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Microcontrollers Questions Set 12:

Quiz Mode

What voltage levels are used for binary 0 in RS-232?

-3 to -25 V

0 to +3 V

+3 to +25 V

-3 to 0 V

Solution:

Which of the following microcontrollers has 8 interrupt sources?

8051

8052

8031

None of the above

Solution:

Which I/O port can be used for the higher address byte with addresses A8-A15?

PORT1

PORT2

PORT3

PORT4

Solution:

Which of the following values can be taken in a counter of 8051 microcontroller?

10010h

0F010h

01010h

00010h

Solution:

Which of the following is a branch instruction in the instruction set of 8051 microcontroller ?

ORG

ORL

NOP

JNC

Solution:

The TMOD register has inputs 1010 0011. Which of the following timer is functional here in the 8051 microcontroller ?

timer 0

timer 1

both

none

Solution:

Which addressing mode in the 8051 microcontroller uses the @ symbol ?

direct addressing

indirect addressing

relative addressing

absolute addressing

Solution:

What is the function of Pin No. 20 in the 8051 microcontroller pin configuration?

I/O port

Power Supply

Program Stable Enable

External Access Point

Solution:

What does UART stands for, in the serial communication of 8051 microcontroller ?

Universal Astable Receiving Transmitter

Ultra asynchronous reciever transmitter

universal asynchronous receiver transmitter

none of the above

Solution:

Which of the following statements about the I/O port pins in an 8051 microcontroller is false?

The four 8-bit I/O ports P0, P1, P2, and P3 each use 8 pins.

When a 0 is first written to a port, it becomes an output.

To configure a port as an input, a 1 must be sent to it.

All ports are configured in the same way to act as input or output ports.

Microcontrollers Questions Set 12:

What voltage levels are used for binary 0 in RS-232?

Solution:

Which of the following microcontrollers has 8 interrupt sources?

Solution:

Which I/O port can be used for the higher address byte with addresses A8-A15?

Solution:

Which of the following values can be taken in a counter of 8051 microcontroller?

Solution:

Which of the following is a branch instruction in the instruction set of 8051 microcontroller ?

Solution:

The TMOD register has inputs 1010 0011. Which of the following timer is functional here in the 8051 microcontroller ?

Solution:

Which addressing mode in the 8051 microcontroller uses the @ symbol ?

Solution:

What is the function of Pin No. 20 in the 8051 microcontroller pin configuration?

Solution:

What does UART stands for, in the serial communication of 8051 microcontroller ?

Solution:

Which of the following statements about the I/O port pins in an 8051 microcontroller is false?

Solution:

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