1.流程图 五、思考题
1.简述中断处理的一般过程。 2.脉冲方式如何防止重复响应外中断。 六、原理图
INR2F100RESETVCCLED1510VCCU1FP1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7123456789P3.0P3.1P3.2P3.3P3.4P3.5P3.6P3.7XTAL1A11.0592MHz1011121314151617181920P1.0P1.1P1.2P1.3P1.4P1.5P1.6P1.7RSTP3.0/RXDP3.1/TXDP3.2/INT0P3.3/INT1P3.4/T0P3.5/T1P3.6/WRP3.7/RDXTAL2XTAL1VSS89C51VCCP0.0P0.1P0.2P0.3P0.4P0.5P0.6P0.7EAALE/PROGPSENP2.7P2.6P2.5P2.4P2.3P2.2P2.1P2.0VCC4039P0.038P0.137P0.236P0.335P0.434P0.533P0.632P0.73130292827262524232221EAALEPSENP2.7P2.6P2.5P2.4P2.3P2.2P2.1P2.0开始 中断入口 设置初始状态 保护现场 设置中断控制寄存器 状态位取反 状态位输出 中断允许 恢复现场 等待中断 中断返回 主程序框图
外部中断子程序框图
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