CC2340R5: All my TI based boards consume different current in Low Power Condition

Hello Vinayak Bhatiya,

I will put together an example tomorrow to make a LaunchPad go into low power, and we can adapt that to the PCB to see if it also goes into low power.

Did you already get your PCB design reviewed by TI? 

Thanks,
Alex F

Hello Alex,

Thanks for response

I did not give Designs to TI for review.

Hello Vinayak Bhatiya,

Here is a code snippet which allows the LaunchPad to reach low power, start with the empty example from the SDK as a baseline. 

/* For usleep() */
#include <unistd.h>
#include <stdint.h>
#include <stddef.h>

/* Driver Header files */
#include <ti/drivers/GPIO.h>
// #include <ti/drivers/I2C.h>
// #include <ti/drivers/SPI.h>
// #include <ti/drivers/Watchdog.h>

/* Driver configuration */
#include "ti_drivers_config.h"

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    /* 1 second delay */
    uint32_t time = 3;

    /* Call driver init functions */
    GPIO_init();
    // I2C_init();
    // SPI_init();
    // Watchdog_init();

    /* Configure the LED pin */
    GPIO_setConfig(CONFIG_GPIO_LED_0, GPIO_CFG_OUT_STD | GPIO_CFG_OUT_LOW);

    /* Turn on user LED */
    GPIO_write(CONFIG_GPIO_LED_0, CONFIG_GPIO_LED_OFF);

    while (1)
    {
        sleep(time);
        //GPIO_toggle(CONFIG_GPIO_LED_0);
    }
}

I was able to read ~0.7 uA with EnergyTrace here.

Submit your PCB design for review at, SIMPLELINK-2-4GHZ-DESIGN-REVIEWS Design tool | TI.com.

Thank you,
Alex F

Hello Alex Fager

Thanks for response

I tried these codes but all the boards have different behavior in terms of current consumption which I mentioned below.

Board 1 Sleep Current - 156.36uA
Board 2 Sleep Current - 171.64uA
Board 3 Sleep Current - 650.80uA

So would you suggest any other codes or information?

I applied a schematic review to the TI. 

Hello Vinayak Bhatiya, 

When you tested the code did you only connect the 3.3 v and Ground connections? 

Can you detail the peripherals you have running here if any?

Vinayak Bhatiya said:

I applied a schematic review to the TI. 

-good to hear! 

Thanks,
Alex F

Hello Alex Fager,

No, I connect my peripherals, my board is working on 3V supply.

I connect the temperature sensor, NFC, RTC, Motor Driver, Buzzer, and LED.

I have one more question for the Design Review we need an NDA certificate so how do we apply that from TI?

Hello Vinayak Bhatiya,

For the NDA please reach out to your assigned TSR or FAE to get this process started. 

Vinayak Bhatiya said:

I connect the temperature sensor, NFC, RTC, Motor Driver, Buzzer, and LED.

-There is a possibility here that the increased power is due to these peripherals, in my own testing I directly removed the jumpers to the LEDs so there is no power to them, I am not too sure here what you could do to stop power from going to these peripherals though. 

Thanks,
Alex F