MSPM0L1304: Higher than expected current consumption

Sebastian D' Alessandro

Part Number: MSPM0L1304

Tool/software:

Hi,

I have a design with the MSPM0L1304 MCU that when put on standby mode it consumes 20 uA which seems higher than expected current for this mode.

I checked the following:

I set all GPIOs outputs as low, used and unused ones.
I left ADC and configure power enable into automatic mode
I remove all timers for testing

The configuration is as shown in the following images:

I'm using the following code for testing:

int main(void)
{
    SYSCFG_DL_init();
    BOARD_LED_Power_Off();
    BOARD_LED_Open_Off();
    BOARD_LED_Close_Off();
    BUZZER_turn_off();
    
    DL_SYSCTL_setPowerPolicySTANDBY1();
    
    BOARD_Boost_Enable(false);
    DL_GPIO_clearPins(MOTOR_PORT, MOTOR_DIR_1_PIN);
    DL_GPIO_clearPins(MOTOR_PORT, MOTOR_DIR_2_PIN);
    DL_GPIO_clearPins(MOTOR_PORT, MOTOR_SLEEP_PIN);
    DL_GPIO_clearPins(BOOST_PORT, BOOST_BOOST_EN_PIN);
    DL_VREF_disablePower(VREF);
    DL_GPIO_disablePower(GPIOA);
    
    DL_ADC12_disablePower(ADC0);
    DL_SYSTICK_disable();

  /* Main Loop */
  while (1) 
  {
    __WFI();
  }
}

What could I be missing to lower the MCU consumption?

Thank you!!

Regards,

Sebastian

over 1 year ago

0 Dennis Lehman over 1 year ago

TI__Guru 71216 points

Hi Sebastian,

Are you using the MSPM0L Launchpad or your own PCB?

Let's see if we can first rule out any leakage paths on your platform. Try the following code. In DL_SYS_INIT only configure your IO's. No timer, no ADC, no VREF.

This should result in about 4uA.

int main(void)
{
    SYSCFG_DL_init();

    DL_SYSCTL_enableSleepOnExit();

    while (1) {
        __WFI();
    }
}

Let me know what you discover.

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MSPM0L1304: Higher than expected current consumption