| 摘要 |
<p>An initializing circuit (20) for setting the initial state of a latching circuit (30) in a semiconductor device when switching on a power supply. The initializing circuit is provided with a sensing circuit (TR1, TR2, R, 21) which operates according to switching on the power supply and senses that the power supply voltage (Vcc) increases to a predetermined voltage, and a circuit (22) for controlling output levels which responds to a sense signal (V1) outputted from the sensing circuit and pulls up the level of the output signal (Vout) of the initializing circuit to a high potential level or pulls down it to a low potential level. After the power is interrupted and when the power is supplied again, the latching circuit (30) is fed with the output signal controlled by the circuit (22) as its power source voltage. Consequently the latching circuit can be reliably initialized, and the malfunction on restart is prevented.</p> |
