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ATmega8535(L)

Overview

Block Diagram

The ATmega8535 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing instructions in a single clock cycle, the ATmega8535 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Figure 2.

Block Diagram

 

 

 

 

 

PA0 - PA7

 

 

PC0 - PC7

 

VCC

 

 

 

 

 

 

PORTA DRIVERS/BUFFERS

PORTC DRIVERS/BUFFERS

 

GND

PORTA DIGITAL INTERFACE

PORTC DIGITAL INTERFACE

 

AVCC

 

 

 

 

 

 

MUX &

ADC

TWI

 

 

 

INTERFACE

 

 

 

ADC

 

 

 

 

 

 

 

 

AREF

 

 

 

 

 

 

PROGRAM

STACK

TIMERS/

OSCILLATOR

 

 

COUNTERS

 

 

 

 

 

COUNTER

POINTER

 

 

 

 

 

 

 

PROGRAM

SRAM

INTERNAL

 

 

 

FLASH

OSCILLATOR

 

 

 

 

 

 

 

 

 

 

 

XTAL1

 

INSTRUCTION

GENERAL

WATCHDOG

OSCILLATOR

 

 

REGISTER

TIMER

 

 

PURPOSE

 

 

 

 

 

 

REGISTERS

 

 

 

 

 

X

 

 

XTAL2

 

 

 

 

 

 

INSTRUCTION

Y

MCU CTRL.

 

RESET

 

DECODER

& TIMING

 

 

 

 

 

 

 

Z

 

 

 

CONTROL

 

INTERRUPT

INTERNAL

 

CALIBRATED

LINES

ALU

UNIT

OSCILLATOR

 

 

 

AVR CPU

STATUS

EEPROM

 

REGISTER

 

 

 

 

PROGRAMMING

SPI

USART

 

LOGIC

 

 

 

 

+

COMP.

 

 

-

INTERFACE

 

 

PORTB DIGITAL INTERFACE

 

PORTD DIGITAL INTERFACE

 

 

 

 

 

 

PORTB DRIVERS/BUFFERS

 

PORTD DRIVERS/BUFFERS

 

 

 

PB0 - PB7

PD0 - PD7

3

2502F–AVR–06/04