LPC Microcontrollers中的主题 Re: LPC54608 external cystal configuration

LPC54608 external cystal configuration

prathap_ponnuch — Wed, 29 Jul 2020 06:07:05 GMT

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

Re: LPC54608 external cystal configuration

ZhangJennie — Wed, 29 Jul 2020 09:17:25 GMT

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.

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:

Have a great day,
Jun Zhang

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Re: LPC54608 external cystal configuration

prathap_ponnuch — Mon, 03 Aug 2020 14:13:12 GMT

Hi Jun Zhang,

Thanks for replay and Sorry for the delay.

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

Thanks in advance.

Regards,

prathap

Re: LPC54608 external cystal configuration

ZhangJennie — Tue, 04 Aug 2020 01:52:52 GMT

Follow below steps to go to clock config tool

Have a great day,
Jun Zhang

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