Q. Name the architecture and the instruction set for microcontroller?

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Q. Number of I/O ports in the 8051 microcontroller?

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Q. ROM is used for storing data storage.

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Q. SCON in serial port is used for which operation?

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Q. Program counter stores what?

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Q. Auxiliary carry is set during which condition?

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Q. What is order of the assembly and running 8051 program?

i) Myfile.asm
ii) Myfile.lst
iii) Myfile.obj
iv) Myfile.hex

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Q. The use of Address Latch Enable is to multiplex address and data memory.

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Q. Which pin provides a reset option in 8051?

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Q. External Access is used to permit ____________

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Q. What is the address range of SFRs?

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Q. How many interrupts are there in micro controller?

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Q. Timer 0 is a ________ bit register.

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Q. Number of pins in 8051 microcontroller with ________ package.

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Q. A 8051 microcontroller need external oscillator to run.

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Q. We use any other frequency source other than crystal oscillator.

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Q. Reset work is __________

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Q. What is the minimum no of cycles required for reset operation?

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Q. PSEN stands for ________

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Q. Find the machine cycle for AT89C51 if XTAL = 11.0592MHz.

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