Tool/software:
Hello Eddie,
do you have new informations to our topic below?
the case ist closed so i cannot make a comment to this:
Tobias,
I have received the board and initial room temperature testing looks okay. I tried placing the board on my warm laptop to raise the temp a few degrees, but I haven't seen any issues yet. I will take it into the lab this afternoon and test it in a temperature chamber and report back with results.
Update: I am able to see the issue when I bring the board to around 45C. It seems like the issue is stemming from the connected MSP430 or the oscillator used for the MSP430. If I monitor the SCL pin , I see a clean 350kHz clock signal. When the jumpy behaviour is seen, I see this signal go to a much lower frequency and the pulses are not generated properly created erroneous I2C communication. As this is a signal generated by the MSP430, it seems that the issue is on that side and not the LDC. I need to dig further to understand which oscillator may be failing on the board, but at the moment, I am not able to capture a good crystal signal directly from the oscilloscope. I will continue looking into this and let you know what I can capture.
Hello John,
thanks for the answer.
Eddie has tested this demo board and had the same issues.
He would clear this issues but we dont get an following answer.
When he is back in office?
Here i have a link to the old, closed case with his comments:
LDC1314DIAL-EVM: No Feedback - Sensors forum - Sensors - TI E2E support forums
Thanks and best regards
Tobias
Tobias,
Eddie will be unavailable for a bit.
I can try to help figure this out, or we can wait for Eddie to retune around the end of this month.
It's your call.
Regards,
John
Hello John,
please try to help in this case.
at the moment we programming an 360° application with this LDC an want that it is working well.
Thanks.
Tobias
Tobias,
I found Eddie's dial EVM and will work on reproducing what has been seen so far.
Once we have that, we will work towards some kind of solution.
I will update this thread by Thursday COB.
Regards,
John
Tobias,
Apologies, but I will not be able to close this out today as I thought.
I will try to update this thread by COB on Wednesday of next week.
It sounds like this may be an issue with the MSP430 and/or its oscillator circuitry.
In the interim, would you please take a look at the associated forums and/or blogs to see if this issue has been encountered before?
Regards,
John