| 摘要 |
PURPOSE:To prevent the misoperation of data write-in, by illuminating all the display devices corresponding to a plurality of preset switches operated before, every time a common storing switch is in operation. CONSTITUTION:When a storing switch MSW6 is depressed, a storing circuit 1 is possible for write-in for a given time and RS latches 8, 9 are reset at the same time. When preset switch PSW4 is depressed with this state, the latch 8 is set, data is written in the circuit 1 and a display device 14 illuminates. In this case, the output L level of a monostable multivibrator 7 is inverted at the inverter 20 and it is fed to the set terminal of the RS latch 16 via SW21 at the moment when PSW4 is depressed, and the display device 14 is illuminated via an AND circuit 18, the monostable multivibrator 7 is inverted, and it is distinguished with readout made possible from the circuit 1. When MSW6 is again depressed, the display device 14 illuminates via the circuit 18 and write-in in the address corresponding to PSW4 is informed, and data is written in another address when PSW5 corresponding to the display device 15 not illuminated is depressed. |
