NS9360 GPIO access speed

Hi all, I’m in trouble. can anyone help me? I am trying sampling signal from GPIO with FIQ inturupt sevice using NS9360 netsilicon chip. But the GPIO access seems slow! I’m not native english speeker, so I’m not sure but reading the datasheet on P.57, Slow peripheral acknowledge timing shows the access is very slow. this is the access time? Anyway, I’d like to know the GPIO access speed, If I can configue it, could you tell me how to. BTW we are trying it within about 500nS. can we? Thank you.

Yes, it is very slow.