题目内容

When MCS-51 single chip microcomputer applies for interrupt from the same priority interrupt source at the same time, CPU responds first.

A. External interrupt 0
B. External interrupt 1
C. Timer 0 interrupt
D. Timer 1 interrupt

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The interrupt request flag of external interrupt 1 of MCS-51 is ()

A. ET1
B. TF1
C. IT1
D. IE1

Timer T0 interrupt can be interrupted by external interrupt 0.

A. 对
B. 错

Only when an interrupt request is sent by an interrupt source and the CPU interrupts, can the CPU respond to the interrupt.

A. 对
B. 错

The same level interrupt in AT89S51 can't be nested.

A. 对
B. 错