Is there a race condition in the GPIO DETECT signal?

[John]

For example, if I have a GPIO pin configured with low sense, and it goes low just before I call sd_power_system_off(), will the device return to System ON mode immediately, or is the pin transition lost?

[Ole Morten]

Yes, there should be no race condition here, and you should come out of the sleep immediately if a wake-up condition is true when you try to enter it.