外部输入中断源INT0和INT1，由中断控制寄存器TCON的IT1（TCON.2）和IT0（TCON.1）分别控制外部输入中断1和中断0的中断触发方式。若为0，则外部输入中断控制为电平触发方式；若为1，则控制为边沿触发方式。

-INT0 External interrupt source input and INT1, the interrupt control registers TCON the IT1 (TCON.2) and IT0 (TCON.1), respectively external input interrupt 1 control and interrupt 0 interrupt trigger. For 0, the external input is level-triggered interrupt control mode　if 1, the control for the edge trigger.