Hi,
Please can you let me know if the 2.2M resistor recommended for 24MHz oscillator is always needed for i.MX6 dual / quad? The reason for asking is that many automotive customers do not allow resistor values > 100K without additional testing. Removing this resistor reduces the test cost for automotive customers significantly.
In ERR005777, it mentions that projected impact is a 1.5ms increase in start-up time. We can tolerate this increase in order to remove the resistor. Please can you confirm if this is the only effect, and also whether this errata is fixed for i.MX6 dual / quad plus? Many thanks!
Sorry to dig this up but I have exactly the same question. There was never any reply to the above.
Adding 1.5ms to startup isn't a problem for our design. But I am wondering if there are any other undocumented side effects to omitting this resistor.
Mark
Hello,
The Hardware Guide recommends to bias XTALI with a 2.2 MOhm resistor to GND
in order to ensure reasonable start-up time. But some customers found that not using
the 2.2 MOhm resistor caused some of their systems not to start at all.
So, this is actually required to get a safe and stable startup.
Have a great day,
Yuri
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