外部中断1将AT89S52从空闲模式"唤醒"

* 硬件条件：1.CPU型号：AT89S52

* 2.晶振：12.000MHz

* 3.用跳线帽短接P2.3__SI2

* 用跳线帽短接P2.2__RCK2

* 用跳线帽短接P2.1__SCK2

* 4.用跳线帽短接KEY3_P3.3

* 5.用跳线帽短接BEEP_P1.3

* 6.用跳线帽短接LED11__P1.7-External Interrupt 1 AT89S52 from the idle mode, " wake up" * hardware: 1.CPU Model: AT89S52* 2. Crystal: 12.000MHz* 3. Shorted with jumper caps P2.3__SI2* shorted with jumper caps P2. 2__RCK2* shorted with jumper caps P2.1__SCK2* 4. shorted with jumper caps KEY3_P3.3* 5. shorted with jumper caps BEEP_P1.3* 6. shorted with jumper caps LED11__P1.7