How does NRF52840 chip use SPIM3 peripherals to enter low power consumption

[kwwnatl]

After nrf52840 uses the SPIM3 peripheral to send data, turn off the SPIM3 peripheral to enter low power consumption, and there will be 700UA current; if the SPIM3 peripheral is not used to send data (only for SPIM3 initialization, after entering low power consumption, only 15UA current). Excuse me, how can I use the SPIM3 peripheral to send data, and after it can enter low power consumption, there is only 15UA current.

[awneil]

Are you sure it's actually the SPIM3 peripheral that's taking (all) the excess current? Perhaps the slave(s) it's connected to are (also) drawing extra current ... ?

[Jared]

Hi there,

• Are you using a custom board or the development kti?
• Is the 700 µA current static after you enter low power mode or is it peaks?
• Does the current change if you disconnect it from the slave when you enter low power mode?

regards

Jared