• State Verified Answer
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 4 subscribers
  • Views 177 views
  • Users 0 members are here
Options
Related

DA14531MOD deep_sleep power consumption

chs

Hi, I am trying to put the DA14531MOD into clocked deep_sleep mode with wakeup on P0-8 as follows:

#define BTN1_PORT GPIO_PORT_0
#define BTN1_PIN GPIO_PIN_8

    spi_flash_power_down();
    GPIO_ConfigurePin(BTN1_PORT, BTN1_PIN, INPUT_PULLDOWN, PID_GPIO, false);
    wkupct_enable_irq(WKUPCT_PIN_SELECT(BTN1_PORT, BTN1_PIN), WKUPCT_PIN_POLARITY(BTN1_PORT, BTN1_PIN, 0), 1, 5);
    arch_set_deep_sleep(PD_SYS_DOWN_RAM_OFF, PD_SYS_DOWN_RAM_OFF, PD_SYS_DOWN_RAM_OFF, true);

The power consumption does drop but not as much as I'd expect. Am I doing it right? Is there anything else I should do to ensure that the power consumption is as low as possible?

I am using DA14531_SDK_6.0.18.1182.1

  • 0

    Hi There,

    Thank you for posting your question online.
    What are the measurements you are getting for Deep Sleep on the DA14531MOD?
    I worked on the prox_reporter example, I set the P0_8 as my Button on the wake-up controller and then I followed the guide here:
    6. Deep Sleep configuration — DA145XX Tutorial Sleep Modes (renesas.com)
    I was able to measure the current like this:

    And I saw a current consumption of 1μA which is expected:


    Kind Regards,
    OV_Renesas

  • 0 in reply to OV_Renesas

    A Nordic PPK2 is used to measure the current - this is a custom board with other components on it (a microcontroller, a battery charging circuit and other things) which all use power so getting an exact measurement for the DA14531MOD power usage is tricky.

    But I just discovered that if I change the last parameter to arch_set_deep_sleep (pad latch enable) from true to false the power consumption is much improved. Previously, the board was using 1.05mA, this has dropped down to 0.055mA - a 20x improvement!

    I am sure that the majority of the remaining power consumption is caused by the other components on the board.

    So - is it OK to set pad_latch_enable to false when using a GPIO to wake from deep_sleep?

    Thanks for your help,
    Charlie.

  • 0 in reply to chs

    Ah, my apologies, I see from the link that this is the correct way to do it.

  • +1 in reply to chs

    Hi Charlie,

    Thank you for the reply. 
    Glad you were able to improve your current consumption.
    Yes, by default the arch_set_deep_sleep should be set to false to get better results. 
    When you call arch_set_deep_sleep  with pad latch set to true, you keep the pads enabled or retained until you wake-up. This is what raises the power consumption.

    Kind Regards,
    OV_Renesas