MKE02Z64 default bus clock after POR

guide19 — Fri, 18 Oct 2013 06:10:01 GMT

Hi,

what is the default bus clock of the MKE02Z64 device after POR?

BR,

Jozef

Re: MKE02Z64 default bus clock after POR

kerryzhou — Fri, 18 Oct 2013 07:01:48 GMT

Hi Jozef Prokopovic,

Thank you for your question in our community!

For understanding the bus clock after POR, we need to know which clock modes after POR. When there is a POR, the clock modes goes to FEI(FLL engaged internal).

The clock route is as follows picture:

so the bus clock is calculated following the formula:

fbus=(fIRC*1024)/2. (1)

About fIRC frequence, if you are not trim it, it the factory value, is 32.768kHz, so the fbus is about 16.77Mhz. If you have trimmed it ,then fIRC frequence is your trim value.but it is between 31.25–39.0625 kHz , then you can calculate it refer to formula (1)。

You can find the details in the reference manual.

I hope it helps you!

Best regards!

Jingjing

Kinetis Microcontrollers中的主题 MKE02Z64 default bus clock after POR

MKE02Z64 default bus clock after POR

Re: MKE02Z64 default bus clock after POR