题目内容

What should be the values of RS1 and RS0 bits of PSW SFR to select register bank #2? ( )

A. 1 and 0
B. 1 and 1
C. 0 and 0
D. 0 and 1

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Which register bank is selected by default after system reset? ( )

A. bank 0
B. bank 1
C. bank 2
D. bank 3

Bit-addressable internal RAM has address range of ( )

A. 10H to 1FH
B. 20H to 2FH
C. 30H to 3FH
D. 40H to 4FH

In the 8051, SP is () wide register. ( )

A. 8 byte
B. 8 bit
C. 16 bit
D. 32 bit

What is the address range of SFRs in the 8051 ( )

A. 00H-7FH
B. 20H-2FH
C. 30H-7FH
D. 80H-FFH