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The 8051 Microcontroller
The 8-bit address bus allows access to an address range of:
0000 to FFFFH
000 to FFFH
00 to FFH
0 to FH
Correct Answer:
00 to FFH
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The 8051 Microcontroller
Which of the following commands will copy the contents of location 4H to the accumulator?
The following command will rotate the 8 bits of the accumulator one position to the left: RL A
An alternate function of port pin P3.0 (RXD) in the 8051 is:
The following command will copy the accumulator to the location whose address is 23H: MOV 23H,A
When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:
Which of the following statements will add the accumulator and register 3?
Which of the following instructions will move the contents of the accumulator to register 6?
The statement LCALL READ passes control to the line labelled READ.
Data transfer from I/O to external data memory can only be done with the MOVX command.
This program code will be executed continuously: STAT: MOV A, #01H JNZ STAT
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