| 摘要 |
PURPOSE:To switch key input detecting means in accordance with the purpse of application, by actuating either one of plural key input detecting means of different keying data compensating systems in response to a command given from the main body of a system unit. CONSTITUTION:For a composite system unit, key input detecting means of different keying data compensating systems are provided between a keyboard and the main body of the system unit. That is, the means 1 and 2 apply a key lock- out system and an N key roll-over system respectively. The means 1 can work with the non-inverted output signal of an FF3; while the means 2 can be actuated with the inverted output signal of the FF3. The FF3 latches a command S1 given from the unit of the system unit by a clock pulse CLK and selects a means 1 or 2. |
