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ATMega32 - 8-Bit AVR Microcontroller

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ATMEGA32 Pin Configuration

Pin No.

Pin name

Description

Alternate Function

1

PB0(XCK/T0)

Pin 0 of  PORTB

T0( Timer0 External Counter Input)

XCK ( USART External Clock I/O)

2

PB1(T1)

Pin 1 of  PORTB

T1(Timer1 External Counter Input)

3

PB2(INT2/AIN0)

Pin 2 of  PORTB

AIN0(Analog Comparator Positive I/P)

INT2( External Interrupt 2 Input)

4

PB3(OC0/AIN1)

Pin 3 of  PORTB

AIN1(Analog Comparator Negative I/P)

OC0 (Timer0 Output Compare Match Output)

5

PB4(SS)

Pin 4 of  PORTB

SS (SPI Slave Select Input).  This pin is low when controller acts as slave.

 

[Serial Peripheral Interface (SPI) for programming]

6

PB5(MOSI)

Pin 5 of  PORTB

 MOSI (Master Output Slave Input). When controller acts      as slave, the data is received by this pin.

[Serial Peripheral Interface (SPI) for programming]

7

PB6(MISO)

Pin 6 of  PORTB

 MISO (Master Input Slave Output). When controller acts as slave, the data is sent to master by this controller through this pin.

 

  [Serial Peripheral Interface (SPI) for programming]

8

PB7(SCK)

Pin 7 of  PORTB

 SCK (SPI Bus Serial Clock). This is the clock shared between this controller and other system for accurate data transfer.

[Serial Peripheral Interface (SPI) for programming]

9

RESET

Reset Pin, Active Low Reset

Pulled HIGH to RESET controller.

10

Vcc

Vcc = +5V

 

11

GND

GROUND

 

12

XTAL2

Connected to Crystal Oscillator

 

13

XTAL1

Connected to Crystal Oscillator

 

14

PD0(RXD)

Pin 0 of  PORTD

RXD (USART Input Pin)

 

USART Serial Communication Interface

[Can be used for programming]

15

PD1(TXD)

Pin 1 of  PORTD

  TXD (USART Output Pin)

 

USART Serial Communication Interface

[Can be used for programming]

16

PD2(INT0)

Pin 2 of  PORTD

External Interrupt INT0

17

PD3(INT1)

Pin 3 of  PORTD

External Interrupt INT1

18

PD4(OC1B)

Pin 4 of  PORTD

PWM Channel Outputs

19

PD5(OC1A)

Pin 5 of  PORTD

20

PD6(ICP)

Pin 6 of  PORTD

Timer/Counter1 Input Capture Pin

21

PD7 (OC2)

Pin 7 of  PORTD

Timer/Counter2 Output Compare Match Output

22

PC0 (SCL)

Pin 0 of  PORTC

TWI Interface

23

PC1 (SDA)

Pin 1 of  PORTC

24

PC2 (TCK)

Pin 2 of  PORTC

JTAG Interface

25

PC3 (TMS)

Pin 3 of  PORTC

26

PC4 (TDO)

Pin 4 of  PORTC

27

PC5 (TDI)

Pin 5 of  PORTC

28

PC6 (TOSC1)

Pin 6 of  PORTC

Timer Oscillator Pin 1

29

PC7 (TOSC2)

Pin 7 of  PORTC

Timer Oscillator Pin 2

30

AVcc

Vcc for Internal ADC  Converter

31

GND

GROUND

32

AREF

Analog Reference Pin for ADC

33

PA7 (ADC7)

Pin 7 of  PORTA

ADC (Analog to Digital Converter) Channel 7

34

PA6 (ADC6)

Pin 6 of  PORTA

ADC (Analog to Digital Converter) Channel 6

35

PA5 (ADC5)

Pin 5 of  PORTA

ADC (Analog to Digital Converter) Channel 5

36

PA4 (ADC4)

Pin 4 of  PORTA

ADC (Analog to Digital Converter) Channel 4

37

PA3 (ADC3)

Pin 3 of  PORTA

ADC (Analog to Digital Converter) Channel 3

38

PA2 (ADC2)

Pin 2 of  PORTA

ADC (Analog to Digital Converter) Channel 2

39

PA1 (ADC1)

Pin 1 of  PORTA

ADC (Analog to Digital Converter) Channel 1

40

PA0 (ADC0)

Pin 0 of  PORTA

ADC (Analog to Digital Converter) Channel 0

         

 

ATMEGA32 Features

ATMEGA32 – Simplified Features

CPU

8-bit AVR

Number of Pins

40

Operating Voltage (V)

+4.5 to +5.5 V (+5.5V being absolute maximum)

Number of I/O pins

32

Communication Interface

JTAG Interface(24,25,26,27 PINS)[Can be used for programming this controller]

Master/Slave SPI Serial Interface(5,6,7,8 PINS) [Can be used for programming this controller]

Programmable Serial USART(14,15 PINS) [Can be used for programming this controller]

Two-wire Serial Interface(22,23 PINS)[Can be used to connect peripheral devices like sensors and LCDs]

ADC Module

8 channels , 10-bit resolution ADC

Timer Module

Two 8-bit counters, One 16-bit counter [Total three]

Analog Comparators

1

DAC Module

Nil

PWM channels

4

External Oscillator

0-8MHz for ATMEGA32L

0-16MHz for ATMEGA32

Internal Oscillator

0-8MHz  Calibrated Internal Oscillator

Program Memory Type

Flash

Program Memory (KB)

32Kbytes[10000 write/erase cycles]

CPU Speed (MIPS)

16 MIPS

RAM Bytes

2KBytes

Data EEPROM

1024 Bytes

Watchdog Timer

 Programmable Watchdog Timer with Separate On-chip  Oscillator

Power Save Modes

Six Modes[Idle, ADC Noise Reduction, Power-save, Power-down, Standby and Extended Standby]

Operating Temperature

-55°C to +125°C(+125 being absolute maximum, -55 being absolute minimum)

   

 

ATMEGA32 Replacements

ATMEGA16, ATMEGA8535

 

ATMEGA32 Alternatives

ATMEGA8, ATMEGA328p

 

Where to Use ATMEGA32

ATMEGA32 is easy to program AVR controller. With appreciable program memory it can satisfy most EMBEDDED SYSTEMS. With various sleep modes it can work on MOBILE EMBEDDED SYSTEMS. Along with 32 programmable Input/Output pins, it can interface many peripherals easily. With Watchdog timer to reset under error it can be used on systems with no human interference.  With so many features with each appreciating other we can implement ATMEGA32 in many control systems.

 

How to Use ATMEGA32

Using ATMEGA32 is similar to any other microcontroller. Similar to them it is not Plug and Play digital ICs. For working of ATMEGA32, first we need to save the appropriate program file in the ATMEGA32 FLASH memory. After dumping this program code, the controller executes this code to create the response.

 

Entire process of using an ATMEGA32 goes like this:

  1. List the functions to be executed by ATMEGA32
  2. write the functions in IDE programs using relative language

(Usually Atmel Studio 6.2 for Windows7,

 Atmel Studio 7 for Windows10 [ https://www.microchip.com/avr-support/atmel-studio-7 ])

(For these IDE the functions should be written in ‘C’ language)

  1. After writing the desired program compile for error elimination using IDE.
  2. Opt the IDE application to generate HEX file for the written program.
  3. Choose the programming device (usually SPI programmer made for AVR controllers) which establishes communication between PC and ATMEGA32
  4. Run the HEX file dumping software which is related to the chosen programming device.
  5. Choose the appropriate program HEX file in the SPI or other programmer software.
  6. Burn the HEX file of program in ATMEGA32 flash memory using this program.
  7. Disconnect the programmer, connect the appropriate peripherals for the controller and power the sytem.

 

Applications

There are thousands of applications for ATMEGA32.

  • Temperature control systems
  • Analog signal measuring and manipulations.
  • Embedded systems like coffee machine, vending machine.
  • Motor control systems.
  • Digital signal processing.
  • Peripheral Interface system.

 

2D Model

ATmega32 Dimensions





Download Datasheet PDF:
ATMega32 Microcontroller Datasheet