Basics of ATMega32

MCUNima Ghaedsharafi

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Key Features• High-performance

• Low-power

• 8-bit Microcontroller

• RISC Architecture

• 32Kbytes of In-System Self-programmable

• JTAG Interface

• 32 Programmable I/O Lines

• True Read-While-Write Operation

• Up to 16 MIPS Throughput

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DIP Mode

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MLF Mode

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Block Diagram

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Block Diagram Cont.

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Ports

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Ports• 8-bit bi-directional I/O port

• True Read-Modify-Write (digital I/O)

• internal pull-up resistors

• used as inputs and are externally pulled low

• tri-stated when a reset condition becomes active

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Same Same But Different PortA

• Analog input

• A/D Converter

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Same Same But Different PortB

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Same Same But Different PortC

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Same Same But Different PortD

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Reset• low level ( Negative Logic)

• longer than the minimum pulse length

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AVCC• supply voltage pin for Port A and the A/D Converter

• externally to VCC, even ADC is not used

• connected to VCC through a low-pass filter

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AREF• analog reference pin for the A/D Converter

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XTAL1 and XTAL2• input and output respectively,

• On-chip Oscillator

• Either a quartz crystal or a

ceramic resonator

• CKOPT is Programmedo full rail-to-rail swing

o Good For very Noisy Env

• CKOPT is Unprogrammedo Smaller output swing

o Reduces power consumption

• resonators, maximum Frequency o Ckopt Unprogrammed 8MHz

o Ckopt Programmed 16MHz

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Tools• Compiler : WinAVR/AVR Studio/CodeVision AVR

• Programmer Hardwareo Simple parallel/serial port based In System Programmer (ISP)

o USB based ISP (recommended) : USBasp

• Bread board, wires, power supply, crystal, etc.

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Any Question?!

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(Of Course not)