How to set the clock source for TIM3

[pass3master]

How to set the clock source for TIM3

We are trying to use TIM3. We also want to use an external CLK as the clock source for TIM3, but we don't know how to set it.

.ioc file - Where should I change the TIM3 clock source settings?

[STTwo-32]

Hello @pass3master 

Could you please provide the MCU you are Using.

Best Regards.

STTwo-32

[pass3master]

The MCU we are using is STM32H743ZIT6.

[SofLit]

Hello,

From the reference manual RM0433: / section 39.3.3 Clock selection:

You can select an external clock source for TIM3:

In CubeMx:

[pass3master]

That was a very easy-to-understand answer. Thank you.
If I select Internal Clock, what will be the accuracy and error of CLK?

[SofLit]

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@pass3master wrote:

If I select Internal Clock, what will be the accuracy and error of CLK?

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It will be the accuracy of the system clock source: HSE/HSI etc ..

HSI, CSI accuracies are provided in the datasheet. HSE depends on the clock source you put as input.

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