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ATmega4809 Product Family

8-bit MCUs built for Real-time Control with Core Independent Peripherals


The megaAVR® microcontrollers (MCUs) broaden the effectiveness of real-time control systems with a combination of intelligent hardware peripherals alongside the low-power capacity of the AVR core. Each of the ATmega4809, 4808, 3209 and 3208 offer individualized options for pin-counts, packages, and memory. Each includes a high-speed ADC and easy-to-configure Core Independent Peripherals, making the megaAVR family optimal for use as companion MCUs for complex microprocessor-based systems, or as standalone processors in command-and-control environments.


Engineered for Real-time Control

Modern control applications utilize MCUs to increase their performance, while making them more efficient and reliable. The new megaAVR® devices take the concept further with a peripheral set designed to decrease system response time and increase reliability, while at the same time reducing overall code footprint, validation time and system development cost. 


Getting Started

Take your next idea to market with a development board that you can keep in your pocket. With full program and debug capabilities, the ATmega4809 Curiosity Nano Evaluation Kit offers complete support for your next design. The ATmega4809 microcontroller broadens the effectiveness of real-time control systems with a combination of intelligent hardware peripherals alongside the low-power capacity of the AVR core.


Significantly reduce your development time with Atmel START, our intuitive, web-based graphical configuration tool for embedded projects. While you navigate through the easy-to-use interface, Atmel START generates factory-validated C-code to help get your design started quickly. Get started today at start.atmel.com

With a few clicks, Atmel START projects can be imported into the Atmel Studio Integrated Development Environment (IDE) and can be easily modified at any time. Download Atmel Studio 7.



Building Blocks for Real-Time Control

High-Speed ADC

True 10-bit resolution and conversion speeds of 115,000 samples per second (ksps) ensure accurate and timely analog signal acquisition. Triggering and notifications can be transmitted to other peripherals without CPU intervention, enabling real-time response to system events.

Peripheral Event System

The on board dual 10-bit, 115 ksps ADC and 8-bit DAC with multiple selectable internal voltage references and comparators can be connected internally to create closed-loop feedback without requiring pins or PCB space or can be used for other functions within the applications. In addition, the on-board analog comparator offers fast propagation delay which is configurable through hysteresis. The analog comparator can also be connected directly with the DAC and the output is directly available on a pin.


Configurable Custom Logic (CCL)

The Configurable Custom Logic is a programmable logic peripheral which can be connected to the device pins, events, or other internal peripherals. This allows the user to eliminate logic gates for glue logic functions on the PCB. Each Lookup Table (LUT) consists of three inputs, a truth table, options synchronizer, filter and edge detector. Each LUT can generate an output that can be routed internally or available on pins. This eliminates the need for external logic and reduces BOM cost.

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ATmega4809 Key Attributes

  • Internal 20MHz oscillator
  • Up to 48KB of FLASH memory
  • Up to 16-channel, high speed 10-bit ADC
  • Cyclic Redundancy Check (CRC) with SCAN
  • 16-bit Real Time Clock
  • Configurable Custom Logic peripheral
  • 6-channel Peripheral Event System
  • Analog Comparator with scalable reference input
  • Configurable, internally generated Reference Voltage
  • UART / SPI / dual-mode I2C
  • Available with up to 41 I/O