The 8051 Microcontroller - Practice Questions

Question 1

Writing counter/loop programs is much more difficult with the introduction of the DJNA and the CJNE instructions.

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Question 2

When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:

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Question 3

The 8051 is a 40-pin IC. Twenty-two pins are needed for the four I/O ports.

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Question 4

An alternate function of port pin P3.0 (RXD) in the 8051 is:

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Question 5

The total external data memory that can be interfaced to the 8051 is:

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Question 6

Microcontrollers often have:

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Question 7

The RST pin requires a HIGH to reset the 8051 microcontroller.

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Question 8

Which of the following instructions will load the value 35H into the high byte of timer 0?

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Question 9

Which of the following instructions will move the contents of register 3 to the accumulator?

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Question 10

MOV A, @ R1 will:

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