How to configure an external crystal for KL05 in Processor Expert Software?

[thoomanwang]

I tried Processor Expert Software Software for KL06Z16 configure an external crystal , but I tried all the usual crystal , are unable to set the system frequency to 48MHz.
Am I doing something wrong is it ?

[thoomanwang]

This issue has been resolved , the KL04, 05 can only use the internal oscillator or an external 32.768KHz crystal oscillator frequency can configure the system to 48MHz, other crystals are not available .

[Petr_H]

Hi,

Yes, you can use 32 kHz but generally, you can use  any crystal up to 32 MHz in a bypass mode or with FLL engaged.

If you want to get 48MHz core clock you can also use 9.6MHz crystal (the FLL clock generator has only few options of multiplication so the number of possible clock values is quite limited).

You can set it up in the Processor Expert CPU component using the inspector the following way:

best regards

Petr Hradsky

Processor Expert Support Team