The document discusses the course outline for a class on microprocessors and microcontrollers. It covers five units: Unit I discusses the 8085 processor, including its hardware architecture, pinouts, functional blocks, memory organization, I/O ports, data transfer concepts, and timing diagrams. Unit II covers programming the 8085 processor, including instruction formats, assembly language, data manipulation instructions, programming loops and tables, subroutines, and stacks. Unit III presents the 8051 microcontroller, comparing its hardware architecture, memory organization, I/O ports, interrupts and instructions to the 8085. Unit IV looks at peripheral interfacing with ICs like 8255, 8259, 8254 and

1. EE8551
MICROPROCESSORS
AND
MICROCONTROLLERS
Dr.P.NARASIMMAN
AP/EEE
Kings College of Engineering

2. UNIT I 8085 PROCESSOR
Hardware Architecture, pinouts — Functional Building
Blocks of Processor — Memory organization — I/O ports
and data transfer concepts– Timing Diagram —
Interrupts.
UNIT II PROGRAMMING OF 8085 PROCESSOR
Instruction -format and addressing modes — Assembly
language format — Data transfer, data
manipulation& control instructions — Programming:
Loop structure with counting & Indexing —
Look up tability — Subroutine instructions — stack.

3. UNIT III 8051 MICRO CONTROLLER
Hardware Architecture, pin outs — Functional Building Blocks of
Processor — Memory organization — I/O ports and data transfer
concepts– Timing Diagram — Interrupts- Data Transfer,
Manipulation, Control Algorithms& I/O instructions, Comparison
to Programming concepts with 8085.
UNIT IV PERIPHERAL INTERFACING
Study on need, Architecture, configuration and interfacing, with
ICs: 8255, 8259, 8254, 8279, — A/D and D/A converters
&Interfacing with 8085& 8051.
UNIT V MICRO CONTROLLER PROGRAMMING &
APPLICATIONS
Simple programming exercises- key board and display interface –
Control of servo motor stepper motor control- Application to
automation systems.

4. UNIT I
8085 PROCESSOR
Hardware Architecture, pinouts - Functional
Building Blocks of Processor - Memory
organization - I/O ports and data transfer
concepts– Timing Diagram - Interrupts.

5. INTRODUCTION
Bit: A bit is a single binary digit.
Word: A word refers to the basic data size or bit size that can be
processed by the arithmetic and logic unit of the processor. A 16-
bit binary number is called a word in a 16-bit processor.
Memory Word: The number of bits that can be stored in a register
or memory element is called a memory word.
Bus: A bus is a group of wires (lines) that carry similar
information.
System Bus: A system bus is a group of wires used for
communication between the microprocessor and peripherals.

6. Address Bus: It carries the address, which is a
unique binary pattern used to identify a memory
location or an I/O port.
Data Bus: The data bus is used to transfer data
between memory and processor or between I/O
device and processor.
Control Bus: The control bus carries control
signals, which consist of signals for selection of
memory or I/O device from the given address,
direction of data transfer, and synchronization of
data transfer in case of slow devices.

7. What is 8085 Microprocessor?
 It has 8 bit data bus and 16 bit address bus, thus it
is capable of addressing 64 KB of memory.
 It has 8 bit ALU 8 bit ALU that can perform 8 bit
operations.
 Lower order address bus is multiplexed with data bus
to minimize the chip size.
 The 8085 microprocessor is an 8-bit processor
available as a 40-pin IC package (shown the figure
below) and uses +5 V for power. It can run at a
maximum frequency of 3 MHz.

8. Internal Architecture of 8085
Microprocessor