results on the spreadsheet I setup.
Notes:
The ST42 test frequencies weren't stable, they never settled, so I left the range as the result.
The ST42 signal level is 1Vpp, so it reads 0.3586Vrms.
The failures are pretty consistent in the Sourcetronic firmwares, so I only noted the ST2832 results. The TH2830 results are there for comparison.
I'm not going to bother with L or C measurements for now.
Thanks,
Josh
Martin72:
Hi Josh,
Could make the measures on monday at work, the last day before my holidays.
Here a snip from the last calibration (May 2023), unfortunately only at 100Hz/1kHz, so I´ll take my new reference board to work and measure with 10khz and 100khz.
KungFuJosh:
--- Quote from: Martin72 on July 08, 2023, 12:47:48 am ---Hi Josh,
Could make the measures on monday at work, the last day before my holidays.
Here a snip from the last calibration (May 2023), unfortunately only at 100Hz/1kHz, so I´ll take my new reference board to work and measure with 10khz and 100khz.
--- End quote ---
Awesome, thank you. It would also be very helpful if you can get the firmware date when it starts up; whatever the copyright says. I have a hunch they might have supplied outdated firmware files. I don't know if it was on purpose or not. I hope not.
Thanks,
Josh
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