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Overview

ATtiny261A/461A/861A are low-power CMOS 8-bit microcontrollers based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the devices achieve throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

Features

? High Performance, Low Power AVR? 8-Bit Microcontroller

? Advanced RISC Architecture

– 123 Powerful Instructions – Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 20 MIPS Throughput at 20 MHz

? High Endurance Non-volatile Memory Segments

– 2/4/8K Bytes of In-System Self-Programmable Flash Program Memory

? Endurance: 10,000 Write/Erase Cycles

– 128/256/512 Bytes of In-System Programmable EEPROM

? Endurance: 100,000 Write/Erase Cycles

– 128/256/512 Bytes of Internal SRAM

– Data retention: 20 Years at 85°C / 100 Years at 25°C

– In-System Programmable via SPI Port

– Programming Lock for Software Security

? Peripheral Features

– One 8/16-bit Timer/Counter with Prescaler

– One 8/10-bit High Speed Timer/Counter with Prescaler

? 3 High Frequency PWM Outputs with Separate Output Compare Registers

? Programmable Dead Time Generator

– 10-bit ADC

? 11 Single-Ended Channels

? 16 Differential ADC Channel Pairs

? 15 Differential ADC Channel Pairs with Programmable Gain (1x, 8x, 20x, 32x)

– On-Chip Analog Comparator

– Programmable Watchdog Timer with Separate On-Chip Oscillator

– Universal Serial Interface with Start Condition Detector

– Interrupt and Wake-up on Pin Change

? Special Microcontroller Features

– debugWIRE On-Chip Debug System

– Power-on Reset and Programmable Brown-out Detection

– Internal Calibrated Oscillator

– External and Internal Interrupt Sources

– Four Sleep Modes: Low Power Idle, ADC Noise Reduction, Standby and Power Down

– On-Chip Temperature Sensor

? I/O and Packages

– 16 Programmable I/O Lines

– 20-pin PDIP, 20-pin SOIC, 20-pin TSSOP and 32-pad MLF

? Operating Voltage

– 1.8 – 5.5V

? Speed Grades

– 0 – 4 MHz @ 1.8 – 5.5V

– 0 – 10 MHz @ 2.7 – 5.5V

– 0 – 20 MHz @ 4.5 – 5.5V

? Power Consumption at 1 MHz, 1.8V, 25°C

– Active: 200 μA

– Power-Down Mode: 0.1 μA