topic Re: CMU_FC destructive reset configuration in S32K

CMU_FC destructive reset configuration

FabioG — Sat, 09 Mar 2024 10:34:39 GMT

Hi There,

1) I looking for configuring CMU_FC peripheral (Chapter 54). Revision 8 of reference manual.

There no explicit reference (I don't find it ...) about setting destructive reset, but in logic network at Chapter 24, par 8 "Clock Monitoring, page 960 "Figure 115. Frequency checking (FC) instances" seems that to enable destructive reset we have to enable asyncronous interrupts FHHAIE and FLLAIE as shown for FC4,5,3 is it true ?

2)And why for fc0 and Fc6, in order to enable destructive reset is activated FHHIE (Syncronous Upper threshold!! ) on the LOWER threshold path , and for the interrupt activation is set FLLAIE (Lower Asyncronous)for the UPPER threshold path ? is it a mistake or a feature ? (see attached file)

2) in revision 5 of manual there was not present FC6 (CM7_CORE_CLK). what is the difference with FC3(CORE_CLK) ?

Best Regards

Fabio

Re: CMU_FC destructive reset configuration

danielmartynek — Tue, 12 Mar 2024 11:14:03 GMT

Hi @FabioG,

This is under an internal discussion at the moment.

FC_6 is available on S32K388 only.

danielmartynek_0-1710242001591.png

Regards,

Daniel

Re: CMU_FC destructive reset configuration

FabioG — Tue, 12 Mar 2024 13:12:51 GMT

Regarding point 1: in order to checkCMU_FC Distructive reset, what I need to configure in CMU_FC?

Best Regards,

Fabio

Re: CMU_FC destructive reset configuration

danielmartynek — Wed, 13 Mar 2024 08:56:08 GMT

Hi @FabioG,

Based on the latest update, the diagrams should be fixed in the next RM release.

Both FLL and FHH can generate either an interrupt or reset. The destructive reset is bond with the asynchronous mode, and the synchronous mode only generate the interrupt.

Regards,

Daniel