[ELEX] MICROPROCCESSORS & MICROCONTROLLERS

Question 1

A system must have at least one input, one output and must do something.

Answer 1

System

Question 2

is a programmable, multipurpose, clock-driven, register-based electronic device that reads binary instructions, accepts binary data as input and processes data according to these instructions and provides result as ouput.

Answer 2

Microprocessor

Question 3

It performs all processes related to arithmetic and logic operations that need to be done on instruction words.

Answer 3

Arithmetic Logic Unit (ALU)

Question 4

This is basically addition and subtraction.

Answer 4

Arithmetic Operations

Question 5

This includes NOR, NOT, OR, XOR etc.

Answer 5

Logic Operations

Question 6

This entails shifting the position of bits by a certain number of places to either the right or left, which is considered a multiplication operation.

Answer 6

Bit Shifting Operations

Question 7

It happens when the largest number that a device can hold is exceeded.

Answer 7

Overflow Error

Question 8

are storage areas inside the microprocessor

Answer 8

Registers

Question 9

Holds the memory location of data that needs to be accessed

Answer 9

Memory Address Registers

Question 10

Holds data that is being transferred to or from memory

Answer 10

Memory Data Registers

Question 11

Contains the current instruction during processing

Answer 11

Current Instruction Registers

Question 12

Where intermediate arithmetic and logic results are stored

Answer 12

Accumulator

Question 13

Contains the address if the next instruction to be executed

Answer 13

Program Counter

Question 14

The code where all successive numbers differ from their preceding number by single bit is ____________

Answer 14

Gray

Question 15

Typical operating voltages of microprocessors are:

Answer 15

3.3V and 5V

Question 16

8085 is a/an ____-bit microproccessor

Answer 16

8

Question 17

The circuits in the 8085A that provide the arithmetic and logic functions are called the:

Answer 17

Arithmetic Logic Unit (ALU)

Question 18

It is a special-purpose register of microprocessor.

Answer 18

Program Counter

Question 19

Single-bit indicators that may be set or cleared to show the results of logical or arithmetic operations are the:

Answer 19

Flag

Question 20

A register in the microprocessor that keeps track of the answer or results of any arithmetic or logic operation is the:

Answer 20

Accumulator

Question 21

It stores bulk of data or information

Answer 21

Memory

Question 22

It stores binary data in arrays. The data can be addressed from anywhere in the matrix. It is sometimes called a read/write memory.

Answer 22

Random Access Memory

Question 23

Holds its values as long as power is on. Access times are very fast and it requires more components to do this, so it is more expensive and larger.

Answer 23

Static RAM

Question 24

Uses passive components that hold data values for only a few fractions of a second. It has low power consumption and cheaper price but slower access time.

Answer 24

Dynamic RAM

Question 25

For address inputs, where 11 address lines give 2^11 = 2K

Answer 25

A0-A10

Question 26

For reading data out of SRAM (active low)

Answer 26

Output Enable

Question 27

is used to select the memory chip

Answer 27

Chip Select

Question 28

are for data I/O, where 8-bit data lines give an organixation of 2K x 8

Answer 28

I/O0-I/O7

Question 29

are for address inputs, where 9 address lines, thus 2^(9x2) = 256K

Answer 29

A0-A8

Question 30

sent by the processor to a DRAM circuit to activate a column address

Answer 30

Column Address Strobe

Question 31

sent by the processor to a DRAM circuit to activate a row address

Answer 31

Row Address Strobe

Question 32

used to store information on a more-or-less permanent basis

Answer 32

Read-Only Memory (ROM)

Question 33

What does these stand for?

PROM:
EPROM:
UVPROM:
EEPROM:

Answer 33

Programmable ROM

Erasable Programmable ROM

Ultraviolet PROM

Electrically EPROM

Question 34

A0-A12

Question 35

For writing data into SRAM (active low)

Answer 35

Write Enable

Question 35

For writing data into SRAM (active low)

Answer 35

Write Enable

Question 36

For writing data into SRAM (active low)

Answer 36

Write Enable