ATMEGA8 데이터 시트보기 (PDF) - Atmel Corporation

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ATMEGA8

8-bit Atmel with 8KBytes In-System Programmable Flash

Atmel Corporation 

ATmega8(L)

Overview

Block Diagram

The Atmel®AVR® ATmega8 is a low-power CMOS 8-bit microcontroller based on the AVR RISC

architecture. By executing powerful instructions in a single clock cycle, the ATmega8 achieves

throughputs approaching 1MIPS per MHz, allowing the system designer to optimize power con-

sumption versus processing speed.

Figure 1. Block Diagram

RESET

VCC

PC0 - PC6

PB0 - PB7

XTAL1

XTAL2

PORTC DRIVERS/BUFFERS

PORTB DRIVERS/BUFFERS

GND

PORTC DIGITAL INTERFACE

PORTB DIGITAL INTERFACE

AGND

AREF

MUX &

ADC

ADC

INTERFACE

PROGRAM

COUNTER

STACK

POINTER

PROGRAM

FLASH

SRAM

INSTRUCTION

REGISTER

INSTRUCTION

DECODER

CONTROL

LINES

AVR CPU

GENERAL

PURPOSE

REGISTERS

X

Y

Z

ALU

STATUS

REGISTER

PROGRAMMING

LOGIC

SPI

+

COMP.

-

INTERFACE

TWI

TIMERS/

COUNTERS

OSCILLATOR

INTERNAL

OSCILLATOR

WATCHDOG

TIMER

MCU CTRL.

& TIMING

INTERRUPT

UNIT

OSCILLATOR

EEPROM

USART

2486AA–AVR–02/2013

PORTD DIGITAL INTERFACE

PORTD DRIVERS/BUFFERS

PD0 - PD7

3

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