图示的电路适用于微处理器(μP)系统之手动中断开关。对一按钮S_1之常闭接点具有防反弹的作用,确保每按一次S_1,只产生一个V_(OUT)负脉冲(对高电位动作之中断,可使用正反器的Q输出)。 S_1由弹片定位在图中所示的常闭位置(NC),使复位输入(脚1)为低电位,因此V_(OUT)为高电位。当按下时,S_1暂时切换至常开位置 The circuit shown is for a manual interrupt switch in a microprocessor (μP) system. The normally closed contact of a button S_1 is anti-bouncing, ensuring that only one V OUT negative pulse is generated each time S_1 is pressed (the Q output of the flip-flop can be used for the interruption of the high-level operation). S_1 is located in the normally closed position (NC) shown in the figure by the shrapnel so that the reset input (pin 1) is at a low level, so that V OUT is at a high level. When pressed, S_1 temporarily switches to the normally open position