ATTINY43U View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATTINY43U

8-bit Microcontroller with 4K Bytes In-System Programmable Flash and Boost Converter

Atmel Corporation 

2. Overview

The ATtiny43U 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 ATtiny43U achieves

throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power con-

sumption versus processing speed.

Figure 2-1. Block Diagram

VCC

RESET

VBAT

LSW

GND

BOOST

CONVERTER

PROGRAMMING

LOGIC

PROGRAM

FLASH

INSTRUCTION

REGISTER

INSTRUCTION

DECODER

CONTROL

LINES

ON-CHIP

DEBUG

ISP

INTERFACE

POWER

SUPERVISION

POR

BOD

RESET

PROGRAM

COUNTER

STACK

POINTER

SRAM

GENERAL

PURPOSE

REGISTERS

X

Y

Z

ALU

STATUS

REGISTER

INTERNAL

OSCILLATOR

WATCHDOG

TIMER

MCU CONTROL

REGISTER

MCU STATUS

REGISTER

TIMER/

COUNTER0

TIMER/

COUNTER1

INTERRUPT

UNIT

EEPROM

USI

CALIBRATED

OSCILLATOR

TIMING AND

CONTROL

ANALOG

COMPARATOR

VOLTAGE

REFERENCE

ADC

DATA REGISTER

PORT A

DIRECTION REG.

PORT A

DRIVERS

PORT A

DATA REGISTER

PORT B

DIRECTION REG.

PORT B

DRIVERS

PORT B

PA[7:0]

PB[7:0]

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

4 ATtiny43U

8048C–AVR–02/12

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