| 摘要 |
<p>PURPOSE: To simplify the circuitry by depressing an operational switch under a state where a function switch is turned ON or OFF and assigning two types of function to each operational switch thereby eliminating a general input terminal for exclusive use. CONSTITUTION: A control means 33 detects the ON/OFF state of each operational switch SW1-SW4 and a function switch SW5. When an operational switch is depressed under a state where the function switch SW5 is turned ON, each operational switch is assigned with a function shown in column A. When the operational switch is depressed under a state where the function switch SW5 is turned OFF, each operational switch is assigned with a function shown in column B. In this regard, the control means for an AD conversion circuit does not require an input terminal being used exclusively for detecting the ON/OFF state of the function switch nor a connection line being used exclusively for the function switch in the connection of an operational switch block.</p> |
