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FRDM-KL25Z not responding to VLLSx wakeup sources?

Question asked by richardschloss on Jun 18, 2013
Latest reply on Jul 31, 2013 by Allen Zhan

Hey All,


I've searched the forums and checked various application notes already, yet I'm struggling to exit the VLLSx mode when I am using an external pin as the wakeup source.  According to AN4503.pdf:


"For LLS, VLLS3, VLLS2, VLLS1, and VLLS0 the wake-up events are limited to the enabled LLWU wake-up pins and

modules. The pin can be a wake-up source as long as the pin is enabled as a digital source in the Pin Control Register."


I'm doing this yet I fail to exit the VLLSx mode.  I have tried the example "Low-power demo" in the kl25sc with not 100% success.  I can enter the VLLSx modes no problem.  It's only after I attempt to use the associated LLWU pin (say, PTC3 / LLWU7 ) that I have absolutely no response.  I have also tried other LLWUx pins without success.


As an example, please let me know if you can:

1) Enter VLLS1 when an I/O pin goes low (say PTD6 / LLWU15 or PTC3 / LLWU7).

2) Exit VLLS1 when that same I/O pin goes high


This request is for the FRDM-KL25Z Rev. D board.

Help is appreciated! Thanks in advance,