| 摘要 |
<p>PURPOSE:To eliminate the need of another separate signal line, and also, to simplify the program of a CPU by converting a result of detection to other key code than a key code for showing a key input, and transmitting it to the CPU by a transmission means, when a voltage of a battery becomes a prescribed value or below. CONSTITUTION:A transmission means 3 converts a key input from a keyboard 2 to a key code for showing its key input and transmits it to a CPU 4, and on the other hand, whether a voltage of a battery 1 is a prescribed value or below or not is detected and a result of its detection is converted to other key code than a key code for showing the key input and transmitted to the CPU 4. When the key code sent from the transmission means 3 is other key code than the key code for showing the key input from the keyboard 2, the CPU 4 judges that the voltage of the battery 1 drops to the prescribed value or below and executes a necessary processing. In such a way, a separate signal line is not required, and also, the program of the CPU 4 is simplified.</p> |
