Hello community,
I´m currently working with the s32k144 microcontroller using the clock configuration tool in s32 Design Studio.
I would like to clarify if it is possible to select the reference clock source for the SPLL, between the SOSC and the FIRC, and if so, what is the proper procedure or configuration steps to achieve this in the tool.
thank you.
Hi@ernesto97xn
Can I understand your question as asking if the external input frequency can be between 8 and 48 MHz?
This is possible. You can use a separate clock chip as the clock source for the S32K1, with a frequency range between 4 MHz and 40 MHz.
As shown in the diagram below, you can try directly modifying the SOSC frequency.
Thank you for you respons.
My question was specifically about the clock source accepted by the SPLL. I was reading the manual, and what I found is that, for the S32K144 family, this particular clock configuration is only supported on the S32K144W variants, as shown in the image on the left.
Hi@ernesto97xn
These info can be found in S32K1xx-RM， chapter ：27.2 High level clocking diagram
