TPL0102-100: WIP bit

Hi all

Would you mind if we ask TPL0102?

There is description on the datasheets as follows;
0 : Non-volatile write operation is not in progress
1 : Non-volatile write operation is in progress (it is not possible to write to the WR or ACR while WIP = 1)

Our customer confirmed the follow progress, as the result, in case of Read operation, they confirmed WIP bit=1.
Write operation(ACR) -> (in a continuous) -> Read operation(ACR)

And then, our customer confirmed the follow progress, they confirmed WIP bit=0.
Write operation(ACR) -> (20ms) -> Read operation(ACR)
So, how much time is required between Write operation and  Read operation with WIP bit=0?
Is it tWC(20ms)? Then, are there the tWC's value of maximum and minimum?

Kind regards,

Hirotaka Matsumoto