61. What is the total external data memory that can be interfaced to the 8051?
62. Considering figure 1, if SI = 1000H, the content of register AH after the instruction MOV AH, [SI] of 8086 µp will be
63. In a computer, set of electrical paths which is used to transfer data is called
64. Address bus of 8086 contains
65. An 8-bit microprocessor has the typical two way connected buffered lines which are called:
66. Consider the following statements:
The 8259A Programmable Interrupt Controller can
1. manage eight interrupts
2. vector an interrupt request anywhere in the memory map
3. have 8-bit or 16-bit interval between interrupt vector locations
4. be initialized with operational command words
Which of the above statements are correct?
The 8259A Programmable Interrupt Controller can
1. manage eight interrupts
2. vector an interrupt request anywhere in the memory map
3. have 8-bit or 16-bit interval between interrupt vector locations
4. be initialized with operational command words
Which of the above statements are correct?
67. A controller that takes control of the buses and transfers data directly between source and destination bypassing the microprocessor is known as
68. In a 8051 microcontroller, PCON register controls the baud rate in:
1. Synchronous transmission
2. Asynchronous transmission
1. Synchronous transmission
2. Asynchronous transmission
69. In 8051 family instructions, which one of the following option is true?
70. If the operating frequency of an 8086 microprocessor is 10 MHz and, if for the given instruction, the machine cycle consists of 4 T-states, what will be the time taken by the machine cycle to complete the execution of that machine cycle to complete the execution of that same instruction when three wait states are inserted?
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