题目内容

In the same level, except for serial port, the lowest level interrupt source of MCS-51 single chip microcomputer is ().

A. External interrupt 1
B. Timer T0
C. Timer T1
D. Serial port

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In the same level, except INT0, the interrupt source with the highest level is ().

A. External interrupt 1
B. Timer T0
C. Timer T1
D. External interrupt 0

When the timer T0 sends an interrupt request, the interrupt response condition is().

A. SETB ET0
B. SETB EX0
C. MOV IE,
D. 82H
E. MOV IE,
F. 61H

When the CPU responds to the interrupt request of timer T1, the content of program counter PC is ().

A. 0003H
B. 000BH
C. 00013H
D. 001BH

The instruction of MCS-51 MCU CPU on / off is.

A. SETB EA
B. SETB ES
CLR EA
D. SETB EX0