| 摘要 |
PURPOSE:To easily designate an optical equipment group at the time of communication by allowing a reception side equipment to mask a part of ID and present ID in the broadcast communication mode to set plural equipment group applying broadcast communication. CONSTITUTION:The content of an equipment identification number (ID) mask register 30 is validated by a broadcast signal and an AND gate 31. The output of the AND gate 31 is bit mask information relating to a DID (destination ID) and present ID in a command, the outputs of AND gates 32, 33 are inputted to a collation circuit 23 and when both are coincident with each other, the output of the collation circuit 23 goes to logic 1 and the communication signal is received. Thus, by masking a part of the ID plural equipments where DID in the command are coincident with the present ID are provided. Then plural equipments for broadcast communication are set and one of an optional equipment group is easily designated at the time of communication. |
