| 摘要 |
<p>PURPOSE:To make a private page switching unnecessary and reduce the cost of parts and the operation time and make a device small-sized by providing a page switching designation key and using this key and an already provided ten-key to switch pages. CONSTITUTION:An output signal 0KEY-P from the ten-key is outputted from the output terminal of an AND gate 1, and the input terminal of the gate 1 is connected to the ''0'' output terminal of a page switching designation flag 23 and an inverter 5. When a switch SW0 is open, the ''0'' output terminal is connected to +Vp; and when it is close, it is grounded to GND. The set terminal of the flag 23 is connected to a page switching designation key SWP; and when the key SWP is open, the set terminal is connected to +Vp through a resistance 25; and when it is close, it is grounded to GND. Thus, the page switching designation key is depressed and a page number is inputted from the ten-key part to switch pages. Consequently, the private page switching key is unnecessary, and the cost of parts and the operation time are reduced, and the device is made small-sized.</p> |
