Cross bar apparatus, and method and program for controlling the same

摘要

The frequency of an internal clock is set at 1/2 the frequency of an external clock, and the width of the internal bus is configured to be twice as wide as the width of an external bus. A write control unit 74 controls a bypass unit 52 and a swap circuit unit 64 and, when a plurality of packets are received, writes words of the packets such that headers H of the received packets are respectively arranged alternately in each packet storage sector between an even-numbered queue 58-1 and an odd-numbered queue 58-2. A read control unit 76 reads the words of the packets in parallel by two words at each time from the even-numbered queue and the odd-numbered queue.