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Microcontrollers Questions Set 5:

Quiz Mode

Which register is used in the baud rate selection ?

PCON

Solution:

Among the four groups of register banks, the number of groups that can be accessed at a time is:

Solution:

The RESET values of PSW, SP and P0-P3 are respectively:

00H, 07H, FFH

00H, 08H, FFH

FFH, 08H, 00H

Solution:

When the microcontroller executes arithmetic operations, which register's flag bits are affected?

DPTR

PSW

Solution:

Which of the following instructions provide the 2's complement of a value stored in register A?

CPL A XRL A, 01H

CPL A ADD A, #01

ADD A, #01H CPL A

XRL A, 01H ADD A, 01H

Solution:

The LSB of the pcon register is 1 in the 8051 microcontroller, then choose the correct option.

the uC is power down mode

the uC is in multiprocessor bit mode

the uC is in 9 bit UART mode.

the uC is in ideal mode

Solution:

If a memory has 32,768 locations, each of 32 bits, how many address and data lines are required?

14 address lines, 32 data lines

15 address lines, 5 data lines

15 address lines, 32 data lines

14 address lines, 5 data lines

Solution:

Which of the following is true about multiplexing in 8051 microcontroller?

A0-A15 and D0-D15 are multiplexed, to form AD0-AD15

If ALE = 1, bus carries data else address.

ALE is used to identify whether the bus carries address or data.

Options 2 and 3 are correct.

All of the Above

Solution:

Which of the following is/are correct reasons for incrementing the stack pointer after a PUSH operation?

It makes it easy to access the contents in the stack, as they are one above the other.

To ensure that the stack will not reach the bottom of RAM and consequently run out of space.

Both 1 and 2.

None of the above.

Solution:

Which of the following statement/s is/are true about the checksum byte?

The process of checksum will detect corruption of the content of RAM.

The checksum will detect any corruption of the contents of ROM.

The checksum byte is an extra byte that is tagged at the beginning of a series of bytes of data.

The checksum will detect any corruption of the contents of ROM.

Microcontrollers Questions Set 5:

Which register is used in the baud rate selection ?

Solution:

Among the four groups of register banks, the number of groups that can be accessed at a time is:

Solution:

The RESET values of PSW, SP and P0-P3 are respectively:

Solution:

When the microcontroller executes arithmetic operations, which register's flag bits are affected?

Solution:

Which of the following instructions provide the 2's complement of a value stored in register A?

Solution:

The LSB of the pcon register is 1 in the 8051 microcontroller, then choose the correct option.

Solution:

If a memory has 32,768 locations, each of 32 bits, how many address and data lines are required?

Solution:

Which of the following is true about multiplexing in 8051 microcontroller?

Solution:

Which of the following is/are correct reasons for incrementing the stack pointer after a PUSH operation?

Solution:

Which of the following statement/s is/are true about the checksum byte?

Solution:

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