Posted on June 04, 2018 at 08:54 Hello,
If you are using any of ST boards (Nucleo, Discovery) there is always a dedicated jumper marked usually 'Idd' where you can connect your meter and measure current consumption.
There is as well quite nice dedicated board (
http://www.st.com/content/st_com/en/products/evaluation-tools/product-evaluation-tools/stm32-nucleo-expansion-boards/x-nucleo-lpm01a.html
) which allows you to measure current consumption and your application power profile.
#stop-mode
mode means that all high speed clocks are switched off. Only low speed external clock can be active (if RTC is configured), thus to measure the power consumption the best is to measure surrent consumption on Vdd line of the MCU (as Vdd and Vdda should be on the same level in most of STM32).
Please remember that STOP mode is not modifying your IO lines states, so to limit current consumption please perform any IO lines reconfiguration (the best is to use analog mode) to limit current consumption.
What I would like to recommend to you is to have a look at one of our free
#mooc
trainings where we are demonstrating each of low power modes (on STM32L4 example). You can see a bit more about this session
http://www.st.com/content/st_com/en/about/events/events.html/ultra-low-power-stm32-extras-mooc.html
.
The session is active on our learning portal
https://st-mooc.udemy.com/stm32l4_ws_mooc/
(requires free registration by posting
mailto:mooc.registration@st.com
).
Another option could be a lecture of one of our dedicated application notes (i.e. for
#stm32l4
lines we have
http://www.st.com/content/ccc/resource/technical/document/application_note/9e/9b/ca/a3/92/5d/44/ff/DM00148pdf/files/DM00148pdf/jcr:content/translations/en.DM00148pdf
or
http://www.st.com/content/ccc/resource/technical/document/application_note/5c/cb/90/97/4b/84/4e/81/DM002165pdf/files/DM002165pdf/jcr:content/translations/en.DM002165pdf
).
Hope it helps.
Best Regards,
Artur
