题目内容
The interrupt request flag of external interrupt 1 of MCS-51 is ()
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Timer T0 interrupt can be interrupted by external interrupt 0.
Only when an interrupt request is sent by an interrupt source and the CPU interrupts, can the CPU respond to the interrupt.
The same level interrupt in AT89S51 can't be nested.
External interrupt 0 can interrupt the interrupt service program of external interrupt 1.
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