How to output system clock on a GPIO pin

eigen — Thu, 31 Dec 2015 06:43:52 GMT

I have a Kinetis KL03Z board. I try to output the 48MHz system clock on a GPIO pin for some other use, but have a hard time finding related information of doing this. Please advise. Thanks.

Re: How to output system clock on a GPIO pin

Alice_Yang — Mon, 04 Jan 2016 08:45:24 GMT

Hello Eigen,

You can use the CLKOUT pin to output the clock:

For example ,

- you can configure the bus clock to 48MHZ,

- then configure the PTA4 pin to CLKOUT through the register of PORTx_PCRn -> MUX ;

- then configure the CLKOUT pin output BUS clock through

the register of "SIM_SOPT2" -> CLKOUTSEL to " 010 "

Hope it helps

Have a great day,
Alice Yang

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topic How to output system clock on a GPIO pin in Kinetis Microcontrollers

How to output system clock on a GPIO pin

Re: How to output system clock on a GPIO pin