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I got MSP432 launchpad a week ago.
Studying MSP430 LaunchPad Workshop Course Workbook as my textbook. There was no problem whatsoever. But in lab 7(Energy trace) I've encountered a problem.
After flashing solution of lab_07b_lpm_timer project. I ran EnergyTrace. But EnergyTrace immediately stops and it says "Target current exceeded with the maximum current (75mA) supported by EnergyTrace."
So I actually measured current and voltage with my multimeters and the uc was drawing 170 mA. Even in the reset state.
No external circuitry has ever connected to my launchpad. Even no single jumper wire.
What could be a cause of this problem? ESD?
Planning to get another MSP432 LaunchPad and MSP432P401RIPZ(LQFP100) next week.
I will update this post after replacing MSP432 chip on this LaunchPad board.
Thanks to everyone who cared about my problem.
Replaced old MSP432 with the new one. It turns out that the MSP432 was the problem. After replacing, current consumption of the board drop to 1.5 uA, with debugger connected and all default jumpers connected. Very happy with it.
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In reply to Dennis Eichmann:
In reply to Seungwon Lee:
Do you measure the current by removing the 3.3V jumper and hooking your probes to it?
Did you double check if all other jumpers are in the correct position? For example the three LED jumpers? Maybe inserted 90 degrees to the normal position and shorting two outputs of the MSP?
Yes. I used that header pins for the measurement.
This is my measurement setup. lab_06c: Timer directly drives LED is running.
Left meter: measuring current in Amps range.
Right meter: measuring voltage of 3v3 rail.
No 90º jumpers.
FYI. surface temperature of the MSP432 chip was about 52 ℃ (126℉). delta T ≈ +29 ℃
In reply to Dung Dang:
I did experiments you said.
Not pictured but removing jumpers while running blink program did not affected to current readings. Just LED current fluctuations are gone. Still around 170 mA.
I imported LPM3 example to my workspace and flashed to MSP432. Example from "MSPWare: msp432p401_pcm_02 Enter LPM3 (ARM Deep Sleep Mode) with ACLK = REFO"Also every jumpers are removed.
Curiously entering LPM3 drew more current. it's 190 mA now.
While pressing reset button 170 mA.
Have you tried using an external power supply?? Please power the board thru J6.
Also please make sure that you movethe switch to Ext Debug and remove all the jumpers on the board especially these:
Do you still see the 190mA??
In reply to DavidL:
Powering with external power supply didn't make big difference. Current slightly increased but minor. (Running LPM3 MSPWare example)
Also while in reset state,
Current during reset state should be around 1 mA referring to device datasheet. Hmm...
In reply to Sebastian Stumpf:
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