The number of interrupt vectors of 8051 is ______ .
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If a relation is anti-symmetric, then this relation cannot be symmetric.( )
For 8051 edge-triggered external interrupt, once the ISR is started, the corresponding interrupt request flag is cleared to 0 automatically. ( )
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.