topic Re: How to using LLWU to wake KL25Z from VLLS3 mode in Kinetis Microcontrollers

How to using LLWU to wake KL25Z from VLLS3 mode

pengliang — Fri, 26 Oct 2012 19:05:34 GMT

Is there any tutorial about this?

If anyone knows, please refer to me

Thanks in advance

Re: How to using LLWU to wake KL25Z from VLLS3 mode

JimDon — Fri, 26 Oct 2012 19:25:13 GMT

This is the LLWU sample from the sample code. See KL25_SC.exe.

http://www.freescale.com/files/32bit/software/KL25_SC.exe

Re: How to using LLWU to wake KL25Z from VLLS3 mode

eduardo_viramon — Fri, 26 Oct 2012 19:34:11 GMT

There are a couple of app notes that should give you all the info you need:

http://cache.freescale.com/files/32bit/doc/app_note/AN4503.pdf?fsrch=1&sr=3

And

http://www.freescale.com/files/microcontrollers/doc/app_note/AN4470.pdf

Also notice that the KL25_SC code has a demo project that shows the KL25 going into all the low power modes, you can use that code as a reference for your own code:

KL2 Product Summary Page

Re: How to using LLWU to wake KL25Z from VLLS3 mode

pengliang — Fri, 26 Oct 2012 19:59:51 GMT

There are a few samples in the sample code, which one is the LLWU tutorial?

I went through out them, could not find it for LLWU

Thank you

Re: How to using LLWU to wake KL25Z from VLLS3 mode

JimDon — Fri, 26 Oct 2012 20:08:25 GMT

As long as you are using Keil or IAR, since they to to have forgotten to include the CW projects for bare metal.

I tried out the Keil Low Power demo one and it works fine, I suggest you download Keil MDK and try out the free version.

Re: How to using LLWU to wake KL25Z from VLLS3 mode

pengliang — Fri, 26 Oct 2012 20:10:24 GMT

I can enter each LLPS mode. However, I dont know how to generate interrupt / reset event to exit. There is no sample code provided to exit LLPS mode. I tried many ways but with no luck

where should I write the code. after asm"WFI"? or should be in the Cpu_OnLLSWakeUpINT(), I am using RTC to wake up the MCU from VLLS3 mode. the application notes say about using interrupt or reset to exit VLLS3, but it did not say how. I am quite new to freescale MCU. Please give more detailed hint,

Thank you very much

Re: How to using LLWU to wake KL25Z from VLLS3 mode

pengliang — Fri, 26 Oct 2012 20:14:20 GMT

Thank you

I have CW 10.3, Does the file also work for CW?