ATTINY261-15MAZ View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATTINY261-15MAZ

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

Atmel Corporation 

2. Overview

The ATtiny261/461/861 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

ATtiny261/461/861 achieves throughputs approaching 1 MIPS per MHz allowing the system

designer to optimize power consumption versus processing speed.

2.1 Block Diagram

Figure 2-1. Block Diagram

Watchdog

Timer

Watchdog

Oscillator

Oscillator

Circuits /

Clock

Generation

EEPROM

Power

Supervision

POR / BOD &

RESET

Flash

debugWIRE

PROGRAM

LOGIC

SRAM

CPU

Timer/Counter0

Timer/Counter1

A/D Conv.

USI

Analog Comp.

Internal

Bandgap

AVCC

AGND

AREF

3

11

PORT B (8)

PORT A (8)

PB[0..7]

PA[0..7]

RESET

XTAL[1..2]

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.

4 ATtiny261/ATtiny461/ATtiny861

7753C–AVR–07/09

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