topic K64F VLPS Current Problem in Kinetis Microcontrollers

K64F VLPS Current Problem

parkjaichang — Fri, 13 Apr 2018 00:59:17 GMT

Hi I'm using the Hexiwear (K64F Family) and MCUXpresso IDE.

My Debugger is Hexiwear Docking Station.

I tried to VLPS mode from VLPR. But VLPS current is to High.(About 9 - 10mA measured a whole board)

First. I Copied and pasted Reference Code a.

Second. Fixed Clock Frequency(Used MCUXpresso Config Tool) and LLWU pin ( changed PTC6 to PTA4 ( LLWU_P3) )

Then, Debugging and measurement current value.

I attached Two zip file of My code.

1. Hexi_Project.zip : power_manager code
2. MK64FN1M0xxx12_Project : power_mode_switch code

Questions

How to Fix this problem.?
I read AN4503 2.3.9 VLPS (page11) but How to set debugger disable in MCUXpresso IDE?

Thanks

Jeffrey.

Reference Code.

1. SDK_2.3.1_FRDM-K64F\boards\frdmk64f\demo_apps\power_manager
2. SDK_2.3.1_FRDM-K64F\boards\frdmk64f\demo_apps\power_mode_switch
3. AN4503 : Power management for Kinetis MCUs.
4. An4470 :Using Low Power modes on Kinetis Family

Re: K64F VLPS Current Problem

Hui_Ma — Mon, 16 Apr 2018 05:33:27 GMT

Hi,

Please remove the debugger tool, then let the application running from internal Flash and measure the power consumption at VLPS mode.

Wish it helps.

Have a great day,
Mike

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: K64F VLPS Current Problem

parkjaichang — Tue, 17 Apr 2018 11:58:23 GMT

How to remove the debugger tool? and How to Set the application running from internal Flash?

Can I get some References and method??

Thanks

Re: K64F VLPS Current Problem

Hui_Ma — Wed, 18 Apr 2018 08:59:44 GMT

Hi,

The SDK V2.3.1 [power_manager] or [power_mode_switch] demo default running from internal Flash.

During project debug phase(through DEBUG panel), the demo was programmed to K64 internal Flash.

After that, customer can power off the K64 board and remove the debugger tool, then power on K64 board and the demo will run from internal Flash.

From the serial console, customer can select the VLPS low power mode and measure the power consumption.

Wish it helps.

Have a great day,
Mike