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Author Topic: Kinetis K20 80 pin Clock Question  (Read 2254 times)

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Offline mtechmattTopic starter

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Kinetis K20 80 pin Clock Question
« on: November 13, 2013, 06:53:25 pm »
Hi everyone...

Tech question...

We want to run  Freescale Kinetis K22 at 120MHZ, which it can do, but the the only XTAL pins on the device are the XTAL32 (for RTC)... Can the FLL/PLL really clock up from this to 120MHZ or am I seeing something wrong?

datasheets:
http://cache.freescale.com/files/32bit/doc/ref_manual/K22P80M120SF5RM.pdf?fpsp=1&WT_TYPE=Reference%20Manuals&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation

Any help much appreciated!

Matt
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Offline dciliske

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Re: Kinetis K20 80 pin Clock Question
« Reply #1 on: November 14, 2013, 10:53:09 pm »
The primary oscillator input is XTAL0 (pin 41) and EXTAL0 (pin 40). You'll find it listed in the pinout table on page 229 of the linked manual.
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