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ATmega8A-MU Datasheet(PDF) 3 Page - ATMEL Corporation |
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ATmega8A-MU Datasheet(HTML) 3 Page - ATMEL Corporation |
3 / 307 page 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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