sd_power_system_off() for power consumption | SDK 15.2

Hai team,

In my application , I am using nrf52832 , application took 26 microamps in runtime [peripheral - I2c] ,acclerometer and ble advertisements],here i need to put my device in sleep mode ,for that using below api

sd_power_system_off();

here it tooks 23 microamps , before calling sd_power_system_off() uninitializing i2c , app_timer and gpiote calls,
is that neccasary to disable all interupts and tasks before going to sleep??if so is there any command to disable all interupts pending tasks in single short?
Is above flow is correct to put the device in sleep ? but current has not reduced that much
what could be the cause here ? And may I know the current consumption in sleep mode using sd_power_system_off().

Thanks in advance!

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0 user4240 over 4 years ago

Hi,

There are generally 2 things you need to make sure of before entering System OFF mode: 1. That there are no ongoing DMA transactions. In your case, that probably means stopping the ble advertisements and not using the i2c. 2. Re-configure IOs if needed (GPIO configurations are retained in system off). Pins that are not needed for wakeup,etc should have the default configuration (nrf_gpio_cfg_default).

Best regards,

Vidar
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0 user4240 over 4 years ago

Hi,

There are generally 2 things you need to make sure of before entering System OFF mode: 1. That there are no ongoing DMA transactions. In your case, that probably means stopping the ble advertisements and not using the i2c. 2. Re-configure IOs if needed (GPIO configurations are retained in system off). Pins that are not needed for wakeup,etc should have the default configuration (nrf_gpio_cfg_default).

Best regards,

Vidar
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