We are developing the custom board with MK22FN1M0AVMC12 device.
In the manual (K22P100M120SF5V2RM Rev. 5) Table 7-2. Module operation in low power modes,
it is described that System oscillator specification (at VLPS mode) is
" OSCERCLK max of 4 MHz crystal ".
We use a 12MHz oscillator which is connected to EXTAL0 pin.
When chip is in VLPS mode,
is it necessary to stop the OSCERCLK via 12MHz oscillator which is connected to EXTAL0 pin ?
If it is unnecessary to stop the OSCERCLK ,
we hope to use the LPTMR which is clocking OSCERCLK(12MHz) in order to wake up from VLPS mode.