| 摘要 |
PURPOSE:To specify an address through a few common wirings, by specifying the address only when a count signal sent from a counter transmitting circuit for respective addresses coincides with a held address. CONSTITUTION:A binary-coded signal sent from a computer is inputted to and held in an address counting and transmission stop signal sending circuit 11. The circuit 11 sends a pulse signal, i.e. address bit signal to a signal transmission line 12, counts the count signal sent from the counter transmitting circuit 13 for respective addresses, and compares the counted value with the held address to send a stop signal to a transmission stop signal transmitting circuit 20 only when they coincide with each other. The address hit signal is supplied to an address specification driving signal generating circuit 14, which sends a driving signal to drive an address specifying circuit 18; the address hit signal is further inputted to a signal delaying, regenerating, and amplifying circuit 15. When the address coincidence is not obtained at the circuit 11, the pulse advances to a next address. In ths case, the address specification of the address specifying circuit 18 is reset. When the address coincidence is obtained, the address is left specified. |
