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Microprocessors
Questions
Program
Write a program to add two8-bit numbers using8051?
2 years ago
Microprocessors
MOVA,#30H
ADDA,#50H
0
Rusma Khadka
Sep 10, 2022
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28. Write a program to subtract the contents of R1 of bank0 from the contents of R0 of bank2 using 8051?
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30. Write a program to swap two numbers using8051?
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37. Write a program to load accumulator a, DPH and DPL with 30H?
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39. Write a program using 8051 assembly language to change the data 55h stored in the lower byte of the data pointer register to AAH using rotate instruction?
40. What is an USART?
41. What is the size of ports in 8255?
42. What is the purpose of control word written to control register in 8255?
43. What is a control word?
44. List the operation modes of 8255?
45. What is the use of modem control unit in 8251?
46. What are the modes used in keyboard modes?
47. Define scan counter?
48. Give the different types of command words used in 8259A
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50. What are the features used mode1 in 8255?
51. What is synchronous data transfer?
52. What is the various programmed data transfer method?
53. What is the use of 8051 chip?
54. What are the modes of operation used in 8253?
55. List the addressing modes of 8051?
56. List the features of 8051 microcontroller?
57. Write a program to subtract the contents of RI of Bank0 from the contents of R00f Bank2.
58. Name the five interrupt sources of 8051?
59. Compare Microprocessor and Microcontroller.
60. Explain the register IE format of 8051
61. Name the special functions registers available in 8051
62. Give the memory size of 8051 microcontroller
63. What are the applications of microcontroller
64. Specify the single instruction, which clears the most significant bit of Bregister of 8051,without affecting the remaining bits.
65. Give the alternate functions for the port pins of port3?
66. 3. State the function of RS1 and RS0 bits in the flag register of Intel8051microcontroller?
67. Explain DJNZ instruction of Intel8051 microcontroller ?[
68. What is mean by microcontroller
69. What are subroutine?
70. Compare CALL and PUSH instructions
71. Why do we use XRAA instruction?
72. Define stack and stack related instructions?
73. What is the use of addressing modes, mention the different types?[
74. Explain the different instruction format set
75. Explain LDA, STAANDDAA instructions
76. Mention the categories of machine control group of instruction
77. List the four instructions which control the interrupt structure of the 8085 microprocessor?
78. What is the difference between the shift and rotate instructions?
79. Explain the purpose of the I/O instructions IN and OUT
80. Explain the use of branch instruction and give example.
81. List out the five categories of the 8085 instructions.Give e.g. of the instructions for each group?
82. How many operations are there in the instruction set of 8085 microprocessor?
83. What is an instruction?
84. How many machine cycles does 8085 have, mention them?
85. Define instruction cycle, machine cycle and T-state?
86. Steps involved to fetch a byte in 8085?
87. What are the basic units of a microprocessor ?
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92. Define the function of parity flag and zero flag n 8085
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95. What is tristate logic?[june 2009]
96. What is the need of ALE signal in 8085 microprocessor?
97. Specify the size of data, address, memory word and capacity of 8085 microprocessor
98. List the control and status signal of 8085 microprocessor and mention its need?
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100. What is difference between microprocessor and microcontroller?
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109. What is ale in microprocessor?
110. What is adc in microprocessor?
111. What is embedded microprocessor?
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113. What is memory mapping in microprocessor?
114. What is data bus in microprocessor?
115. What is assembler in microprocessor?
116. What is 8 bit microprocessor?
117. What is 16 bit microprocessor?
118. What is macro in microprocessor?
119. What is opcode and operand in microprocessor?
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