Overview
The ATtiny261/461/861 is a low-power CMOS 8-bit microcontroller
based on the AVR enhanced LButtonRISC 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.
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
• Non-volatile Program and Data Memories
– 2/4/8K Byte of In-System Programmable Program Memory Flash
(ATtiny261/461/861) Endurance: 10,000 Write/Erase Cycles
– 128/256/512 Bytes In-System Programmable EEPROM
(ATtiny261/461/861) Endurance: 100,000 Write/Erase Cycles
– 128/256/512 Bytes Internal SRAM (ATtiny261/461/861)
– Programming Lock for Self-Programming Flash Program and EEPROM
Data Security
• Peripheral Features
– 8/16-bit Timer/Counter with Prescaler and Two PWM Channels
– 8/10-bit High Speed Timer/Counter with Separate Prescaler
3 High Frequency PWM Outputs with Separate Output Compare Registers
Programmable Dead Time Generator
– Universal Serial Interface with Start Condition Detector
– 10-bit ADC
11 Single Ended Channels
16 Differential ADC Channel Pairs
15 Differential ADC Channel Pairs with Programmable Gain (1x, 8x,
20x, 32x)
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
• Special Microcontroller Features
– debugWIRE On-chip Debug System
– In-System Programmable via SPI Port
– External and Internal Interrupt Sources
– Low Power Idle, ADC Noise Reduction, and Power-down Modes
– Enhanced Power-on Reset Circuit
– Programmable Brown-out Detection Circuit
– Internal Calibrated Oscillator
• I/O and Packages
– 16 Programmable I/O Lines
– 20-pin PDIP, 20-pin SOIC and 32-pad MLF
• Operating Voltage:
– 1.8 - 5.5V for ATtiny261V/461V/861V
– 2.7 - 5.5V for ATtiny261/461/861
• Speed Grade:
– ATtiny261V/461V/861V: 0 - 4 MHz @ 1.8 - 5.5V, 0 - 10 MHz @ 2.7 -
5.5V
– ATtiny261/461/861: 0 - 10 MHz @ 2.7 - 5.5V, 0 - 20 MHz @ 4.5 -
5.5V
• Industrial Temperature Range
• Low Power Consumption
– Active Mode: 1 MHz, 1.8V: 380μA
– Power-down Mode: 0.1μA at 1.8V
