Assuming a very fast reset, this takes twice the time to read the array, to achieve an image with minimum integration time. In this case, a single pixel integrates light only as long as it takes to read the array once. The new Full MPIA mode is 'line orientated'. You read one line, reset the same line and read it again. Do this for the hole array.
Next cycle is the same.
You read one line, reset the same line and read it again. To archive a double correlated image, you subtract the second read of the first cycle from the first read of the second cycle. Repeat this for the hole array. This overhead becomes negligible when taking many frames in a row. For a single image, this mode shows no advantage to the MPIA mode, it rather has the disadvantage of the longer minimum itegration time.