nrf5340 sleep currrent consumption

RE: nrf5340 sleep currrent consumption

Priyanka — Tue, 28 Jan 2025 08:49:04 GMT

Hi Lavanys,

[quote user="Lavanya_Manohar"]When we have flash a simple sample(with counter+LED) in our custom board, board consume overall 28-33uA. [/quote]

This sounds reasonable and is expected.

[quote user="Lavanya_Manohar"]When we add wifi+Task+interrupt+ble+i2c related code to the same code the overall board current goes upto 60-70uA[/quote]

But this jump is quite drastic. So issue could be with the ble, wifi, tasks or interrupts. Maybe you can try to add the BLE, tasks, interrupts one by one and check which is the main contributor of the current.

Also, you could maybe try to check the consumption by analysing them one by one.

For eg., make sure your WiFi chip is powered down when in system off mode.

Make sure the i2c peripherals are disabled properly during the System OFF mode.

-Priyanka

RE: nrf5340 sleep currrent consumption

Lavanya_Manohar — Tue, 07 Jan 2025 08:19:38 GMT

Hi,

[quote userid="108933" url="~/f/nordic-q-a/112208/nrf5340-sleep-currrent-consumption/517071"]What is the base-current consumption of your board when everything is in sleep mode? [/quote]

When we have flash a simple sample(with counter+LED) in our custom board, board consume overall 28-33uA.

When we add wifi+Task+interrupt+ble+i2c related code to the same code the overall board current goes upto 60-70uA

[quote userid="108933" url="~/f/nordic-q-a/112208/nrf5340-sleep-currrent-consumption/517071"]You have flash and i2c on your board. So, there must be some added current from other parts of your custom board.[/quote]

Could you please shrae the detail of how much it consume(current measurement) when we add peripherals? So that we can conclude the PM of our board.

RE: nrf5340 sleep currrent consumption

Kazi Afroza Sultana — Mon, 06 Jan 2025 16:01:52 GMT

Hello,

What is the base-current consumption of your board when everything is in sleep mode?

You have flash and i2c on your board. So, there must be some added current from other parts of your custom board.

RE: nrf5340 sleep currrent consumption

Lavanya_Manohar — Fri, 20 Dec 2024 12:31:19 GMT

Hi,
Thank you for your response.

Yes, In our application we using 5 GPIO interrupt, Where 4 pin are PULL UP and 1 pin is pull down in hardware side.
In software wise, we using port rather than GPIOTE to save current.

Here I share the software configuration of the pins in overaly FYR Please reviwe provide your feedback.

&gpio0 {

status = "okay";

/* Use PORT event rather than GPIOTE IN event, to save power */

sense-edge-mask = <0xffffffff>;

};

&gpio1 {

status = "okay";

/* Use PORT event rather than GPIOTE IN event, to save power */

sense-edge-mask = <0xffffffff>;

};

RE: nrf5340 sleep currrent consumption

Kazi Afroza Sultana — Thu, 19 Dec 2024 14:38:35 GMT

Hello,

My colleague Priyanka is on leave now. It's holiday season here in Norway. Sorry for the late reply.

I suspect that GPIOTE IN is used for interrupts on your setup, then this will cause higher sleep current. Could you please check this?

RE: nrf5340 sleep currrent consumption

Lavanya_Manohar — Fri, 13 Dec 2024 04:49:33 GMT

Hi Priyanka,

Any update on previuous command?

RE: nrf5340 sleep currrent consumption

Lavanya_Manohar — Tue, 10 Dec 2024 06:16:17 GMT

Hi Priyanka,
Thank you for you response.

[quote userid="107729" url="~/f/nordic-q-a/112208/nrf5340-sleep-currrent-consumption/512246"]Are you using the COEX related pins? If you are not using them, then it's better to configure them as disconnected inputs in the dts or explicitly set as inputs with no pull resistors in your application.[/quote]

We are using both BLE and Wifi, so COEX is needed right?

nrf_radio_coex: nrf7002-coex {

status = "okay";

compatible = "nordic,nrf700x-coex";

req-gpios = <&gpio0 28 GPIO_ACTIVE_HIGH>;

status0-gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>;

grant-gpios = <&gpio0 24 (GPIO_PULL_DOWN | GPIO_ACTIVE_LOW)>;

swctrl1-gpios = <&gpio0 29 GPIO_ACTIVE_HIGH>;

btrf-switch-gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;

We };

Above coex configuration is in zephyr.dts file

[quote userid="107729" url="~/f/nordic-q-a/112208/nrf5340-sleep-currrent-consumption/512246"]make sure that the external flash is in a deep sleep mode.[/quote]We put external flash in suspend mode.

pm_device_action_run(spi_flash_dev, PM_DEVICE_ACTION_SUSPEND)

Could you please suggest how can we acheive the deep sleep mode?

RE: nrf5340 sleep currrent consumption

Priyanka — Wed, 27 Nov 2024 02:40:34 GMT

Hi,

Are you using the COEX related pins? If you are not using them, then it's better to configure them as disconnected inputs in the dts or explicitly set as inputs with no pull resistors in your application.

Make sure there are no floating pins. Also make sure that the external flash is in a deep sleep mode. Also make sure that the IOVDD is not connected to any unused GPIO pins. Try to set all unused GPIO pins to disabled and try not to leave them floating.

If you still have current issues, maybe you could try to isolate the current readings on 5340 and 7002 to see which causes the extra leakage. You can also to check the current measurements on each CO-EX related pins to see which has a spike.

-Priyanka

RE: nrf5340 sleep currrent consumption

Lavanya_Manohar — Sat, 23 Nov 2024 12:03:30 GMT

Hi Priyanka,
Thank you for your support.

Somehow we manage and reduced the current measurement in our board. Below are the current consumption measurements and challenges we are facing:

Current Consumption:
- nRF5340: ~30 µA in sleep mode.
- nRF7002: ~2 µA in idle mode (shut down during sleep).
- We are working on further reducing the nRF5340's current consumption.
Application Details:
1. Wi-Fi module is set to idle and shut down during sleep.
2. Console/UART is suspended before entering idle mode.
3. SPI/external flash is suspended before entering idle mode.
4. I2C is suspended before entering idle mode.
5. A Counter Timer is used for periodic wakeups.
Issue:
The nRF5340 sleep current documentation indicates consumption as low as ~5 µA in many scenarios. However, we are seeing 30 µA, which seems higher than expected.
Could you please clarify this?
Debugging Observations:
We measured voltage on various pins during sleep and observed:
- COEX-related pins, IOVDD, HOST IRQ, and QSPI pins show voltages ranging from 1V to 3.3V.

Could this be causing the higher current consumption? If so, what steps can we take to mitigate this?

Request for Suggestions:
We would need your guidance on:
1. Understanding the expected sleep current for nRF5340 in this scenario.
2. Eliminating potential issues related to COEX and other pin voltages.
3. Any additional steps to optimize current consumption further.

RE: nrf5340 sleep currrent consumption

Priyanka — Thu, 20 Jun 2024 12:26:51 GMT

Hi Lavanya,

Here are a few of my suggestions:
PLease check that all the unused GPIOs are properly configured. And also ensure that all peripherals that are not used are disabled. Is your firmware configured to low power modes? When the nRF7002 is connected to the nRF5340, even if it's OFF, this can still affect the power consumption.

Regards,

Priyanka

RE: nrf5340 sleep currrent consumption

Lavanya_Manohar — Wed, 19 Jun 2024 04:40:19 GMT

Hi priyanka,

[quote userid="107729" url="~/f/nordic-q-a/112208/nrf5340-sleep-currrent-consumption/489299"]Do you have any peripherals connect to the 5340? [/quote]

In our custom board, nrf7002 is connected to 5340 but we keep it OFF by hardware control.
Then we have one capacitve interrrupt connected to 5340, we have isolate the interrupt and then measures reduced to 0.46mA.

RE: nrf5340 sleep currrent consumption

Priyanka — Tue, 18 Jun 2024 12:20:23 GMT

Hi Lavanya,

Do you have any peripherals connect to the 5340? Have you made any hardware changes?

Regards,

Priyanka