8 slots 7-11: reserved, 9 slot 12: i/o status, 5 ac-link low power mode – Intel PXA255 User Manual

8 slots 7-11: reserved, 9 slot 12: i/o status, 5 ac-link low power mode | 1 powering down the ac-link, 1 powering down the ac-link -12, Ac-link powerdown timing -12 | Intel PXA255 User Manual | Page 462 / 598