S32KのトピックRe: The synchronous interrupt and asynchronous interrupt generated by the CMU_FC module.

The synchronous interrupt and asynchronous interrupt generated by the CMU_FC module.

Pusoy — Mon, 27 Nov 2023 01:32:55 GMT

Hi,

I am currently in need of using the CMU module and while reading the CMU_FC section under the Safety chapter of the S32K3XXRM manual, I discovered that for the interrupts generated by FC_0, there are two types: asynchronous event interrupt and synchronous event interrupt.

Could you please explain the differences between these two types of interrupts?

Re: The synchronous interrupt and asynchronous interrupt generated by the CMU_FC module.

danielmartynek — Tue, 28 Nov 2023 08:25:06 GMT

Hi @Pusoy,

The destructive reset is bond with the asynchronous mode, whereas the synchronous mode generates the CMU interrupt only.

Have a look at Figure 110. Frequency checking (FC) instances in the RM.

Please note that there is an error in the image.

Swap the labels indicated by the arrows.

Best regards,

Daniel

Re: The synchronous interrupt and asynchronous interrupt generated by the CMU_FC module.

Pusoy — Thu, 07 Dec 2023 07:13:08 GMT

Thanks for the reply, but I have a question.
According to the figure you provided, can I understand this way: for CMU_FC0, the FHH event can only be configured as a destructive reset event, and the FLL event can only be configured as an interrupt event.

Re: The synchronous interrupt and asynchronous interrupt generated by the CMU_FC module.

danielmartynek — Thu, 07 Dec 2023 08:20:05 GMT

Hi @Pusoy,

Both can generate either synchronous or asynchronous events.

The diagrams in my first post have been reported.

Regards,

Daniel