CC1352P: CC1352P eval kit power consumption with ble5 project

Isak Levinson

Part Number: CC1352P
Other Parts Discussed in Thread: ENERGYTRACE, CC1352R, CC1312R

Hi,

I'm using the CC1352P-2 development kit.

Tried measuring the consumption current while running ble5_simple_peripheral_cc13x2p2lp_app and dmm_wsnnode_remote_display_app_CC1352P_2_LAUNCHXL_tirtos_ccs projects.

In both cases I've disabled the advertise, and also the WSN transmissions.

I'm taking the measurements with a continuous current metwe, with 1mS sample rate.

In both cases the average current is a bit more than 80uA, while the minimum current floor is about 80uA.

In this case I'd expect the current to be around 1uA.

Is there any reason for this high current? Maybe it's the on board FLASH device that should be put into deep sleep?

Is there any other options to add to the project, except the POWER_SAVING ?

Is there anything else that should be done in the project to reduce current?

Thanks, Isak.

over 6 years ago

0 J Lindh over 6 years ago

TI__Guru 57865 points

Hi,
There should not be any specific SW settings in your case. How did you perform the measurement? Did you review www.ti.com/.../swra478c.pdf, specifically on how to set the jumpers correctly.

0 Isak Levinson over 6 years ago in reply to J Lindh

Intellectual 790 points

Yes, I've read the mentioned document.
To make the measurement, I removed all the interconnecting jumpers between the debugger side and the CC13152P. Then connected the power supply with the current meter to the GND and 3.3V (near the SMA connector).
The XDS110 jumper set to the USB side on the board.

0 Marie H over 6 years ago in reply to Isak Levinson

TI__Guru* 81461 points

Hi Isak,

Can you take a measurement with the EnergyTrace on the CC1352P2-LAUNCHXL and post it? It's described in the previously mentioned app note (http://www.ti.com/lit/swra478).

0 Marie H over 6 years ago in reply to Marie H

TI__Guru* 81461 points

BTW what revision of the CC1352P2 LaunchPad do you have? (See the sticker on the bottom of the launchpad for this information.)

0 Isak Levinson over 6 years ago in reply to Marie H

Intellectual 790 points

Hi Marie,

Here are the energy traces.

It's from the DMM project, where both the TX and the BLE advertisements are disabled.

It's also about the same results I got from the ble5_simple_peripheral_cc13x2p2lp_app asfter disabling the advertisments.

The board version is:

HW: Rev: A

FW: SDK2.10

1825

Thanks, Isak.

0 Marie H over 6 years ago in reply to Isak Levinson

TI__Guru* 81461 points

Hi Isak,

I'm afraid this is expected on the CC1352P-2 Rev A LaunchPads. I would advise you to wait for the next revision LaunchPads, alternatively use an external power supply unit (PSU).

If you want to use external power, remove all the jumpers on the board except 3V3 and TDX. Supply 3.3 V on the middle jumper of the three power selector jumper. In this case you have to wait to start the XDS to after you have connected the 3.3. V.

0 Isak Levinson over 6 years ago in reply to Marie H

Intellectual 790 points

So this a a problem of the LaunchPad, right?

Actually I did try to use an external PSU, and got the same results.

I removed ALL the interconnecting jumpers, and connected the PSU to the 3.3V near the SMA connector. That way the CC1352 is totally isolated from the XDS, right?

Is there a reason you recommended to leave the TDX and the 3.3V?

Wouldn't the XDS draw current from the CC1352?

Thanks, Isak.

0 Marie H over 6 years ago in reply to Isak Levinson

TI__Guru* 81461 points

Hi Isak,

In order to use the energy trace you will have to leave the 3V3 and TDX jumpers.

0 Isak Levinson over 6 years ago in reply to Marie H

Intellectual 790 points

Yes,

But I used an external PSU and current meter.

And I got about 500uA average current on the external current meter, while all the jumpers are disconnected.

0 Marie H over 6 years ago in reply to Isak Levinson

TI__Guru* 81461 points

Hi Isak,

For debugging puposes, can you set the device in standby and measure the current? (No advertising or other DMM activity.)

0 Isak Levinson over 6 years ago in reply to Marie H

Intellectual 790 points

Hi,

That's exactly what I did. The Energy-Trace screenshots at my previous post are without advertising and without any RF activity. Just standby.

Also got about the same results using an external PSU and current meter, and all jumpers removed.

0 Fredrik K over 6 years ago in reply to Isak Levinson

TI__Guru** 106705 points

Hi Isak,

There is an issue with the Energy Trace circuitry on the LaunchPad you currently have. This will be fixed on the next revision scheduled to be released later this year. Note that the CC1312R/CC1352R/CC26x2R LaunchPads are already available with updated ET circuitry.

For accurate current measurements, follow the guidelines in www.ti.com/lit/pdf/swra478 .

If you power the board from external power for current measurement purposes you should also remove the 3V3 jumper. The UART Rx jumper may be needed to ensure there is a proper external pull-down on the signal.

Try also using the pinStandby SW example to ensure the SW configuration is correct.

Regards,
Fredrik

0 Isak Levinson over 6 years ago in reply to Fredrik K

Intellectual 790 points

Hi,

I tried the pinStandby demo, and it also gives about 500uA average current, both with EnergyTrace and with an external PSU.

For external PSU, I disconnected all jumpers, and then tried with and without the TX (and GND) connected, and the result is the same.

Thanks, Isak.

0 Marie H over 6 years ago in reply to Isak Levinson

TI__Guru* 81461 points

Hi Isak,

The UART Rx jumper may be needed to ensure there is a proper external pull-down on the signal. Can you try with this configuration?

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CC1352P: CC1352P eval kit power consumption with ble5 project