CLKOUT clock configuration LPC546xx

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CLKOUT clock configuration LPC546xx

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sergeylozhechka
Contributor I

Dear collogues.

I would like to ask you for some help with understanding the following situation.

Setup description:

I am using LPC54607J512 with external oscillator equal to 12MHz. 

My task right now is to route ExtOsc to CLKOUT that I have done but for some reason I am being experienced  with strange behavior of I2C on flexcomm 2.

Clock_Config.png

I2C_12MHz.png

When I commented CLKOUT routing I got correct I2C communication.

 For more details look at the attachment to this post.

P.s. Channel 2 is CLKOUT signal.

 

 Thank you in advance.

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sergeylozhechka
Contributor I

Good morning.

I would like to share with you new finding related to the issue.

Mystery has been discovered and root course of the issue is misfunctioning of logical analyzer and results on the screen.

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Omar_Anguiano
NXP TechSupport
NXP TechSupport

Hello

Hope you are well. Is good to know that you found the cause of the issue.
If you have more questions, please let me know.

Best regards,
Omar

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