| 摘要 |
PURPOSE:To effectively perform the data transmission in near or intermediate distance with a simple line constitution, by providing the clock generator at either one of a pair of communication line connection units only, and using this output as the reception element timing for another unit. CONSTITUTION:The communication line connection units 200 and 250 are located between the first and second communication control units 110, 114 performing transmission and reception of data, and the data transmission communication lines 204, 254 and the timing signal communication lines 205, 255 are connected between the units 200 and 250. The units 200 and 250 to the lines 204 to 254 are provided respectively with the data transmission circuit 230, 290 and the timing reception circuit 240, 280. Further, the circuits 210, 270, 230, 290 are provided with the photo coupling circuits 213, 271, 234, 291, and the circuits 230 and 290 are provided with the clock generation circuits 232, 293 to simplify the constitution of the units 200, 250 and the lines 204, 254, 205 and 255. |
