topic Question, i.MX28 clock input in i.MX Processors

Question, i.MX28 clock input

Aemj — Fri, 20 Nov 2015 03:38:32 GMT

Hi team,

I would like to ask about i.MX28 clock input.

My customer has started the HW design for their own i.MX28 board and they will use crystal for i.MX28 clock input.

Do you have any specification for clock input?

Duty cycles, deflection voltage range, etc.

The customer is trying to use a crystal which has about 560mV of deflection range.

Is it OK for i.MX28?

Thanks,

Miyamoto

Re: Question, i.MX28 clock input

art — Tue, 24 Nov 2015 09:27:40 GMT

The i.MX28 processor has the internal oscillation circuits for both 32kHz and 24MHz clock sources. Both oscillation circuits are supplied from the internal linear voltage regulator that produces the VDDXTAL voltage whose typical value is 1.1V. The typical external crystal parameters are as per the specifications attached. The typical duty cycle is 50%.

Have a great day,
Artur

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