CCS/LAUNCHXL-CC1310: Can MSP-Fet or XDS110 on CC1352P be used to measure power consumption of CC1310-Launchpad?

Zhiyong Li (FT)

Part Number: LAUNCHXL-CC1310
Other Parts Discussed in Thread: MSP-FET, CC1310, CC1352P

Tool/software: Code Composer Studio

Hi,

I am getting some weird results when measuring power consumption of CC1310-Launchpad. After downloading the pinShutdown example into CC1310-launchpad, I connected GND and VCC of MSP-Fet to GND and 3V3 on CC1310-launchpad, and I connected jumper P10 to external power supply.

The following is what I get. After pressing left button/right button, even when CC1310 is supposed to be in shut down mode, I still see ~4mA current draw, while CC1310 draws ~10mA after waking up.

I got similar results with XDS110 with ET-HDR on CC1352P launchpad, there is always a 4mA baseline current draw not sure where from.

So my question is, did I do something wrong or we are not supposed to use such setup to measure CC1310-launchpad power consumption?

Thanks.

over 5 years ago

0 TER over 5 years ago

TI__Guru**** 317180 points

Have you done a measurement with a multi meter to check your power consumption? If you still see the 4 mA baseline, please post a picture of your setup.

0 Zhiyong Li (FT) over 5 years ago in reply to TER

Expert 2920 points

I don't have the actual boards with me right now but the following diagram should work for illustration purpose.

I suspect 4mA went into XDS110 on CC1310 launchpad.

0 TER over 5 years ago in reply to Zhiyong Li (FT)

TI__Guru**** 317180 points

I would advice to look at the CC1310 Launchpad schematic. Having the jumper between pin 2 and 3 power the level shifters from the external power supply, in this case the MSP-FET. Keep it in the default position between pin 1 and 2 or remove it.

0 Zhiyong Li (FT) over 5 years ago in reply to TER

Expert 2920 points

I thought external pwr means power for CC1310 will be supplied from 3V3 pin. After removing that jumper, current draw measurement seems to be as expected now. Thanks.

0 TER over 5 years ago in reply to Zhiyong Li (FT)

TI__Guru**** 317180 points

"I thought external pwr means power for CC1310 will be supplied from 3V3 pin": Yes, IF you want to use the XDS110. Typical use case is if you have a custom board that is running on a VDDS different from 3.3 V and you want to debug using the XDS110. Then you have to have the correct voltage on the level shifters.

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CCS/LAUNCHXL-CC1310: Can MSP-Fet or XDS110 on CC1352P be used to measure power consumption of CC1310-Launchpad?