超星 - 第四章作业2-单片机的中断系统 - 查题吧

单选题

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

单选题

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

单选题

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

单选题

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

单选题

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

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

单选题

MCS-51 single chip microcomputer external interrupt 0, interrupt command is ().

A. SETB ETO
B. SETB EXO
CLR ETO
D. SETB ET1

单选题

The trigger mode selection bits of external interrupt 1 and external interrupt 0 of MCS-51 single chip microcomputer are ().

A. Tr1 and tr0
B. IE1 and ie0
C. It1 and it0
D. TF1 and TF0

单选题

There are five interrupt sources in 8051 single chip microcomputer. In the same level, when five interrupt sources send interrupt requests at the same time, the content of program counter PC becomes ().

A. 000BH
B. 0003H
C. 0013H
D. 001BH

单选题

The process of MCS-51 MCU responding to interrupt is ().

A. The breakpoint PC automatically presses the stack and loads the corresponding interrupt vector address into the PC
B. Turn off the interrupt and the program goes to the interrupt service program
C. The PC points to the interrupt service program address
D. The breakpoint PC automatically presses the stack, loads the corresponding interrupt vector address into the PC, and the program turns to the vector address

单选题

MCS-51 response interrupt vector address is.

A. The first address of the interrupt service program
B. Exit address of interrupt service program
C. The entry address of the interrupt service program
D. The address of the main program waiting for interrupt instruction

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