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ATMEGA323L Datasheet(PDF) 3 Page - ATMEL Corporation |
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ATMEGA323L Datasheet(HTML) 3 Page - ATMEL Corporation |
3 / 247 page 3 ATmega323(L) 1457G–AVR–09/03 Overview The ATmega323 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega323 achieves throughputs approaching 1 MIPS per MHz allowing the sys- tem designer to optimize power consumption versus processing speed. Block Diagram Figure 1. Block Diagram PROGRAM COUNTER INTERNAL OSCILLATOR WATCHDOG TIMER STACK POINTER PROGRAM FLASH MCU CONTROL REGISTER SRAM GENERAL PURPOSE REGISTERS INSTRUCTION REGISTER TIMER/ COUNTERS INSTRUCTION DECODER DATA DIR. REG. PORTB DATA DIR. REG. PORTA DATA DIR. REG. PORTD DATA DIR. REG. PORTC DATA REGISTER PORTB DATA REGISTER PORTA ANALOG MUX ADC DATA REGISTER PORTD DATA REGISTER PORTC PROGRAMMING LOGIC TIMING AND CONTROL OSCILLATOR OSCILLATOR INTERRUPT UNIT EEPROM SPI USART STATUS REGISTER Z Y X ALU PORTB DRIVERS PORTA DRIVERS PORTD DRIVERS PORTC DRIVERS PB0 - PB7 PA0 - PA7 RESET VCC AVCC AGND AREF GND XTAL2 XTAL1 CONTROL LINES PD0 - PD7 PC0 - PC7 8-BIT DATA BUS INTERNAL REFERENCE INTERNAL CALIBRATED OSCILLATOR 2-WIRE SERIAL INTERFACE JTAG INTERFACE |
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