How to set the system clock frequency through registers in LPC845brk

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How to set the system clock frequency through registers in LPC845brk

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tomato
Contributor III

Hello,

 

I see that in MCUexpresso IDE there is this useful tool to change the system clock frequency

tomato_0-1673362935137.png

Can you tell which registers are changed when I set for instance 24MHz?

 

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RaRo
NXP TechSupport
NXP TechSupport

Hello @tomato,

Could you please read the LPC845 User Manual Chapter 8: LPC84x System configuration (SYSCON) (8.6 Register description) and Chapter 9 LPC84x FRO API ROM routine ()?

There you may find more information about the FRO_OSC and System clock generation trough the registers.

Best regards, Raul.

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