DUPLEX PACKET BUS SELECTING CIRCUIT OF PACKET PROCESSING DEVICE

摘要

When data transmission between packet processing units or between a control processor and packet processing unit, the selection circuit selects multiple packet bus which enhances reliability of data transmission. Selection circuit comprises interrupt processing unit to generate operate/wait selection control interrupt to packet processing unit; state change detection unit to generating operate/wait state change interrupt by comparing old state and current state of operate/wait signal.