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ATMEGA8 数据表(PDF) 3 Page - ATMEL Corporation |
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ATMEGA8 数据表(HTML) 3 Page - ATMEL Corporation |
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3 / 331 page  3 2486AA–AVR–02/2013 ATmega8(L) Overview 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. Block Diagram Figure 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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