Wireless MCUのトピックRe: KW36 wake up form VLLS3

KW36 wake up form VLLS3

zhangxiwe — Wed, 25 May 2022 06:58:20 GMT

hello!

I used MCU KW36Z512 chip and found that when debugging low power, set to VLLS2 and VLLS3, the system can not wake up, and when set to VLLS1, can normally wake up reset, do not know why!

Re: KW36 wake up form VLLS3

zhangxiwe — Wed, 25 May 2022 07:03:18 GMT

I am using the FRDM-KW36 / demo_apps / power_manager source.

I can't find VLLS1 & VLLS3 different

Re: KW36 wake up form VLLS3

EduardoZamora — Wed, 25 May 2022 19:29:03 GMT

Hi,

Just to confirm, are you using the FRDM board or is it a custom board?

Could you please help me with the version of the SDK you are using?

Once the application is running, which options are you selecting and what is the result?
For example, VLLS1 -> LPTMR -> 5 seconds: system wakes up normally.

Regards,
Eduardo.

Re: KW36 wake up form VLLS3

zhangxiwe — Thu, 26 May 2022 02:18:15 GMT

Hi,

I 'm using my custom board, my SDK version is V2.2.

VLLS1--LPTIMR-->9 Seconds system wakes up normally-->system is reset -->It's Good!

VLLS3--LPTIMR-->9 Seconds system wakes up normally, bus can't wakes up, system can't reset！--》It's fail!

Thanks!

Re: KW36 wake up form VLLS3

EduardoZamora — Thu, 26 May 2022 22:26:28 GMT

Hello,

Just to be sure, are you planning to use the BLE features? If so, could you please help me by consulting these guides?

Kinetis MKW36 Power Consumption Analysis

Hardware Design Considerations for MKW35A/36A/35Z/36Z Bluetooth Low Energy Devices

Regards,
Eduardo.

Re: KW36 wake up form VLLS3

zhangxiwe — Fri, 27 May 2022 15:34:32 GMT

Hello!

Yes,I 'm using KW36 BLE, and I had readed those guides! found kw36 can't used VLL30; OK! I try to use VLLS2 ,But the result same liked VLLSE3. Can't wake up !

what can i do for it?

thanks ！

Re: KW36 wake up form VLLS3

EduardoZamora — Fri, 27 May 2022 21:17:32 GMT

Hi,

Could you please tell me if your custom board design integrates a 32kHz external crystal?

Regards,
Eduardo.

Re: KW36 wake up form VLLS3

zhangxiwe — Sat, 28 May 2022 04:20:33 GMT

Hello.

Yes! I used 32K crystal for RTC ,and 26M crtstal for RADIO 。I will use I2C、SPI、LPtime、LLWU function。 I want to my board can wake up from VLLS2 ,and not lost RAM data 。 In VLLS1 mode ,wake up for reset lost RAM data!

Thanks!

Re: KW36 wake up form VLLS3

EduardoZamora — Mon, 30 May 2022 23:11:56 GMT

Hi,

Are you planning to use BLE together with low power? If so, please check the heart rate sensor (hrs) example inside wireless_examples/bluetooth from the SDK, it integrates both BLE and low power features. Please, let me know if you can run the application on your board and test it by using IoT Toolbox app in a mobile device.

Regards,
Eduardo.

Re: KW36 wake up form VLLS3

zhangxiwe — Wed, 01 Jun 2022 14:24:13 GMT

I am planing to use BLE with low power. But ,I didn't use Hrt sample. I will check it !

Thank!

Re: KW36 wake up form VLLS3

EduardoZamora — Wed, 01 Jun 2022 22:53:12 GMT

Please, let me know any news once you have run your tests.

Regards,
Eduardo.