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Microcontrollers Questions Set 29:

Quiz Mode

Which ports have the physical addresses as 90h and A0h?

P0, P1

P1, P2

P0,P2

P2, P3

Solution:

How many pages are there in the 8051 microcontroller's program memory ?

Solution:

What is the file extension that is loaded in a microcontroller for executing any instruction?

.doc

.obj

.hex

Solution:

An Assembly language instruction consists of a , optionally followed by one or two operands.

Solution:

Which member of the 8051 microcontroller family has 256 bytes of user-accessible RAM?

8031

8051

8052

None of the above

Solution:

Choose the INCORRECT instruction among the following. 1. XCH A, R3 2. XCH A, @R1 3. XCH A, 54 4. XCH R1, R0

Solution:

In which mode is the clock signal disabled to all parts of the 8051 microcontroller?

Payload mode

Idle mode

Power down mode

Power safety mode

Solution:

The transmission unit does not require assistance from the processor if a byte for transmission is written to which register?

SCON register

SBUF register

SFR address

none of the above

Solution:

What does the RLA instruction do?

Rotates the address register to the left

Rotates the accumulator to the left

Rotates the address register to the right

Rotates the accumulator to the right

Solution:

Which of the following statements about Microcontrollers is UNTRUE?

They can execute a single task within an application

They consist of CPU, RAM, ROM and I/O Ports

Their power consumption is very high

They are built using CMOS technology

Microcontrollers Questions Set 29:

Which ports have the physical addresses as 90h and A0h?

Solution:

How many pages are there in the 8051 microcontroller's program memory ?

Solution:

What is the file extension that is loaded in a microcontroller for executing any instruction?

Solution:

An Assembly language instruction consists of a , optionally followed by one or two operands.

Solution:

Which member of the 8051 microcontroller family has 256 bytes of user-accessible RAM?

Solution:

Choose the INCORRECT instruction among the following. 1. XCH A, R3 2. XCH A, @R1 3. XCH A, 54 4. XCH R1, R0

Solution:

In which mode is the clock signal disabled to all parts of the 8051 microcontroller?

Solution:

The transmission unit does not require assistance from the processor if a byte for transmission is written to which register?

Solution:

What does the RLA instruction do?

Solution:

Which of the following statements about Microcontrollers is UNTRUE?

Solution:

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