Question, i.MX28 24MHz crystal

[SLICE]

Dear team,

My customer is using i.MX28 for their board now, and they want to change 24MHz crystal from the current one.
Could you show me whether there is a specification on i.MX28 about the period from start of oscillation to its stabilization?

Thanks,

Miyamoto

[igorpadykov]

Hi Miyamoto

I am afraid i.MX28 crystal start-up time specs are not available.

One can follow design check list and crystal requirements on

Hardware Design Checklist for i.MX28 

In general time to crystal stabilization is defined by crystal Q factor

(typical Q value for a quartz oscillator ranges from 10**4 to 10**6),

it requires (roughly) Q number periods until crystal become stable.

Crystal oscillator - Wikipedia 

Best regards
igor
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[SLICE]

Hi igorpadykov‌

Thanks for your support.

They believes that i.MX will do switching clock or releasing reset internally after stabling the oscillation.

Can I understand that users do not have to detect the stability of the oscillation externally?

Best Regards,

Miyamoto

[igorpadykov]

Hi Miyamoto

yes this is correct understanding.

Best regards
igor