CC2650MODA: simplePeripheral: What are the conditions to enter standby mode?

Jim Tompkins

Part Number: CC2650MODA
Other Parts Discussed in Thread: ENERGYTRACE, LAUNCHXL-CC26X2R1

I have customized the simplePerphieral application. I used LaunchXL-CC26X2R1 with EnergyTrace to monitor power consumption. I only see the current going down to about 200uA, not the 1uA standby as I expected. I have a SensorController task that drives two LEDs. The termination code in the task I do two gpioClearOutputs. Is this enough to make the disable the sensor controller to allow standby to be entered? Are there other things that could be preventing me from going into standby? I am advertising on BLE. Does this prevent standby in the advertising interval?

I have POWER_SAVING defined as a pre-defined symbol.

Can you please point me to some documentation on the power schemes, etc.?

Thanks!

over 2 years ago

0 FI over 2 years ago

TI__Mastermind 20580 points

Hi,

Please see thread

https://e2e.ti.com/support/wireless-connectivity/bluetooth-group/bluetooth/f/bluetooth-forum/622135/cc2650moda-is-the-current-consumption-of-the-cc2650moda-in-standby-mode-higher-than-sensortag-cc2650-in-standby-mode

Regards,

0 Ryan Brown1 over 2 years ago

TI__Guru**** 207157 points

Hello Jim,

Here are some more resources:

https://dev.ti.com/tirex/explore/node?node=ALkviW9mUXQ8nqadjFp.sQ__krol.2c__LATEST
https://dev.ti.com/tirex/explore/node?node=AAt3spsP7Z2lUqEh1pignQ__FUz-xrs__LATEST
https://www.ti.com/lit/swra347
https://www.ti.com/lit/swra478

Unfortunately, the CC13X0 / CC26X0 Sensor Controller only supports Active and Standby modes, not Low Power like with the CC13X2 / CC26X2. You can disable the Sensor Controller during your tests to confirm whether this really is causing the higher power consumption results.

Regards,
Ryan

0 Jim Tompkins over 2 years ago in reply to FI

Intellectual 350 points

In my application, I only use these 4 I/O: 2 GPIO to drive LEDS, I2C SDA and SCL. I have all of these working with SensorController code and my application calling the scif functions. Do I even need to call PIN_init(BoardGpioInitTable) in the application code? It seems to use a BoardGpioInitTable defined in BOOSTXL_CC2650MA.c to be:

const PIN_Config BoardGpioInitTable[] = {
    Board_RLED   | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX,         /* LED initially off             */
    Board_GLED   | PIN_GPIO_OUTPUT_EN | PIN_GPIO_LOW | PIN_PUSHPULL | PIN_DRVSTR_MAX,         /* LED initially off             */
    Board_UART_RX | PIN_INPUT_EN | PIN_PULLDOWN,                                              /* UART RX  */
    Board_UART_TX | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL,                        /* UART TX */
   Board_SRDY | PIN_GPIO_OUTPUT_EN | PIN_GPIO_HIGH | PIN_PUSHPULL,                           /* SRDY */
   Board_MRDY | PIN_INPUT_EN | PIN_PULLDOWN,                                                 /* MRDY */
    PIN_TERMINATE
};

I don't use the UART and don't know what SRDY or MRDY are for. I tried deleting the call to PIN_init and the application still runs but the power dissipation is not reduced. I'm still getting 200uA during the lowest power dissipation times:

I have both LEDs off i.e. outputs low and the I2C inactive. Do I have to somehow put the SensorController into standby or will the OS do this? I call scifStartRtcTicksNow(0x00010000 / 400); at initialization time; do I need to stop RTC ticks to be able to go into standby?

Thanks for any suggestions.

0 Jim Tompkins over 2 years ago in reply to Ryan Brown1

Intellectual 350 points

Thanks, I will consult these links and try disabling the SCIF and measuring the power dissipation.

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CC2650MODA: simplePeripheral: What are the conditions to enter standby mode?