About the spec. of a crystal oscillator required for iMX6

[yuuki]

Dear all,

Would you teach the spec. of the crystal oscillator(32KHz and 24MHz) which i.MX6 needs?

For 24MHz xtal,
I referred to the following URL.
https://community.freescale.com/message/337037#337037

Here, it argues about CL, ESR, etc.

However, It does not argue about the following spec.
- Tolerance
- Temperature Stability
- Operating Temperature

Would you teach about such spec.?

For 32KHz xtal,
I was not able to find the spec. about a 32-kHz crystal oscillator.
Would you teach about the above-mentioned spec.?

May I have advice?

Best Regards,

[igorpadykov]

Hi yuuki

summary (Tolerance +  - Temperature Stability) are defined

in sect.2.7 "Oscillator tolerance"

IMX6DQ6SDLHDG  IMX6DQ6SDLHDG, Hardware Development Guide

For 32KHz there are no such strict requirements, one can follow

for example Table 9 "Recommended External Crystal Specifications"

IMX25AEC i.MX25 Datasheet

Operating Temperature is defined by final product specifications.

Best regards

chip

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[yuuki]

Dear Chipexpert-san,

Thank you for your support.

For 24MHz,
I referred to IMX6DQ6SDLHDG.
However, I was not able to find the description about the crystal oscillator connected to XTALI and XTALO of iMX6.
Can Tolerance=+-500ppm be used for XTALI and XTALO of iMX6?

Or, Is it necessary to fill the spec. indicated to Table9 of IMX25AEC?

Best Regards,

[igorpadykov · Accepted solution]

Hi yuuki

had you looked at IMX6DQ6SDLHDG

Table 2-20. 24 MHz crystal tolerance guidelines  ?

It is named as "24 MHz crystal" - so these tolerances are

for "crystal oscillator connected to XTALI and XTALO".

So if you are using Ethernet - then for it 50ppm  - 24 MHz oscillator tolerance.

Best regards

chip