ATTINY84A-SSU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATTINY84A-SSU

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

Atmel Corporation 

2. Overview

ATtiny24A/44A/84A are low-power CMOS 8-bit microcontrollers based on the AVR enhanced

RISC architecture. By executing powerful instructions in a single clock cycle, the

ATtiny24A/44A/84A achieves throughputs approaching 1 MIPS per MHz allowing the system

designer to optimize power consumption versus processing speed.

Figure 2-1.

VCC

GND

Block Diagram

PROGRAM

COUNTER

PROGRAM

FLASH

INSTRUCTION

REGISTER

INSTRUCTION

DECODER

CONTROL

LINES

8-BIT DATABUS

INTERNAL

OSCILLATOR

STACK

POINTER

SRAM

GENERAL

PURPOSE

REGISTERS

X

Y

Z

ALU

WATCHDOG

TIMER

MCU CONTROL

REGISTER

MCU STATUS

REGISTER

TIMER/

COUNTER0

TIMER/

COUNTER1

INTERNAL

CALIBRATED

OSCILLATOR

TIMING AND

CONTROL

STATUS

REGISTER

INTERRUPT

UNIT

PROGRAMMING

LOGIC

ISP INTERFACE

EEPROM

OSCILLATORS

DATA REGISTER

PORT A

DATA DIR.

REG.PORT A

ADC

DATA REGISTER

PORT B

DATA DIR.

REG.PORT B

PORT A DRIVERS

PORT B DRIVERS

PA[7:0]

PB[3:0]

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

4 ATtiny24A/44A/84A

8183FS–AVR–06/12

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