Is the 32 KHz clock for the k22f12810 chip enabled by default or with the call CLOCK_SYS_EnablePortClock(PORTE_IDX)?

[brendanmerna]

If this isn't enabled by defualt what API would you use to enable this clock output.

[Robin_Shen · Accepted solution]

Hi Brendan Merna,

It's not enabled by default.
Please refer the description in '5.7.7 RTC_CLKOUT and CLKOUT32K clocking' of K22P121M100SF9RM.

You need to configure the SIM_SOPT1[OSC32KSEL] \ SIM_SOPT1[OSC32KOUT] and configure PORTx_PCRn[MUX] select Alternative1.

Best Regards,

Robin

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[brendanmerna]

Thanks Robin! That's exactly what I needed. I was having trouble finding that in the data sheet. 32KHz clock works now.