I'm using S32KDS to config the clock of S32K144.
I tried to set SOSC frequency to 4 MHz when SOSC range is selected as medium. However an error exists (as is shown in the picture). It says 'Output frequency must in the range: 8 MHz ~ 40 MHz (See constraint 1)' (translated from chinese). So, can 4 MHz oscillator be used as SOSC, or why shouldn't it be used?
Also, when I set 'External reference select' to 'External reference clock', the error disappears. But I didn't find any related limits in reference manual (S32K1XXRM Rev. 14, 09/2021) or datasheet (S32K1xx Data Sheet Rev. 14, 08/2021).
S32DS version: 3.5.2 230226 (Update 2)
Package version(not sure whether this package is used): S32K1xx development package 1.0.0
Hi zhaoxinping,
Do you need PLL?
If PLL is used, then oscillator needs to be in high range only, SCG_SOSCCFG[RANGE] on 11 as used in reference clock.
When SCG_SOSCCFG[RANGE]=11 , frequency of selected crystal oscillator should be 8 MHz to 40 MHz.
Best Regards,
Robin
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