LPC54608 external cystal configuration

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LPC54608 external cystal configuration

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prathap_ponnuch
Contributor I

Hi All,

I am using LPC54608 mcu for our project.

In this 25MHz crystal is there.

Internal 12MHz FRO running successfully with this board.

But we need to configure 25Mhz external crystal oscillator how to configure?

How to set with external oscillator?

Thanks in advance.

Regards,

prathap

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prathap_ponnuch
Contributor I

Hi Jun Zhang,

Thanks for replay and Sorry for the delay.

pastedImage_1.png

Here cant able to see clock config setting.Where we need to go and set?

Thanks in advance.

Regards,

prathap

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ZhangJennie
NXP TechSupport
NXP TechSupport

Follow below steps to go to clock config tool

pastedImage_1.png

pastedImage_2.png

Have a great day,
Jun Zhang

 

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ZhangJennie
NXP TechSupport
NXP TechSupport

Hi prathap ponnuchamy 

You can easily config clock with Clock Config tool integrated inside MCUXpresso IDE. 

By default, fro_12M is used as PLL input to provide system clock. 

if you want to use external clock as pll input, just config SYSPLLCLKSEL to select clk_in as source. see below.

pastedImage_3.png

your external clock is 25M, just config sys osc as 25Mhz, you need make sure PLL output frequency range is between 275MHz-550MHz.

after configuration, don't forget update code:

pastedImage_4.png


Have a great day,
Jun Zhang

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