题目内容

Which of the following SFRs is bit-addressable? ( )

A. DPH
B. DPL
C. B
D. TMOD

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The 8051 does not have bit-level instructions for ( )

AND
B. OR
C. complement
D. Exclusive OR (XOR)

Which of the following instruction is invalid? ( )

A. SETB C
B. SETB B
C. ANL C, 00H
D. MOV C, 10H

To complement the A, we must XOR it with( )

A. 7FH
B. 80H
C. FEH
D. FFH

To set MSB of the A to 1, we must OR it with( )

A. 00H
B. 01H
C. 80H
D. FFH