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Microcontroller and Embedded Programming: The Microcontroller Architecture and Programming of 8051
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Microcontroller and Embedded Programming: The Microcontroller Architecture and Programming of 8051
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25 Questions

1. Which of the following best describes the use of framing in asynchronous means of communication?
2. The addressing mode, in which the instructions has no source and destination operands is
3. What do you mean by micro in microcontroller?
4. Which of the following combination is the best to enable the external hardware interrupt 0 of the IE register (assuming initially all bits of the IE register are zero)?
5. Find out the roll over value for the timer in Mode 0, Mode 1 and Mode 2?
6. The directive that updates the location counter to the next even address while executing a series of instructions is
7. Match the following: a) DB 1) used to direct the assembler to reserve only 10-bytes b) DT 2) used to direct the assembler to reserve only 4 words c) DW 3) used to direct the assembler to reserve byte or bytes d) DQ 4) used to direct the assembler to reserve words
8. The labels or constants that can be used by any module in the program is possible when they are declared as
9. In unsigned number addition, the status of which bit is important?
10. How are the bits of the register PSW affected if we select Bank2 of 8051?
11. The open drain bidirectional (input or output) port with internal pullups is
12. AT89C2051 has RAM of:
13. Which register is used to make the interrupt level or an edge triggered pulse?
14. The address register for storing the 8-bit addresses can be
15. Which pin of the external hardware is said to exhibit INT0 interrupt?
16. If Timer 0 is to be used as a counter, then at what particular pin clock pulse need to be applied?
17. The port that can source or sink 4 LS TTL inputs when being used as an output port on each of its line is
18. The use of Address Latch Enable is to multiplex address and data memory.
19. Is ROM is used for storing data storage?
20. The data address of look-up table is found by adding the contents of
21. Which of the following best states the reason that why baud rate is mentioned in serial communication?
22. CJNE instruction makes _______
23. Which of the following is not one of the SFR addresses of the ports of 8051?
24. TF1, TR1, TF0, TR0 bits are of which register?
25. What is the difference between UART and USART communication?

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