CC2340R5-Q1: Stand by power policy in CC2340r5 low power SDK sample application , does not actually put the MCU in standby mode

ilanchezhian Thingalkodi

Part Number: CC2340R5-Q1
Other Parts Discussed in Thread: SYSCONFIG, CC2340R5

Hi,

We need the CC2340 BLE MCU in standby mode , it is mentioned in data sheet with DCDC on the standby mode current will be 0.71 uA and with GLDO enabled the standby mode current will be 1.1 uA.

But we are seeing with basic ble application provided in "simplelink_lowpower_f3_sdk_7_40_00_64" . in our evaluation board itself takes 0.1mA = 100 uA.

Further in the sysconfig setting , it is been observed that DCDC setting is enabled and power policy selected as standby policy. This put us to impression that CC2340 will go to standby mode when it is not advertising, it is not the case as i mentioned above it is taking around 100 uA when it is not advertising. What is that we need to do to put the MCU in standby mode ?

Regards

Ilan

over 1 year ago

0 Achyut Ray over 1 year ago

TI__Expert 3561 points

Greetings Ilan,

To assist you better, I would like to know how you are measuring the current consumption for the CC2340R5 chip? Is the debugger connected, with an active debug session? What are your advertising intervals? Are you using a TI Launchpad, and if so, are the leds turned on?

Thanks, and Best Regards,
Achyut Ray

0 Clément over 1 year ago in reply to Achyut Ray

TI__Guru** 101460 points

Hi Ilan,

Thank you for reaching out.

The power measurement you are showing seems to be for a device advertising Bluetooth LE packet every ~100 ms (marked in red). This is why, the power consumption obtained is higher than the stand-by power consumption.

For information, in between the advertisements, the device should go to standby (blue-marked).

For power optimizations, please review the following: https://software-dl.ti.com/simplelink/esd/simplelink_lowpower_f3_sdk/7.40.00.64/exports/docs/ble5stack/ble_user_guide/html/ble-stack-5.x/optimization-power-cc23xx.html

I hope this will help,

Best regards,

Bluetooth®︎

Bluetooth forum

CC2340R5-Q1: Stand by power policy in CC2340r5 low power SDK sample application , does not actually put the MCU in standby mode