CODEWITHSUNDEEP
stm32nucleo
user9564464
user9564464

Reputation: 313

Current consumption of the uC on a STM32 Nucleo-64 evaluation board

I want to measure the current consumption of the uC on my STM32 Nucleo-64 evaluation board (NUCLEO-L073RZ). The manual says, that I just have to remove the JP6/IDD jumper and then connect the pins to an ammeter: enter image description here

But if I just remove the JP6 jumper (no pin connection), the uC is still running (I can still debug/communicate via I2C). I would have expected, that if the JP6 is removed, the uC is no longer powered and therefore not accessible anymore...

Can somebody please explain me, where is my error in reasoning?

Here is the link to the corresponding STM32 Nucleo-64 manual (page 23):

Upvotes: 0

Views: 1790

Answers (2)

user9564464
user9564464

Reputation: 313

I found the reason: the problem was my fuse in the multimeter was broken and the irritating LED on the Nucleo is always ON (independently of the MCU is running or not)...

Upvotes: 0

Richard at ImageCraft
Richard at ImageCraft

Reputation: 665

Connecting the USB to the debug port IS powering the MCU through the debug pod. Try removing the 2 ST-LINK jumpers on upper left an inch from the the USB connector. That disconnects the built-in ST-LINK from the MCU. That might remove the power from the debug pod to the MCU.

Upvotes: 1

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