problem for Core-M4 systemtick clocksource

[AaronsCook]

Hi, All

I have a question what is the Core-M4 systemtick clock source When use K60？

I configure the systick as

SysTick->CTRL  = SysTick_CTRL_CLKSOURCE_Msk |

                           SysTick_CTRL_TICKINT_Msk   |

                           SysTick_CTRL_ENABLE_Msk;  

SysTick_CTRL_CLKSOURCE_Msk means CLKSOURCE = 1

CLKSOURCE Indicate s the clock source:

  0 = external clock

  1 = processor clock.

CLKSOURCE = 1 means select processor clock.

What is processor clock in the K60? It is core clock such as 100Mhz?

Thank you

Best Regards

Wang Song

[kerryzhou · Accepted solution]

Hi, Wang Song

    I think this picture from reference manual will help you to understand what is the core clock of MCU.

Best regards!

Jing

[AaronsCook]

Hi,Jing

Thank you for your help.

Best Regards

Wang song

[Paul_Tian]

Hi, Wang Song

The core clock depends on your clock setting. In our reference manual, you can find core clock is MCGOUTCLK divided by OUTDIV1 clocks the ARM Cortex- M4 core in chapter "clock distribution". So it depends on your MCG module setting.

Hope my reply can help you.

Best Regards

Paul