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
