Address agreement detection device, communications control system and address agreement method of detection

摘要

An address match determining device has an address filter memory (22) for storing a matrix or table having a plurality of elements each of which is a 1-bit address match determination data indicating whether or not a corresponding N-bit address code is available, and is distinguished by a pair of a first index composed of the m most significant or high-order m bits of the corresponding address code and a second index composed of the remaining lowest or low-order (N-m) bits of the corresponding address code. A received-address latch (21) extracts the high-order m bits and remaining low-order (N-m) bits from an address code latched thereinto. The device searches through the table for one 1-bit address match determination data specified by the first index composed of the extracted high-order m bits and the second index composed of the extracted low-order (N-m) bits, and then determines whether or not the latched address is available on the basis of the 1-bit address match determination data searched for.