Overview
The ATtiny11/12 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATtiny11/12 achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed.
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 conventional CISC microcontrollers.

Features
• Utilizes the AVR® RISC Architecture
• High-performance and Low-power 8-bit RISC Architecture
   – 90 Powerful Instructions – Most Single Clock Cycle Execution
   – 32 x 8 General Purpose Working Registers
   – Up to 8 MIPS Throughput at 8 MHz
• Nonvolatile Program and Data Memory
   – 1K Byte of Flash Program Memory
      In-System Programmable (ATtiny12)
      Endurance: 1,000 Write/Erase Cycles (ATtiny11/12)
   – 64 Bytes of In-System Programmable EEPROM Data Memory for ATtiny12
      Endurance: 100,000 Write/Erase Cycles
   – Programming Lock for Flash Program and EEPROM Data Security
• Peripheral Features
   – Interrupt and Wake-up on Pin Change
   – One 8-bit Timer/Counter with Separate Prescaler
   – On-chip Analog Comparator
   – Programmable Watchdog Timer with On-chip Oscillator
• Special Microcontroller Features
   – Low-power Idle and Power-down Modes
   – External and Internal Interrupt Sources
   – In-System Programmable via SPI Port (ATtiny12)
   – Enhanced Power-on Reset Circuit (ATtiny12)
   – Internal Calibrated RC Oscillator (ATtiny12)
• Specification
   – Low-power, High-speed CMOS Process Technology
   – Fully Static Operation
• Power Consumption at 4 MHz, 3V, 25°C
   – Active: 2.2 mA
   – Idle Mode: 0.5 mA
   – Power-down Mode: <1 µA
• Packages
   – 8-pin PDIP and SOIC
• Operating Voltages
   – 1.8 - 5.5V for ATtiny12V-1
   – 2.7 - 5.5V for ATtiny11L-2 and ATtiny12L-4
   – 4.0 - 5.5V for ATtiny11-6 and ATtiny12-8
• Speed Grades
   – 0 - 1.2 MHz (ATtiny12V-1)
   – 0 - 2 MHz (ATtiny11L-2)
   – 0 - 4 MHz (ATtiny12L-4)
   – 0 - 6 MHz (ATtiny11-6)
   – 0 - 8 MHz (ATtiny12-8)