LP-XDS110: Would like to measure the power consumption using LP-XDS110 and TMDSEMU110-ETH

Shunsuke Yamamoto

Part Number: LP-XDS110
Other Parts Discussed in Thread: TMDSEMU110-ETH, , ENERGYTRACE, , TMDSEMU110-U, LP-EM-CC2340R5

Hi team,

Is it possible to connect LP-XDS110 and TMDSEMU110-ETH to measure the power consumption using EnergyTrace?

Best regards,

Shunsuke Yamamoto

7 months ago

0 Arthur R☑️ 7 months ago

TI__Mastermind 18197 points

Hi Shunsuke,

I am not certain I understand what you are trying to achieve.

Are you trying to measure the consumption of a LP-XDS110 using the TMDSEMU110-ETH?

Or are you wondering if the LP-XDS110 (not the LP-XDS110ET) can use EnergyTrace? In which case the answer is no.

Regards,

Arthur

0 Shunsuke Yamamoto 7 months ago in reply to Arthur R☑️

TI__Expert 4926 points

Hi Arthur,

Thank you for the reply. My customer has been developing their original board, and try to measure the power consumption of it using TMDSEMU110-ETH and LP-XDS110. My customer wonders the connection of TMDSEMU110-ETH and LP-XDS110 are possible because the recommended connection is TMDSEMU110-U and TMDSEMU110-ETH, not LP-XDS110 and TMDSEMU110-ETH.

However, I didn't notice LP-XDS110 doesn't support EnergyTrace. Thank you for letting me know LP-XDS110ET can support EnergyTrace function. It looks like the connection of LP-XDS110ET and TMDSEMU110ETH is possible to use EnergyTrace function. Is this my understanding correct?

Best regards,

Shunsuke Yamamoto

0 Arthur R☑️ 7 months ago in reply to Shunsuke Yamamoto

TI__Mastermind 18197 points

Hi Shunsuke,

The LP-XDS110ET does not need the TMDSEMU110ETH in order to use EnergyTrace, as it already comes with the correct circuitry.

The customer thus can choose to either use the LP-XDS110ET, or the other programming programming probe, but not the two at the same time.

Regards,

Arthur

0 Shunsuke Yamamoto 7 months ago in reply to Arthur R☑️

TI__Expert 4926 points

Hi Arthur-san,

Thank you for the reply. I come up with the question again. LP-XDS110ET can support 1.8V power supply?

Best regards,

Shunsuke Yamamoto

0 Arthur R☑️ 7 months ago in reply to Shunsuke Yamamoto

TI__Mastermind 18197 points

Hi Shunsuke,

Yes, the LP-XDS110ET comes with level shifters, that allow you to power the device and program it from an external 1.8V power supply.

More information on that feature here: https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/1193444/cc2642r-3-3v-energytrace-with-1-8v-i-o

and here: https://dev.ti.com/tirex/explore/node?a=&node=A__AOhWCvEMSJlyxXbKsikrYw__cc26xx_devtools__FUz-xrs__LATEST

Regards,

Arthur

0 Shunsuke Yamamoto 6 months ago in reply to Arthur R☑️

TI__Expert 4926 points

Hi Arthur-san,

Thank you for the reply. We can see below sentences. It seems like LP-XDS110ET doesn't support 3.3V supply voltage. What do you thnik?

"To use EnergyTrace, the XDS110 Debug Probe must provide power to the LP-EM-CC2340R5 to perform current measurements. EnergyTrace embedded in the LP-XDS110ET or in a separate Launchpad only supports 3.3 V supply voltage."

Best regards,

Shunsuke Yamamoto

0 Arthur R☑️ 6 months ago in reply to Shunsuke Yamamoto

TI__Mastermind 18197 points

Hi Shunsuke,

The XDS110 supports 3.3V supply voltage, as it is indeed supplying 3.3V.

The quote you have posted merely states that for EnergyTrace to work, the microcontroller has to be supplied with the 3.3V coming from the XDS110.

Regards,

Arthur

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LP-XDS110: Would like to measure the power consumption using LP-XDS110 and TMDSEMU110-ETH