i.MX8M XTALI/O internal impedance

[m_c]

In the i.MX8M reference design, the resistance (R411 and R412) of XTALI/O 25M and 27M are DNP. Is that mean there has an internal impdeance in between?

[Yuri · Accepted solution]

Hello,

Yes, i.MX8M has internal biased amplifier. But since value of the internal bias resistor is not 

guaranteed exactly, the reference design provides external option.

Have a great day,

Yuri

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