Abstract: An architecture is presented that provides a system of sensors and other components that allow law enforcement officials to continuously monitor the exterior perimeter of his or her stationary vehicle for approaching attackers. The system affords 360 degree surveillance and protection and is capable of alerting the vehicle's occupants and remote users of the system of an impending attack.

Abstract: For testing an integrated circuit with sequential logic its register stages are arranged in series as a shift register. This may give rise to delay time problems, which can be avoided by two-phase operation of the register stages, as is the case in, for example, the known LSSD technology. However, for a high processing speed edge-clocked register stages are more favorable. The invention therefore proposes register stages which can readily be switched between two-phase operation during testing and edge control in normal operation. For this only one additional clock line is required.