Microcontrollers Questions Set 6:
How many pins of the 8255 can be used as the I/O ports?
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What will be the final value of the code? MOV A ,#53H MOV R0, 58H ADD A,R0 DA A
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Which of the following is not a Special Function Register (SFR)?
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Which addressing mode is it ?
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Which pin in the 8051 microcontroller is used to enable/ disable the external memory interfacing ?
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Which of the following registers in the 8051 microcontroller is an 8-bit register?
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SCON register in the 8051 microcontroller is having the values 10001100. then the mode of microcontroller's serial communication is :
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How much time delay will be generated by NOP instruction in 8051, assuming a crystal frequency of 12 MHz ?
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Which addressing mode is used to push data onto the stack in the 8051 microcontroller?
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After the execution of the following 8051 assembly code, what will be the contents of the stack addresses 0AH and 09H?
MOV R0, #22H
MOV A, #77H
SETB PSW.3
MOV R0, #64H
PUSH 0
PUSH 8
PUSH 0E0H
(Assume default stack area and register bank 0)
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