S12ZVM, clocks slow after STOP mode and wakeup via LIN

[timothyschnobel]

I'm trying to get stop mode working with the s12zvm. We are waking via the LIN bus. The design uses the internal clock. I'm able to sleep and wake, but when I wake my clocks are running extremely slow (seems like 12.5MHz down to something like 18KHz). I've tried reinitializing the CPMU subsystem and waiting for CPMUIFLG_LOCK, but my clocks are still slow. What am I missing? Since all the clocks are killed by STOP, is there a reinitialization sequence I'm supposed to go through after waking up via LIN? Thanks

[danielmartynek]

Hi,
There is no reinitialization sequence.
PLLSEL is set automatically, when it enters Stop mode.
Out of Stop mode, it runs on PLLCLK (PEI mode) and tries to lock. (Figure 8-42, RM)

So, it hangs waiting for CPMUIFLG_LOCK?
What is the bus clock frequency before Stop mode?
Can you share the PLL configuration code?

Regards,
Daniel