| 摘要 |
PURPOSE:To protect the important functions, by changing the processable functions of a register at a specific time band. CONSTITUTION:Keys (a), (b) and (c) are provided to a key input device 3 to inhibit an input at a specific time band such as the refund, the cerdit sale, etc. When a set mode switch 14 in a mode switch 12 is pushed, the device is set in the setting mode of time. Then the time band information is stored in a buffer 15 by a key input device 1 and via a key encoder 2. With a push of a time key 16, the time information of the buffer 15 is stored in a memory 18 via an AND gate 17. Then the time information of a timing means 19 is compared with the set information of the memory 18 for a decision 20. Thus a high-level signal is produced in case the present time is out of a specific time band; and a low-level signal is produced if the present time is within the specific time band. As a result, the operation is inhibited for gates 21, 22 and 23 respectively. |
