Microprocessor and Microcontroller

1. EEET 323
Microprocessor and Microcontroller
Engr.Imran Fazal
Office Location Library Room No:108

2. Text Books
• Microprocessor Architecture Programming
and Application with 8085 by Ramesh S.
Goankar (5th Edition)
• The 8051 Microcontroller Architecture
Programing and Applications by Kanneth J
Ayala (2nd Edition)

3. Course Outline
• Microprocessor Fundamentals
• 8085 Instruction set and Programming
• Microprocessor Interfacing and Application
• Architecture of 8051 Microcontroller
• 8051 Instruction set, Programming Interfacing
and Application.
• Intel 80x86 Family of Microprocessor
• Superscaler and Itanium Processor

4. Introduction to Microprocessor
It is multipurpose programmable ,clock driven
register based electronic device that reads
binary instruction from a storage (Memory)
It takes binary data as input process data
according to those instructions from storage
and provides results as output.

5. µcomputer
it consists of input unit central processing unit memory and
output unit
µprocessor
it is the central processing unit it can not work stand
alone
µcontroller
it is stand alone system that means memory and supporting
devices are on chip

6. µcomputer

7. µprocessor

8. µcontroller

9. Hardware and Software
• Hardware: The physical parts of the
computers are hardware that are screen
printer cpu, RAM ROM
• Software: The non physical parts of the
computers are software that are Windows,
word, excel or assembly programs instruction
data.

10. Tri State Logic
• In digital electronics there are two logics that are
0 or 1 for single line system
• WHEN THE SINGLE LINE IS SHARED BY VARIOUS
DIGITAL COMPONENTS
• The out put on the Shared LINE will destroyed
AND OUTPUT WILL BE UNPREDICTABLE
• A tri-state output has the same high and low
levels as standard logic outputs but it has a third
state, namely high impedance
• A high impedance state means that the output is
not transferred to the line

11. Buses
• Address Bus
• Data Bus
• Control Bus

12. 8085 Buses
• Address Bus: It is a group of wires or lines that are used to transfer the addresses
of Memory or I/O devices. It is unidirectional. In Intel 8085 microprocessor,
Address bus was of 16 bits. This means that Microprocessor 8085 can transfer
maximum 16 bit address which means it can address (2^16 = 65,536) different
memory locations. This bus is multiplexed with 8 bit data bus. So the most
significant bits (MSB) of address goes through Address bus (A7-A0) and LSB goes
through multiplexed data bus (AD0-AD7).
Data Bus: As name tells that it is used to transfer data within Microprocessor and
Memory/Input or Output devices. It is bidirectional as Microprocessor requires to
send or receive data. The data bus also works as address bus when multiplexed
with lower order address bus. Data bus is 8 Bits long. The word length of
a processor depends on data bus, thats why Intel 8085 is called 8 bit
Microprocessor because it have an 8 bit data bus.
Control Bus: Microprocessor uses control bus to process data, that is what to do
with the selected memory location. Some control signals are Read, Write and
Opcode fetch etc. Various operations are performed by microprocessor with the
help of control bus. This is a dedicated bus, because all timing signals are
generated according to control signal.

13. 8085

14. Signals and I/O Pins

15. 8085 Microprocessor