ATtiny45-15ST1 datasheet(3/196 Pages) ATMEL

Part #	ATtiny45-15ST1

Description	8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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3

7598H–AVR–07/09

ATtiny25/45/85

2.1

Block Diagram

Figure 2-1.

Block Diagram

The AVR core combines a rich instruction set with 32 general purpose working registers. All the

32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent

registers to be accessed in one single instruction executed in one clock cycle. The resulting

architecture is more code efficient while achieving throughputs up to ten times faster than con-

ventional CISC microcontrollers.

PROGRAM

COUNTER

INTERNAL

OSCILLATOR

WATCHDOG

TIMER

STACK

POINTER

PROGRAM

FLASH

SRAM

MCU CONTROL

REGISTER

GENERAL

PURPOSE

REGISTERS

INSTRUCTION

REGISTER

TIMER/

COUNTER0

SERIAL

UNIVERSAL

INTERFACE

TIMER/

COUNTER1

INSTRUCTION

DECODER

DATA DIR.

REG.PORT B

DATA REGISTER

PORT B

PROGRAMMING

LOGIC

TIMING AND

CONTROL

MCU STATUS

REGISTER

STATUS

REGISTER

ALU

PORT B DRIVERS

PB0-PB5

VCC

GND

CONTROL

LINES

8-BIT DATABUS

Z

ADC /

ANALOG COMPARATOR

INTERRUPT

UNIT

DATA

EEPROM

CALIBRATED

OSCILLATORS

Y

X

RESET

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ATtiny45-15ST1 Datasheet(PDF) 3 Page - ATMEL Corporation

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