8051 Microcontroller Architecture Assignment

QUESTION 1. What is the difference between the 8031 and the 8051?

1. The 8031 is ROM-less.
2. The 8051 has 64 bytes more memory.
3. The 8031 has no interrupts.
4. The 8051 is ROM-less.

QUESTION2. Which of the following statements will add the accumulator and register 3?

1. ADD A, R3
2. ADD R3, A
3. ADD @A, R3
4. ADD @R3, @A

QUESTION3. Which of the following instructions will move the contents of register 3 to the accumulator?

1. MOV A, 3R
2. MOV A, R3
3. MOV R3, A
4. MOV 3R, A

QUESTION4. Bit-addressable memory locations are:

1. 20H through 2FH
2. 30H through 3FH
3. 40H through 4FH
4. 10H through 1FH

QUESTION5. An alternate function of port pin P3.1 in the 8051 is:

1. memory write strobe
2. memory read strobe
3. serial port output
4. serial port input

QUESTION6. The number of data registers is:

1. 16.0
2. 64.0
3. 8.0
4. 32.0

QUESTION7. Microcontrollers often have:

1. ROM
2. all of the above
3. CPUs
4. RAM

QUESTION8. he ADC0804 has resolution.

1. 32-bit
2. 8-bit
3. 16-bit
4. 4-bit

QUESTION9. When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:

1. external data memory
2. internal data memory
3. external code memory
4. internal code memory

QUESTION10. MOV A, @ R1 will:

1. copy R1 to the accumulator
2. copy the contents of memory whose address is in R1 to the accumulator
3. copy the accumulator to R1
4. copy the accumulator to the contents of memory whose address is in R1

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