题目内容

For 8051 edge-triggered external interrupt, once the ISR is started, the corresponding interrupt request flag is cleared to 0 automatically. ( )

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The number of bytes reserved for each interrupt vector table of 8051 is ______

If Timer 1 of 8051 counts in mode 2, after executing the instruction “MOV TL1, #00H”, it will generate the overflow after counting ______ numbers.

The P2 port of 8051 can be used for general I/O or as the low byte of the address bus for access external memory with MOVX instruction.

In 8051, () interrupt has the highest natural priority.

A. External 0
B. External 1
C. Timer 0
D. Serial port