What is the cause of reset reason 0x01?

[arshi]

My device is getting reset when left idle for sometime. On checking the logs, I see that the nrf_power_resetreas_get() returns reset reason as 0x01. I am using NRF SDK 17.1.0. 

What does reset value 0x01 signify?

[Jørgen Holmefjord]

Hi,

The reset reason comes from the RESETREAS register.

0x01 means bit A is set, which means a pin reset was detected.

Best regards,
Jørgen

[arshi]

My device was left idle without any BLE interrupts. Any idea about what might be the possible causes of pin reset?