The Atmel ATmega328 is a 32K 8-bit microcontroller based on the AVR architecture. Many instructions are executed in a single clock cycle providing a throughput of almost 20 MIPS at 20MHz. The ATMEGA328-PU comes in an PDIP 28 pin package and is suitable for use on our 28 pin AVR Development Board.

• 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 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) by via boot loader
• True Read-While-Write operation
• Programming lock available for software security
• Features Include
• 2 x 8-bit Timers/Counters each with independent prescaler and compare modes
• A single 16-bit Timer/Counter with an idependent prescaler, compare and capture modes
• Real time counter with independent oscillator
• 10 bit, 6 channel analog to digital Converter
• 6 pulse width modulation channels
• Internal temperature sensor
• Serial USART (Programmable)
• Master/Slave SPI Serial Interface - (Philips I2C compatible)
• Programmable watchdog timer with independent internal oscillator
• Internal analog comparator
• Interrupt and wake up on pin change
• Additional Features Features
• Internal calibrated oscillator
• Power on reset and programmable brown out detection
• External and internal interrupts
• 6 sleep modes including idle, ADC noise reduction, power save, power down, standby, and extended standby
• I/O and Package
• 23 programmable I/O lines
• 28 pin PDIP package
• Operating voltage:
• 1.8 - 5.5V
• Operating temperature range:
• 40°C to 85°C
• Speed Grades:
• 0-4 MHz at 1.8-5.5V
• 0-10 MHz at 2.7-5.5V
• 0-20 MHz at 4.5-5.5V
• Low power consumption mode at 1.8V, 1 MHz and 25°C:
• Active Mode: 0.3 mA
• Power-down Mode: 0.1 μA
• Power-save Mode: 0.8 μA (Including 32 kHz RTC)