Power profiler current measuring

RE: Power profiler current measuring

antoine98 — Tue, 16 Jul 2024 13:54:51 GMT

Thanks for the help

RE: Power profiler current measuring

Vidar Berg — Tue, 16 Jul 2024 13:52:59 GMT

Yes, the chip will be powered when you short the connection through the ampere meter.

RE: Power profiler current measuring

antoine98 — Tue, 16 Jul 2024 12:21:07 GMT

So, if I cut the SB9 solder and I connect the board to my PC while ppk2 is in ampere meter mode. Would I be able to execute my application in Segger and see how much this is consuming through power profiler app?

RE: Power profiler current measuring

Vidar Berg — Tue, 16 Jul 2024 12:06:11 GMT

The chip will not receive power after you've cut the connection. You can either re-solder the SB or place a jumper on the header. I recommend the latter as it makes it easy to change the board configuration between current measurement and normal operation.

RE: Power profiler current measuring

antoine98 — Tue, 16 Jul 2024 11:20:29 GMT

I don't know if I exactly get the guide (I'm sorry to bother you, I'm a beginner).

So, if i want to test how much current does my application consume through ppk2 using amperemtere mode, I just need to cut SB9, right?

While SB9 has been cut would I'm be able to connect my board to USB and debug my application as I did before?

What does it means that to restore normal DK function should i need to solder SB9? Which are the functions that i couldn't perform while this is cut?

Thanks again for the answers

RE: Power profiler current measuring

Vidar Berg — Mon, 15 Jul 2024 11:13:55 GMT

Looks to me from the picture that the solder bridge has not been cut.

Preparing a DK for current measurement

RE: Power profiler current measuring

Turbo J — Sat, 13 Jul 2024 13:24:41 GMT

The picture looks like the SB next to the current connector still conducting, thus you cannot measure any current.

Your results are consistent with a 0A hypothesis - just a lot of measurement noise.

Put the target MCU in reset (pulling reset low) or in debug mode, this will consume at least a few hundred µA current (up to a few mA).