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How to change PLL_SYS frequency on i.MX6 to 480 MHz

Question asked by Denis Grigoryev on Mar 6, 2017
Latest reply on Mar 6, 2017 by igorpadykov

Hello!

 

According to chapter 18.5.1.3.3 of i.IMX6 Reference Manual:

Although this PLL does have a DIV_SELECT register field, it is intended that this PLL
will only be run at the default frequency of 528 MHz.

 

We have specific EMI issues with our i.MX6 board and want to try to switch PLL_SYS to 480 MHz anyway. How can this be done? We tried spread spectrum feature but it brings no relief since the third harmonic of spread clock gets into the sensitive area.

 

Regards,

Denis.

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