LCDC_EN Usage of iMX25

[torus1000]

Hi chip experts,

I think there are 3 clock domains(AHB,PER&IPG) in the LCD Controller (LCDC) and all of regs are in the AHB domain.

I want to make sure the proper usage of LCDC_EN which is IPG Clock Gating[29].

(Q) Is it OK to leave LCDC_EN clear (=no ipg clock) when write regs?

Because I don't want to make any noise during startup. Can anyone help me?

Thanks.

[Yuri]

Hello,

  All clocks (AHB,PER&IPG) are necessary for LCDC operation.

Have a great day,
Yuri

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[torus1000]

Dear Yuri,

Thank you for replying. I just want to clarify your words "LCDC operation".

Is it mean the activated period of LCD signals or registers?

If so, I agree with you that all 3 clocks are necessary. How about "no LCDC operation" preriod;

Is it OK to gate IPG clock(clear LCDC_EN) in order to suppress LCD signals after initialization done?

BR