LAUNCHXL-CC2640R2: How to minimize shutdown current using pinShutdown example

leo lau

Part Number: LAUNCHXL-CC2640R2
Other Parts Discussed in Thread: ENERGYTRACE, CC2640R2F

Hi,

I would like to minimize current consumption by implementing pinShutdown example into simpleCentral example. In the datasheet stated that device draws <10 uA after entering shutdown mode.

However, when I trying to run the example and observe what is the current consumption, it seems like it is not the case at all.

I have tried powering the device using power supply with 3.3V/100mA and disconnecting TMS & TCK jumper. I have also tried closing the LED and button pin using PIN_close function before Power_shutdown.

But the best result I can achieve is only about 1.5mA.

1. Can the pinShutdown example without modification achieve < 10uA? If not, what modifications are needed to achieve this?

2. Can CC2640R2 support shutdownTime in function Power_shutdown? If not, can I do the similar using clock function?

over 3 years ago

0 Clément over 3 years ago

TI__Guru** 101540 points

Hi,

Thank you for reaching out. Make sure you review https://www.ti.com/lit/swra478.

In addition to that, I would recommend to use EnergyTrace to have an image of the current consumption: https://dev.ti.com/tirex/content/simplelink_cc13xx_cc26xx_sdk_6_30_00_84/docs/ble5stack/ble_user_guide/html/energy-trace/energy-trace.html#using-energytrace-with-an-external-target

Last but not least, I would recommend to first ensure you achieve the expected power consumption when taking the pinShutdown example alone.

I hope this will help,

Best regards,

0 Markel Robregado over 3 years ago

Guru 86865 points

Hi,

Shutdown mode according to CC2640R2F datasheet is 0.1 uA. I have achieved shutdown mode 0.1 uA using simple peripheral. What would add to that shutdown current is open UART, external peripherals like sensors, LED. At the pin shutdown example program the LED turned on would add to current consumption.

-kel

Bluetooth®︎

Bluetooth forum

LAUNCHXL-CC2640R2: How to minimize shutdown current using pinShutdown example