About capacitor value for some power supply in i.MX6

[tomo]

Hello, all.

SABRE-SD board has 22uF capacitor for VDD_HIGH_CAP, NVCC_PLL_OUT pin.

But these pin are recommended a 10uF capacitor according to Design Checklist (IMX6DQ6SDLHDG_Rev1.pdf).

And it is written in checklist that operation cannot be guaranteed, if capacitance over 10uF.

Why SABRE-SD board has 22uF, and does SABRE-SD board not occurred problem so far?

Best regards,

Tomo

[tomo]

My customer pointed out to me that 24 MHz crystal has stop once before stable oscillation.
Is this waveform good for the i.MX6?

I changed to 22uF capacitor for NVCC_PLL_OUT pin, then 24 MHz oscillation stop phenomenon is not occured.
Could you tell me if this phenomenon is related to the value of the capacitor?

[igorpadykov · Accepted solution]

Hi Tomo

to guarantee operation in whole temperature range

and production process variations it is necessary to

follow recommendations Design Checklist IMX6DQ6SDLHDG_Rev1.pdf.

Also SABRE-SD board design was developed before all processor

documentation was prepared.

Best regards
igor
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