| 摘要 |
PURPOSE:To improve the efficiency of using bits by providing plural slave devices with means which decide the agreement or disagreement of a NAME and inhibit slave equipments except for the one specified by the NAME added to 1st data. CONSTITUTION:When a host equipment 1 transmits a strobe signal (to show the existence of a series of data) and the 1st data through a bus 5, the slave equipments 2, 3 and 4 compare the NAME in the 1st data with NAMEs set through their NAME switches 9 at the timing of the rise of the strobe signal with the aid of comparators 6. Since the NAME of the 1st data shows the slave equipment 2, the comparators 6 for the slave equipments 3 and 4 detect the disagreement of their NAMEs, and output a guard signal 8 that inhibits inputting data in their data input buffers 7. The guard signal 8 continues until the strobe signal disappears. Thus the 1st data is fetched only by the slave equipment 2. |
