The INT pin is pulled down, but sometimes it takes 1 second to interrupthttps://devzone.nordicsemi.com/f/nordic-q-a/128809/the-int-pin-is-pulled-down-but-sometimes-it-takes-1-second-to-interruptHi: I use ncs 3.3.0 and nrf54lm20dk. USB mode running phenomenon: Mouse stuttering. But use ncs 3.1.0 mouse is very smooth. Since the ncs3.1.0 version does not support nrf54lm20 BLE, I switched to ncs3.3.0.en-USTelligent Community 13Mon, 27 Jul 2026 11:58:34 GMTRE: The INT pin is pulled down, but sometimes it takes 1 second to interrupthttps://devzone.nordicsemi.com/thread/569506?ContentTypeID=1Mon, 27 Jul 2026 11:58:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5c3a3ff1-e1e5-46ce-a93d-99c30b807f99Vidar Berg<p>Hello,</p> <p><span>When defining a &quot;direct&quot; ISR (Ref.&nbsp;<a href="https://nrfconnectdocs.nordicsemi.com/ncs/latest/zephyr/kernel/services/interrupts.html#defining-a-direct-isr">https://nrfconnectdocs.nordicsemi.com/ncs/latest/zephyr/kernel/services/interrupts.html#defining-a-direct-isr</a>), </span>it is important to return &quot;1&quot; from the ISR if you want the scheduler to run on return, which is required in your code if you want the PMW3360_EVENT_DATA_READY event to be processed immediately after the interrupt. Please try this and check if it fixes the pin interrupt detection&nbsp;delay you are&nbsp;observing.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>