MPC5xxxのトピックGet the microcontroller clock frequency

Get the microcontroller clock frequency

曾经怀念 — Mon, 14 Nov 2016 02:18:44 GMT

Hi all，

How can I Getting the microcontroller clock frequency. So, I could use to change the CAN or LIN baud

Regards

Re: Get the microcontroller clock frequency

lukaszadrapa — Mon, 14 Nov 2016 09:23:54 GMT

Hi,

which device do you use?

Regards,

Lukas

Re: Get the microcontroller clock frequency

曾经怀念 — Mon, 14 Nov 2016 11:20:26 GMT

Hi Lukas,

MPC5606B

Regards

Re: Get the microcontroller clock frequency

lukaszadrapa — Mon, 14 Nov 2016 12:11:07 GMT

By default, the device is running at system clock frequency given by internal RC oscillator 16MHz. Then it's a matter of your software. Take a look at this example to see how to initialize mode and clocks:

https://community.nxp.com/docs/DOC-329441

Here you can find PLL calculator which can help you to do own configuration:

https://community.nxp.com/docs/DOC-332694

If you want to confirm the system clock frequency by measurement, use CLKOUT pin (must be configured by SW, see reference manual for more details).

Regards,

Lukas