| 摘要 |
PURPOSE:To use only one cable and to simplify the circuit constitution, by using an m-bit acquit address bus (for searching a slave station transmitting REQUEST TO SEND), bidirectional address bus, n-bit bidirectional data bus and a 1-bit transmission request line as a common bus, and connecting between a master station and slave stations. CONSTITUTION:An operation control section 23 outputs an address data and a transmission data of any of slave stations after an H level of a transmission request line 8 is confirmed in the data transmission from the master station to the plural slave stations and outputs a gate signal (f) to bring a bidirectional address bus driver 25 and a bidirectional data bus driver 26 into the transmission mode so as to output the data on the bidirectional address bus 6 and the bidirectional data bus 7. Only the slave station coincident with the address data, latches a transmission data to a receiving data latch section and gives an output to an output terminal. |
