Overview
The ATtiny2313A/4313 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 ATtiny2313A/4313 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
   – 120 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
• Data and Non-volatile Program and Data Memories
   – 2/4K Bytes of In-System Self Programmable Flash
      • Endurance 10,000 Write/Erase Cycles
   – 128/256 Bytes In-System Programmable EEPROM
      • Endurance: 100,000 Write/Erase Cycles
   – 128/256 Bytes Internal SRAM
   – Programming Lock for Flash Program and EEPROM Data Security
• Peripheral Features
   – One 8-bit Timer/Counter with Separate Prescaler and Compare Mode
   – One 16-bit Timer/Counter with Separate Prescaler, Compare and Capture Modes
   – Four PWM Channels
   – On-chip Analog Comparator
   – Programmable Watchdog Timer with On-chip Oscillator
   – USI – Universal Serial Interface
   – Full Duplex USART
• Special Microcontroller Features
   – debugWIRE On-chip Debugging
   – In-System Programmable via SPI Port
   – External and Internal Interrupt Sources
   – Low-power Idle, Power-down, and Standby Modes
   – Enhanced Power-on Reset Circuit
   – Programmable Brown-out Detection Circuit
   – Internal Calibrated Oscillator
• I/O and Packages
   – 18 Programmable I/O Lines
   – 20-pin PDIP, 20-pin SOIC, 20-pad MLF/VQFN
• 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
• Industrial Temperature Range: -40°C to +85°C
• Low Power Consumption
   – Active Mode
      • 190 µA at 1.8V and 1MHz
   – Idle Mode
      • 24 µA at 1.8V and 1MHz
   – Power-down Mode
      • 0.1 µA at 1.8V and +25°C