| 摘要 |
PURPOSE:To attain the display of all numbers without increasing the number of display digits by reading a dial number in a memory in time division while distinguishing a normal number from an added number in response to the operating mode of a key switch. CONSTITUTION:When the dial key is turned on, a CPU1 transfers dial number information from a nonvolatile memory 9 to an RAM5 during on-period, reads sequentially number of digits corresponding to the added number in the number information from the RAM5, inputs it serially to a liquid display device 8 with shift and displays it as shown in Fig. (a). When the subscriber releases the on-state of the dial key in this state, the CPU1 reads the number of digits corresponding to the normal number in the dial number information transferred into the RAM5 and displays it on the liquid crystal display device 8 as shown in Fig. (b). After they are displayed continuously for a prescribed time, the display is turned off and restored to the initial state. Since the distinguishing of the added number and the normal number depends on whether the dial key is kept depressed or released, the operability is high. |
