topic Re: Kinetis K24 Clock in Kinetis Microcontrollers

Kinetis K24 Clock

smathad — Mon, 03 Feb 2020 06:35:48 GMT

Hello all,

I am working on the NXP K24 clock. I see that there are multiple clocks available to choose from. While the reference manual does give some description about the clocks, it is very generic.

I did not find a document explaining me the exact use of each of these clocks.

Can somebody explain to me the use case of each of these clocks? I have listen them below.

MCGIRCLK
MCGFFCLK
Core/System Clocks
Bus clock
FlexBus clock
Flash Clock
MCGPLLCLK/MCGFLLCLK
OSCERCLK
ERCLK32K
LPO
RTC_CLKOUT

Thanks

Sachin

Re: Kinetis K24 Clock

kerryzhou — Mon, 03 Feb 2020 14:25:34 GMT

Hi Sachin Mathad ,

Thanks for your interest in the NXP kinetis product, I would like to provide service for you.

About the use case of each clock, in fact, you can refer to the MK24 reference manual , Chapter 5 Clock Distribution.

5.4 Clock definitions, this chapter told you each clock usage.

Table 5-2. Module clocks, told you each module clock situation.

Please read the MK24 reference manual clock distribution chapter at first.

https://www.nxp.com/webapp/Download?colCode=K24P144M120SF5RM

If you still have questions about it, please kindly let me know.

Have a great day,
Kerry

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Re: Kinetis K24 Clock

smathad — Tue, 04 Feb 2020 07:22:09 GMT

Hi Kerry,

Thank you for your response.

I did find that table helpful.

Can you please let me know the difference between bus interface clock, internal clock and I/o interface clock in that table?

Regards,

Sachin

Re: Kinetis K24 Clock

kerryzhou — Wed, 05 Feb 2020 07:51:42 GMT

Hi Sachin Mathad,

You are welcome!

Bus interface clock, you can consider the related module register control clock.

Internal clocks, you can consider it as the module clock, now take LPTMR as an example

You can find the LPTMR internal clocks is the module clock.

I/o interface clock is the clock which is input or output to the related IO pins.

Wish it helps you!

If you still have questions about it, please kindly let me know.

Have a great day,
Kerry

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