| 摘要 |
PURPOSE:To remarkably save the quantity of hardware by adopting the constitu tion in which both forward/reverse data are obtained by a single output circuit depending on the changeover of the forward/reverse operating direction of a two-way delay device and the changeover of a selector. CONSTITUTION:In inputting a data to parallel input terminals 71-73 in the forward operation, the two-way delay devices 74-76 act like a shift register of series connection serving the parallel/serial conversion. Similarly, in the reversing, when a data is inputted to the parallel input terminals 71-73, the two-way delay devices 74-76 act like a shift register of series connection serving the parallel/serial conversion. Thus, a parallel/serial conversion means 83, in converting a parallel data inputted from the parallel input terminals 71-73 into a serial data, has a function outputting the data sending order in the forward direction and a function outputting the order reversely altogether. Thus, both the forward/reverse serial data outputs are obtained by having only to switch the output data by the selector 70. |
