The ATMEGA328-PU 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 ATMEGA328-PU achieves throughputs approaching 1MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

High Performance, Low Power Design

8-Bit Microcontroller Atmel® AVR® advanced RISC architecture

• 131 Instructions most of which are executed in a single clock cycle
• Up to 20 MIPS throughput at 20 MHz
  
• 32 x 8 working registers
  
• 2 cycle multiplier

Memory Includes

• 32KB of programmable FLASH
• 1KB of EEPROM
  
• 2KB SRAM
  
• 10,000 Write and Erase Cycles for Flash and 100,000 for EEPROM
  
• Data retention for 20 years at 85°C and 100 years at 25°C
  
• Optional boot loader with lock bits
  
• In System Programming (ISP) via boot loader
  
• True Read-While-Write operation
  
• Programming lock available for software security