ATmega328p Specification : Arduino / ATmega328p

Intoduction

This section discusses the Atmega328p specification and features available in the chip. There are other articles in this series that discuss each features in details.


Specification

  • High Performance, Low Power Atmel®AVR® 8-Bit Microcontroller Family
  • Advanced RISC Architecture
    • 131 Powerful Instructions – Most Single Clock Cycle Execution
    • 32 x 8 General Purpose Working Registers
    • Fully Static Operation
    • Up to 20 MIPS Throughput at 20MHz
    • On-chip 2-cycle Multiplier
  • High Endurance Non-volatile Memory Segments
    • 4/8/16/32KBytes of In-System Self-Programmable Flash Program Memory
    • 256/512/512/1KBytes EEPROM
    • 512/1K/1K/2KBytes Internal SRAM
    • Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
    • Data retention: 20 years at 85C/100 years at 25C
    • Optional Boot Code Section with Independent Lock Bits
      • In-System Programming by On-chip Boot Program
      • True Read-While-Write Operation
    • Programming Lock for Software Security
  • Atmel® QTouch® library support
    • Capacitive touch buttons, sliders and wheels
    • QTouch and QMatrix® acquisition
    • Up to 64 sense channels
  • Peripheral Features
    • Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
    • One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
    • Real-Time Counter with Separate Oscillator
    • Six PWM Channels
    • 8-channel 10-bit ADC in TQFP and QFN/MLF package with Temperature Measurement
    • 6-channel 10-bit ADC in PDIP Package with Temperature Measurement
    • Programmable Serial USART
    • Master/Slave SPI Serial Interface
    • Byte-oriented 2-wire Serial Interface (Philips I2C compatible)
    • Programmable Watchdog Timer with Separate On-chip Oscillator
    • On-chip Analog Comparator
    • Interrupt and Wake-up on Pin Change
  • Special Microcontroller Features
    • Power-on Reset and Programmable Brown-out Detection
    • Internal Calibrated Oscillator
    • External and Internal Interrupt Sources
    • Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby
  • I/O and Packages
    • 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF
  • Operating Voltage:
    • 1.8 – 5.5V
  • Temperature Range:
    • -40C to 85C
  • Processing Speed Grade:
    • 0 – 4MHz@1.8 – 5.5V, 0 – 10MHz@2.7 – 5.5.V, 0 – 20MHz @ 4.5 – 5.5V
  • Power Consumption at 1MHz, 1.8V, 25C
    • Active Mode: 0.2mA
    • Power-down Mode: 0.1µA
    • Power-save Mode: 0.75µA (Including 32kHz RTC)
Pinout of ATmega48A/PA/88A/PA/168A/PA/ Atmega328P Atmega328
Pinout of ATmega48A/PA/88A/PA/168A/PA/ Atmega328P / Atmega328
Internal Block Diagram of Atmega328P
Internal Block Diagram of Atmega328P

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