"HIGH ANGLE-OF-ATTACK PROTECTION
In normal law, the aircraft is protected against stall. This protection is also effective in dynamic maneuvers or gusts. When the current AOA becomes greater than αPROT, the high AOA protection activates. Without flight crew input, the F/CTL computers maintain the AOA equal to αPROT. The AOA can be further increased by flight crew input, up to a maximum value equal to αMAX. When the High AOA protection is activated, the normal law demand is modified and the sidestick input is an AOA demand, instead of a load factor demand. The flight crew must not deliberately fly the aircraft with a High AOA, except for short periods of time, when maximum High Lift coefficient is required (like during windshear or GPWS maneuvers).
Vα PROT, Vα Floor, Vα MAX are mainly computed based on the AOA, and therefore they vary with configuration, weight and load factor. The AOA will not exceed αMAX, even if the flight crew gently pulls the sidestick all the way back. The flight crew can hold full back sidestick, if it is needed, and the aircraft stabilizes at an AOA close to but less than the 1 g stall. When flying at αMAX, the flight crew can make gentle turns, if necessary. If the flight crew releases the sidestick, the AOA returns to αPROT and stays there. As the aircraft enters protection at the amber and black strip (αPROT), the system inhibits further nose-up trim beyond the point already reached. The nose-down trim remains available.
This High AOA protection has priority over all other protections. The aircraft can also enter αPROT at a high flight level, where it protects the aircraft from the buffet boundary. Like in low speed or low flight level, if the sidestick is simply released to neutral, the aircraft maintains the alpha for αPROT. Therefore, when leaving a turn after entering αPROT, the aircraft may climb with the sidestick free. Alpha for αPROT is reduced as a function of Mach. If the flight crew flies into αPROT, they should leave it as soon as other considerations allow. This is achieved by easing forward on the sidestick to reduce alpha below the value of αPROT. The flight crew should also simultaneously add thrust (if the αFloor has not yet been activated, or cancelled). Between the αPROT and αMAX, αFloor protection may automatically set the go-around thrust. The αFloor will usually be triggered just after entering αPROT, and the go-around thrust will automatically be applied. Therefore, if the sidestick is held aft, either inadvertently or deliberately, the aircraft will start to climb at a relatively constant low airspeed. To recover a normal flight condition, the αPROT should be exited by easing forward on the sidestick, as described above, and the αFloor should be cancelled by using the instinctive disconnect pushbutton on either thrust lever as soon as a safe speed is regained"