Discussion
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- Question
The internal RAM memory of the 8051 is:
Options- A. 32 bytes
- B. 64 bytes
- C. 128 bytes
- D. 256 bytes
- Correct Answer
- 128 bytes
- 1. An alternate function of port pin P3.1 in the 8051 is:
Options- A. serial port input
- B. serial port output
- C. memory write strobe
- D. memory read strobe Discuss
- 2. The I/O port that does not have a dual-purpose role is:
Options- A. port 0
- B. port 1
- C. port 2
- D. port 3 Discuss
- 3. The microcontroller is useful in systems that have nonvariable programs for dedicated applications.
Options- A. True
- B. False Discuss
- 4. The contents of the accumulator after this operation
MOV A,#2BH
ORL A,00H
will be:
Options- A. 1B H
- B. 2B H
- C. 3B H
- D. 4B H Discuss
- 5. The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.
Options- A. True
- B. False Discuss
- 6. Which of the following commands will copy the contents of RAM whose address is in register 0 to port 1?
Options- A. MOV @ P1, R0
- B. MOV @ R0, P1
- C. MOV P1, @ R0
- D. MOV P1, R0 Discuss
- 7. Which of the following instructions will load the value 35H into the high byte of timer 0?
Options- A. MOV TH0, #35H
- B. MOV TH0, 35H
- C. MOV T0, #35H
- D. MOV T0, 35H Discuss
- 8. The ADC0804 has ________ resolution.
Options- A. 4-bit
- B. 8-bit
- C. 16-bit
- D. 32-bit Discuss
- 9. The I/O ports that are used as address and data for external memory are:
Options- A. ports 1 and 2
- B. ports 1 and 3
- C. ports 0 and 2
- D. ports 0 and 3 Discuss
- 10. To interface external EPROM memory for applications, it is necessary to demultiplex the address/data lines of the 8051.
Options- A. True
- B. False Discuss
The 8051 Microcontroller problems
Search Results
Correct Answer: serial port output
Correct Answer: port 1
Correct Answer: True
Correct Answer: 2B H
Correct Answer: False
Correct Answer: MOV P1, @ R0
Correct Answer: MOV TH0, #35H
Correct Answer: 8-bit
Correct Answer: ports 0 and 2
Correct Answer: True
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