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Start a SimulationCRD-30DD12N-K reference design : control board : frequency of crystal oscillator
Hello,
With respect to the reference design of CRD-30DD12N-K, I have a question on the control board.
It seems that the part number Y3 is a crystal oscillator for the DSP.
I wonder what the output frequency of Y3 is.
Thank you for your consideration.
With regards,
GKIM
Comments
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Hello,
It seems that the output frequency of the crystal oscillator Y3 is 10MHz or 20MHz with reference to its firmware: the function of InitSysCtrl().
Meanwhile the internal oscillator is employed in calling the function InitSysPll() in InitSysCtrl().
I wonder why the nternal oscillator is employed as the PLL source instead of the external crystal oscillator.
Thank you for your consideration.
With regards,
GKIM
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Hi GKIM,
Yes, the internal oscillator is selected and configured in this design. Both internal and external oscillator are available. As you see, Y3 is a external crystal oscillator with10MHz, which is available if you want to change to external oscillator. Thanks!
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