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How to configure LMK5B33414
Hi team,
Please advise me on my problem.
Using the DPLL1, I try to output 30 MHz clocks on OUT0 and Out1 port,
from a 30 MHz reference clock on REF0 input.
In the meantime, using thew DPLL2, I want to output 30 MHz clocks on OUT4
and OUT5 port, synchronizing to a 15 MHz reference clock.
Following the instruction on the LMK5B33414EVM User's Guide, I set the TICSPRO
as bellow.
DLPP1 VCO was set to 960 MHz(Quarter of 4800 MHz), however, DPLL2 VCO was to
a strange value as 3480.46875 MHz (Expected frequency may be 5760 MHz)
Please advise me to correct DPLL2 VCO frequency.
Mita
Hi Mita,
These should state the correct VCO frequencies when configure properly (4800 MHz for VCO1 and 5760 MHz for VCO2).
I noticed you use the divider with the XO for the rPLL1&2 reference. In this case, you can bypass the divider to keep 48 MHz for PDF or bypass + doubler to increase PDF which provide advantage in output noise floor.
In your DPLL1&2 setting (Step 3), looks like you're using Manual Fallback which seems to cause the issue that TICS Pro couldn't calculate the proper settings for DPLL1&2. Can you try other options?
When you apply these 4 buttons, it would state the error in the log window. Let me know which error shown with these steps.
-Riley
Riley-san,
Thank you for your advise.
I could fixmy problem.
Follwing your advcie, I have put check marks on the "Bypss Dividor" and "DBLR" for the PLL1, PLL2 and PLL3.
I also chenged the input mode from "Manual Fallback" to "Auto Reverive" for the DPLL1 nad DPLL2.
When I clicked the four buttons, I did not see any error message.
Then all outpus were programmed as I intended.
When I chose the input select mode as "Manual Hold over", instead of "Manual Fallback",
Python error was reported.
I attached the modified (good) .tcs file.
Mita
Hi Mita-san,
Good to hear it's working for you.
I have noted the error with "Manual Holdover" or "Manual Fallback" to investigate further.
Since it's working using "Auto Reverse", I will close the thread for now. Feel free to reach out if you have other questions.
-Riley