board with no external crystal or clock

[momo12]

Hi

I want to design a S32k144 board with no external crystal or clock. Is it possible?

The point is that in processor expert under clock sources, for SPLL_CLK I can only choose SOSC as reference. 

Or am I missing some thing?

Thx

[danielmartynek]

Hi,

Please see Figure 26-1 in the Reference Manual.

Only OSC can be used as a clock source for PLL.

Without OSC, you need to use FIRC or SIRC directly.

Regards,

Daniel