MQX Software SolutionsのトピックK20 Internal Clock FLL doesn't work

K20 Internal Clock FLL doesn't work

markkalior — Mon, 14 Sep 2015 16:10:08 GMT

Based on the K20P121100SF2V2RM.pdf and Processor Expert, I can select the internal 32.768Khz clock and still use FLL.

MCG mode = FEI

SIM_SOPT2 = PLLFLLSEL(0)

SIM_SOPT1 = OSC32KSEL(2)

MCG_C1 = 0x07

MCG_C2 = 0

MCG_C4 = 0xE0

OSR_CR = 0

MCG_C7 = 1

MCG_C5 = 0

MCG_C6 = 0

MCG_S & 0x10 (IREFST) is 0, should go to 1, but doesn't. and CLKST is 3

What am I doing wrong?

Re: K20 Internal Clock FLL doesn't work

jeremyzhou — Thu, 17 Sep 2015 03:03:36 GMT

Hi Mark,

I'd highly recommend you to using the clock mode configuration function that created by Processor Expert directly.

If you have any other questions, just feel free to contact with me.
Have a great day,
Ping

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