The ATtiny2313 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 ATtiny2313 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

FEATUREs
• Utilizes the AVR® RISC Architecture
• AVR – High-performance and Low-power RISC Architecture
– 120 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
• Data and Non-volatile Program and Data Memories
– 2K Bytes of In-System Self Programmable Flash
Endurance 10,000 Write/Erase Cycles
– 128 Bytes In-System Programmable EEPROM
Endurance: 100,000 Write/Erase Cycles
– 128 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 Mod
– 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, and 32-pin MLF
• Operating Voltages
– 1.8 - 5.5V (ATtiny2313)
• Speed Grades
– ATtiny2313V: 0 - 2 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.4 - 5.5V
– ATtiny2313: 0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V
• Power Consumption Estimates
– Active Mode
1 MHz, 1.8V: 300 µA
32 kHz, 1.8V: 20 µA (including oscillator)
– Power-down Mode
< 0.2 µA at 1.8V