| 摘要 |
PURPOSE:To ensure the longest sequence control, by controlling the output time of a control data on the basis of a coding data obtained by run length coding the output time of the same control data delivered continuously from latch circuits and storing them into an ROM. CONSTITUTION:An enable signal generator 51 compares 53 the value B obtained by counting pulses 24 supplied from a rotary encoder 21 by the 3rd counter 52 with a run length data A given from each output terminal QH of latch circuits 33-40 and then permits the counting of the 1st counter 23 when A=B is satisfied. The lower and upper addresses of an ROM32 are generated from the 1st and the 2nd counters 23 and 42 respectively. The addresses of the circuits 33-40 are designated by the address signal An of the counter 42, and these latch circuits read in output data O1-O8 of the ROM32 in time division and synchronously with the system clock signal of an oscillator 41. Then the circuits 33-40 supply their control output data O1A-O8H to the elements to be controlled. In such a way, it is possible to perform a long sequence control with a simple ROM. |
