KW41Z VLLS mode wakeup NOT working for example code

[sandeepkamath]

Hi,

I was working with different power modes and had a query regarding the same.

How to wakeup from VLLSx mode in KW41Z platform. LPTMR( LLWU) works well for LLSx mode. But i am not able to wakeup using LPTMR( LLWU) from VLLSx mode.

Development board used: KW41Z

Example code: demo_apps_power_manager, demo_apps_power_mode_switch

Can you please suggest

Kind Regds,

Sandeep

[gerardo_rodriguez]

Hello Sandeep,

I just tested the demo_apps_power_mode_switch example from the current KW41 SDK (2018-04-16) downloaded from the MCUXpresso SDK builder and was able to wake up with the LPTMR from VLLS1-3 modes successfully.  For VLLS0, the LPTMR is not available because in this mode, the 1 kHz LPO is off. You would need to bypass the 32kHz oscillator and provide an external 32k clock signal through EXTAL32K pin. For more information, you can refer to the Table 8-2. Module operation in low power modes from the KW41 reference manual:

Hope this helps.

Regards,

Gerardo