Regarding current consumption when configuring interrupts.

[sst_S.Sakamoto]

Hello,

I am using the following device and development kit:

• Device: NORA-B106-00B (nRF5340)
• nRF Connect SDK: 2.0.2

When an interrupt is configured on the GPIO pin as shown below, the current consumption during sleep increases by 30 to 90 μA.

gpio_pin_configure_dt(&ms_intrtc, GPIO_INPUT);
gpio_pin_interrupt_configure_dt(&ms_intrtc,GPIO_INT_EDGE_TO_ACTIVE);

When no interrupt is configured, the current draw in sleep is around 5 μA. Is it expected for the current draw to increase this much when an interrupt is configured?

Best regards,

[Vidar Berg]

Hello,

GPIOTE IN events increase the idle current. To avoid this, you can use the GPIOTE PORT events for edge detection instead. Enabling PORT events do not affect the idle current.

To do this, you can use the 'sense-edge-mask' property in your 'gpio' devictree node. E.g., https://github.com/nrfconnect/sdk-nrf/blob/a1661e7a2a7161c80e97c4805ae290d6139d9545/boards/nordic/thingy91x/thingy91x_nrf9151_common.dts#L92 

Best regards,

Vidar

[sst_S.Sakamoto]

Hello Vidar,

Thank you very much for your prompt reply.

By using GPIOTE PORT events for edge detection, I was able to reduce the current consumption during idle to 5 μA.

Best regard,