Which of the following DAC provides the best resolution? ()
A. 4-bit
B. 8-bit
C. 10-bit
D. 12-bit
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If 8051 external interrupt is level activated, the external source must hold request active until the requested interrupt is responded. ( )
It is impossible for 8051 to write data to receiving SBUF. ( )
The number of interrupt vectors of 8051 is ______ .
If a relation is anti-symmetric, then this relation cannot be symmetric.( )