This document discusses the ATmega32 microcontroller. It provides details about the microcontroller, including that it is a small computer on a single integrated circuit containing a processor core, memory, and programmable I/O. It notes features of the ATmega32 such as its processing power, memory, programming capabilities, and peripherals. Example code is provided to control a stepper motor using the ATmega32 by setting the data direction registers and outputting different values to PORTB to rotate the motor in both directions.

1. MICROCONTROLLER
ATmega32
Saad Ahmed
BE(E)

2. What is Microcontroller ?
• A microcontroller is a small computer on a single
integrated circuit containing a processor core, memory,
and programmable input/output peripherals.

3. Types of Microcontrollers

4. AT mega 32
• ATMEL AVR chips pack lots of power (1MIPS/MHz, clocks up to 16MHz)
and space (up to 128K of flash program memory and 4K of EEPROM and
SRAM) at low prices.
• HLL Support, like C, helps increase reuse and reduce turn-around/debug
time/headaches.
• In-System Programmable flash--can easily program chips, even while in-
circuit.
• Many peripherals: a whole bunch of internal and external interrupt sources
and peripherals are available on a wide range of de-vices (timers, UARTs,
ADC, watchdog, etc.).
• 32 registers: The 32 working registers (all directly usable by the ALU) help
keep performance snappy, reducing the use of time-consuming RAM
access.

5. Basic Architecture

6. Pin Configuration

7. Instruction Set

8. Application(Stepper Motor)

9. Source code
#include<avr/io.h>
#include<util/delay.h>
void main()
{
DDRB=0b00001111;
while(1)
{
if(PIND==0b00000001)
{
PORTB=0b00000001;
_delay_ms(10);
PORTB=0b00000011;
_delay_ms(10);
PORTB=0b00000010;
_delay_ms(10);
PORTB=0b00000110;
_delay_ms(10);
PORTB=0b00000100;
_delay_ms(10);
PORTB=0b00001100;
_delay_ms(10);
PORTB=0b00001000;
_delay_ms(10);
PORTB=0b00001001;
_delay_ms(10);
}

10. Cont…
if(PIND==0b00000010)
{
PORTB=0b00001000;
_delay_ms(10);
PORTB=0b00001100;
_delay_ms(10);
PORTB=0b00000100;
_delay_ms(10);
PORTB=0b00000110;
_delay_ms(10);
PORTB=0b00000010;
_delay_ms(10);
PORTB=0b00000011;
_delay_ms(10);
PORTB=0b00000001;
_delay_ms(10);
PORTB=0b00001001;
_delay_ms(10);
}
DDRD=0b00010000;
}
}

11. Thank you