Question, i.MX6D/Q external 32.768KHz crystal

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Question, i.MX6D/Q external 32.768KHz crystal

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Aemj
Contributor IV

Dear team,

I would like to ask about the necessity of external 32.768KHz crystal oscillator of i.MX6D/Q.

My customer plans to use i.MX6D/Q for their system and they tend to use SD/eMMC boot.

In that case, is the external 32K crystal needed?

The customer has a concern on the impact by ERR07926.

Thanks,

Miyamoto

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Yuri
NXP Employee
NXP Employee

Hello,

  You may look at erratum ERR007926 (ROM: 32 kHz internal oscillator

timing inaccuracy may affect SD/MMC, NAND, and OneNAND boot) workarounds.

Using external stable 32 kHz clock input or crystal oscillator are possible and most

universal (and recommended) solutions.

Regards,

Yuri.

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