Q. In serial port interrupt, after the control is transferred to the interrupt service routine, the flag that is cleared is

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Q. The atleast number of machine cycles for which the external interrupts that are programmed level-sensitive should remain high is

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Q. If the external interrupts are programmed edge sensitive, then they should remain high for atleast

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Q. The timer generates an interrupt, if the count value reaches to

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Q. The external interrupt that has the lowest priority among the following is

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Q. Among the five interrupts generated by 8051, the lowest priority is given to the interrupt

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Q. Among the five interrupts generated by 8051, the highest priority is given to the interrupt

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Q. All the interrupts are enabled using a special function register called

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Q. The number of bytes stored on the stack during one operation of PUSH or POP is

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Q. The step involved in PUSH operation is

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Q. The step involved in POP operation is

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Q. The 8051 stack is

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Q. After reset, the stack pointer(SP) is initialized to the address of

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Q. The address register for storing the 8-bit addresses can be

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Q. The instruction, ADD A, R7 is an example of

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Q. The instruction, ADD A, #100 performs

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Q. In which of these addressing modes, a constant is specified in the instruction, after the opcode byte?

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Q. The only memory which can be accessed using indexed addressing mode is

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Q. The data address of look-up table is found by adding the contents of

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Q. Which of the following is not an instruction of 8051 instructions?

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