Why NRF51x GPIOTE input mode static current consumpts so high?

[Songplus]

As the datasheet showing The GPIOTE input mode consumpt upto 22uA ,it is inconceivable.I want use NRF51822 to design a ultra low power consumption production ,and use the GPIOTE INput even to wake up the system from sleep.So if use the GPIOTE input mode ,Does it mean that the system consumpts 22uA to monitor the input EVEN,or what the paramenter of the datasheet giving is wrong? Pleas give me a solution.

[Songplus]

SOS ....I need a professional answer.Where are the Nordic engineers? Why the chip's GPIOTE consums current so high?

[Lars Sundell]

I see that the support team has not answered this yet (probably because they find the answer provided by PrithviRaj Narendra correct). I am part of the design team and can confirm that PORT event is the best solution to ensure as low power consumption as possible. Using PORT event will give you the Igpio,idle current consumption. Please not that PORT event will not give you edge triggering, only level, so the IRQ handler may need some tuning if you need edge detect.