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ATmega8A-MU Datasheet(PDF) 3 Page - ATMEL Corporation

Part # ATmega8A-MU
Description  8-bit with 8K Bytes In-System Programmable Flash
Download  307 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega8A-MU Datasheet(HTML) 3 Page - ATMEL Corporation

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3
8159C–AVR–07/09
ATmega8A
2.
Overview
The ATmega8A is a low-power CMOS 8-bit microcontroller based on the AVR RISC architec-
ture. By executing powerful instructions in a single clock cycle, the ATmega8A achieves
throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power con-
sumption versus processing speed.
2.1
Block Diagram
Figure 2-1.
Block Diagram
INTERNAL
OSCILLATOR
OSCILLATOR
WATCHDOG
TIMER
MCU CTRL.
& TIMING
OSCILLATOR
TIMERS/
COUNTERS
INTERRUPT
UNIT
STACK
POINTER
EEPROM
SRAM
STATUS
REGISTER
USART
PROGRAM
COUNTER
PROGRAM
FLASH
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
PROGRAMMING
LOGIC
SPI
ADC
INTERFACE
COMP.
INTERFACE
PORTC DRIVERS/BUFFERS
PORTC DIGITAL INTERFACE
GENERAL
PURPOSE
REGISTERS
X
Y
Z
ALU
+
-
PORTB DRIVERS/BUFFERS
PORTB DIGITAL INTERFACE
PORTD DIGITAL INTERFACE
PORTD DRIVERS/BUFFERS
XTAL1
XTAL2
CONTROL
LINES
VCC
GND
MUX &
ADC
AGND
AREF
PC0 - PC6
PB0 - PB7
PD0 - PD7
AVR CPU
TWI
RESET


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