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CCGR in i.MX7D

Question asked by ko-hey on Jun 12, 2017
Latest reply on Jun 22, 2017 by Artur Petukhov

Hi all

 

I have questions about CCGR in i.MX7D.

 

Q1.
Please tell me the timing of the settings change.

My understanding is as below.
・The setting is immediately reflected in the Shadow Register and is pending until the clock of the peripheral can be changed.
・When settings can be changed, settings are automatically reflected.

How can user know the "PLL is ready" ?


Q2.
When not using the peripheral, CCGR is set to OFF (Domain clocks not needed), and it is implemented by ON (domain clocks required all the time) only when using it.

 

Is there any problem in designing switching CCGR dynamically on / off?

 

I am concerned about the design that NXP does not recommend the dynamic change for the i.MX7D design.

 

 

Ko-hey

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