How to get Low Current in vlps mode

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How to get Low Current in vlps mode

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myna
Contributor III

Hello. NXP Team.

I have a problem that I can not get low current in VLPS Mode.

Now I am using s32k118. And I did check below s32k datasheet.

s32k118 --> 26uA or 38 uA

pastedImage_1.png

So. I refer to below link

S32K144EVB-Q100 VLPS current 

And I added below code.

* Disable UART in doze mode

* Disable FIRC, SOSC

* PMC->REGSC  CLKBIASDIS = 1

* PMC->REGSC  BIASEN = 1

But the Board is measured 20mA. I want to get a lower current(26uA).

Is there anything else I need to do?

Thank you.

Best regards.

MinYeop.

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danielmartynek
NXP TechSupport
NXP TechSupport

Hello MinYeop.

Where do you measure the current? J15?

Please make sure that the MCU does not drive any external load. 

pastedImage_1.png

Is the MCU in VLPS? You can measure BUS_CLK on a CLKOUT port. 

Have you tried the power_mode_switch_s32k118 SDK example?

Please disconnect the debugger, power-cycle the board and run the MCU stand-alone.

Thank you, 

Daniel

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