topic Re: S32K116 clock generator circuitry in S32K

S32K116 clock generator circuitry

guxiaoliang — Thu, 13 May 2021 06:37:32 GMT

FS32K116LIT0VLFT 与 FS32K116LAT0MLFT

The difference between the internal clock generation circuit of the two chips.

I have been using FS32K116LAT0MLFT and the crystal oscillator works fine.

Now with FS32K116LIT0VLFT , after the crystal oscillator works for a period of time, the impedance of EXTALpin to ground becomes low, close to 0. The impedance is normal after a few hours。

Re: S32K116 clock generator circuitry

davidtosenovjan — Thu, 13 May 2021 07:38:10 GMT

Hi, it does not sound too much probable. Both devices are very similar.

Are there other differences or you have only replaced the MCU? I would rather expect a hardware issue with this simgle MCU or crystal circuit? or doe you have more devices affected?

Re: S32K116 clock generator circuitry

guxiaoliang — Fri, 14 May 2021 06:23:17 GMT

I replaced the crystal, and the phenomenon reappeared after a night of normal work. I removed the crystal and the impedance of the pin to ground was normal, but why is the crystal always broken?

Do not rule out irregular channel purchases

Re: S32K116 clock generator circuitry

davidtosenovjan — Fri, 14 May 2021 06:55:43 GMT

This is an issue of this single devices, or you have multiple devices with the same issue? Do you have crystal circuit connected according recommendation?