I'm trying to clock a Kinetis MK20FX512 at 96MHz core clock speed and 48MHz bus speed with Processor Expert. I have a 32.768kHz crystal attached to XTAL32/EXTAL32 (with nothing on XTAL0/EXTAL0 and XTAL1/EXTAL1) and I am able to set the following configuration manually in code:
This produces the desired core clock speed of 96MHz and bus speed of 48MHz. Using processor expert, I can't select XTAL32/EXTAL32 as the clock source for the RTC (only RTC_CLKIN is available) or the DMX32 and DRST_DRS values to get the clock to 96MHz. The highest value seems to be 47.972352MHz. Is this a problem with my configuration or with Processor Expert?
Solved! Go to Solution.
Hello Simon Haines:
Please let us know the version of Processor Expert or the IDE version that you are using (Codewarrior or Kinetis Design Studio).
Are you sure you selected K20FX512 from the New Project Wizard?
This device does not have any RTC_CLKIN pin, only the XTAL32/EXTAL32 pins for the crystal.
Using KDS v3.1.0 I do not have any issues to set your required configuration, see below:
Regards!
Jorge Gonzalez
Hello Simon Haines:
Please let us know the version of Processor Expert or the IDE version that you are using (Codewarrior or Kinetis Design Studio).
Are you sure you selected K20FX512 from the New Project Wizard?
This device does not have any RTC_CLKIN pin, only the XTAL32/EXTAL32 pins for the crystal.
Using KDS v3.1.0 I do not have any issues to set your required configuration, see below:
Regards!
Jorge Gonzalez
Thanks Jorge, double-checking my setup shows I had indeed selected the wrong chip (off by one error ha ha). Thanks for taking the time to reply.