how to get current consumption in sleep mode on STM32L4q5gt6p MCU as per the datasheet.

BGajj.1 · ‎2023-01-20

Hello,

I am using STM32L4q52gt6P controller. for application development, I am using freeRTOS.

When no task running in RTOS at that time I put the controller in sleep mode from the idea task of RTOS.

I have used 12Mhz of HSE, 16Mhz-SYSCLK with PLLCK, AHB Prescaler -1, HCLK 16Mhz, and most of the GPIO are used.

Also, I am using external SMPS for VDD1V2.

My MCU current Consumption is around 3.24mA in run mode and 1.2mA in Sleep mode.

I have added a snap of the datasheet STM32_RUN_MODE

I want MCU current consumption as per mentioned for fHCLK 16Mhz in the datasheet.

Anyone, please suggest to me what thing I need to set to achieve 0.88 mA current of CPU?

What are the steps I need to take care to achieve this or where I need to debug or which additional HAL API needs to config 0.88 mA current of CPU?

Your response will be highly appreciable to me

Sarra.S · ‎2023-01-20

Hello @BGajj.1 ,

Did you set all free pins as analog ? as it helps reducing the consumption

Please check this article

Hope that helps!

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BGajj.1 · ‎2023-01-20

Hello @Sarra.S,

Thanks for you response!

20 GPIO pins out of 144 pins I am not using. And yea I have keep those 20 pins as analog.

Is it okay to just keep those pins as analog or i need to disable the clock for those pins?

Piranha · ‎2023-01-20

Read at least the section 3 of this article:

https://community.st.com/s/question/0D53W00001bnh8dSAA/how-to-enter-standby-or-shutdown-mode-on-stm32