topic Re: MCUXpresso and kl26z64 Clock config in Kinetis Microcontrollers

MCUXpresso and kl26z64 Clock config

grochal7 — Tue, 09 Oct 2018 09:05:09 GMT

Hello!

What is the difference beetween clock configuration of KL26Z128vlh4 and KL26z64vft4?

I am using the mcuxpresso config tool and my kl26z64vft.

I am testing some program with internal reference closk, it works fine.

Then, I set the external clock (i am using 8mhz oscilator) like this:

My mcu not working with this settings, (and on kl26z evaluation board working fine).

Am I missing something?

Regards!

Re: MCUXpresso and kl26z64 Clock config

Robin_Shen — Wed, 10 Oct 2018 06:28:50 GMT

Hi Bony X,

I try to create new configuration for FRDM-KL26Z board, it's using 8MHz external crystal on board by default.
Not sure if the external clock circuit of FRDM-KL26Z are same with yours.

Would you please show us the schematics?

Best Regards,

Robin

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Re: MCUXpresso and kl26z64 Clock config

mjbcswitzerland — Wed, 10 Oct 2018 08:33:09 GMT

Check whether you are using a crystal or an oscillator since they are not the same.

Also, if using a crystal, experiment with setting and removing the HGO flag in the register MCG_C2 since this setting must match your circuit loading for the crystal to reliably start.

As reference: if it works on the FRDM-KL26Z it means that it works for a crystal in low gain mode (no feedback resistor mounted).

Regards

Mark

Re: MCUXpresso and kl26z64 Clock config

grochal7 — Wed, 10 Oct 2018 09:32:42 GMT

Thanks Robin and Mark for answers,

I removed the feedback resistor and changed the cristal.

It is working now :smileywink:

Best Regards!