Part Number: ATMEGA128RFA1-ZUR

Manufacturer: Microchip Technology

Description: IC RF TXRX+MCU 802.15.4 64VFQFN

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of ATMEGA128RFA1-ZUR

Datasheet  ATMEGA128RFA1-ZUR datasheet
Category RF/IF and RFID
Family RF Transceiver ICs
Manufacturer Atmel
Packaging Tape & Reel (TR)
Part Status Active
Type TxRx + MCU
RF Family/Standard 802.15.4
Protocol 6LoWPAN, Zigbee?
Modulation O-QPSK
Frequency 2.4GHz
Data Rate (Max) 2Mbps
Power – Output 3.5dBm
Sensitivity -100dBm
Memory Size 128kB Flash, 4kB EEPROM, 16kB SRAM
Serial Interfaces I2C, JTAG, SPI, USART
Voltage – Supply 1.8 V ~ 3.6 V
Current – Receiving 12mA ~ 12.5mA
Current – Transmitting 8mA ~ 14.5mA
Operating Temperature -40°C ~ 85°C
Package / Case 64-VFQFN Exposed Pad


The ATmega128RFA1-ZUR is a remarkable microcontroller that combines the power of an 8-bit AVR microprocessor with a 2.4 GHz ISM transmitter. It provides a unique combination of high-performance processing and low-power consumption, making it an adaptable solution for a wide range of applications. In this detailed overview, we will look at the ATmega128RFA1-ZUR’s essential characteristics, applications, programming, and practical suggestions.

Key Features of the ATMEGA128RFA1-ZUR at a glance:

  1. High-Performance AVR Microcontroller:
    • Advanced RISC architecture for efficient processing.
    • Up to 16 MIPS throughput at 16 MHz.
    • Executes most instructions in a single clock cycle.
  2. Non-volatile Memory:
    • 128K bytes of in-system self-programmable Flash memory.
    • 4K bytes of EEPROM for data storage.
    • 16K bytes of internal SRAM for data manipulation.
  3. Peripheral Features
    • Multiple Timer/Counter & PWM channels for precise timing.
    • Real-Time Counter with a separate oscillator for accurate timekeeping.
    • 10-bit, 330 ks/s Analog-to-Digital Converter (ADC) for analog sensing.
    • Master/Slave SPI Serial Interface.
    • Two Programmable Serial USART for serial communication.
    • Byte-Oriented 2-wire Serial Interface (I2C).
  4. Advanced Interrupt Handling:
    • Efficient interrupt management for responsive system behavior.
  5. Watchdog Timer and Reset:
    • Watchdog timer with a separate on-chip oscillator for system reliability.
    • Power-on reset and low current brown-out detector for robust operation.
  6. Power Save Modes:
    • Offers various low-power modes for energy-efficient operation.
    • Deep Sleep Mode with ultra-low current consumption (<250nA @ 25°C).
  7. Integrated Low-Power Transceiver:
    • Supports data rates from 250 kb/s to 2 Mb/s.
    • High receiver sensitivity (-100 dBm) and up to 3.5 dBm transmit power.
    • Hardware-assisted MAC features like Auto-Acknowledge and Auto-Retry.
    • 32-bit IEEE 802.15.4 Symbol Counter for wireless communication.
  8. Security Features:
    • Hardware-based security with Advanced Encryption Standard (AES).
    • True Random Generator for secure applications.
  9. Clock Management:
    • Integrated 32.768 kHz and 16 MHz crystal oscillators.
    • Voltage regulators for stable supply voltage.
  10. I/O and Packaging:
    • 38 programmable I/O lines for versatile interfacing.
    • Available in a 64-pad QFN package (RoHS compliant).
  11. Temperature Range and Supply Voltage:
    • Industrial-grade temperature range from -40°C to 125°C.
    • Wide supply voltage range from 1.8V to 3.6V.
  12. Ultra Low Power Consumption:
    • Low current consumption for both RX/TX and AVR operation.
    • Deep Sleep Mode with minimal current draw.
  13. Speed Grade:
    • Operates at speeds from 0 to 16 MHz across a voltage range of 1.8V to 3.6V.

These distinguishing characteristics make the ATMEGA128RFA1-ZUR an excellent choice for a wide range of applications, particularly those requiring a balance of high-performance processing and low power consumption. In the sections that follow, we will go through these features in greater depth, providing tips on how to use them for your projects.

Architecture and Power Efficiency

● Advanced RISC Architecture

The ATMEGA128RFA1-ZUR’s Advanced RISC (Reduced Instruction Set Computing) architecture is at its heart. This architecture is optimized for efficiency by allowing the microcontroller to execute the majority of instructions in a single clock cycle. Tasks are accomplished swiftly and efficiently, resulting in excellent performance. The powerful RISC architecture ensures that your code works efficiently, whether you’re doing complex computations or managing real-time tasks.

● Low-Power Operation

The ATMEGA128RFA1-ZUR’s low-power operation is one of its distinguishing qualities. Despite its excellent performance, this microcontroller is designed to consume as little power as possible. It can operate in a variety of low-power modes, making it a good choice for battery-powered applications that require high power efficiency. You may dramatically extend the battery life of your gadgets by utilizing these low-power settings.

● On-Chip 2-cycle Multiplier

The ATMEGA128RFA1-ZUR contains an on-chip 2-cycle multiplier for applications that demand quick multiplication operations. This hardware multiplier speeds up multiplication activities, increasing their efficiency and decreasing execution time. Whether you’re working on signal processing or other multiplication activities, the on-chip multiplier can help you optimize your code for speed and power efficiency.

Memory and Data Storage

● In-System Self-Programmable Flash

The microcontroller has 128K bytes of self-programmable Flash memory in-system. This memory stores your program code and is simply reprogrammable when the microcontroller is in your target system. This feature is important for updating firmware or modifying the functionality of your device without the need for a complete hardware replacement.


The ATMEGA128RFA1-ZUR contains 4K bytes of EEPROM and 16K bytes of inbuilt SRAM in addition to Flash memory. EEPROM is a type of non-volatile memory that keeps data even when the power is turned off, making it ideal for storing configuration settings or essential data. SRAM is a type of volatile memory that is used to store temporary data during program execution.

● JTAG Interface for Debugging

Debugging is an important aspect of the development process, and this microcontroller’s JTAG (Joint Test Action Group) interface makes it easier. It includes boundary-scan capabilities as well as full on-chip debug support, allowing you to easily debug and troubleshoot faults during development. The JTAG interface can also be used to program Flash memory, configure fuses, and control lock bits.

Peripheral Features

● Timer/Counter & PWM Channels

Multiple Timer/Counter and PWM (Pulse Width Modulation) channels are available on the ATMEGA128RFA1-ZUR. These characteristics are critical for jobs requiring precise timing and control, such as generating PWM signals for motor control or monitoring the duration between events.

● Real-Time Counter

This microcontroller incorporates a Real-Time Counter (RTC) with a dedicated oscillator for accurate timekeeping and time-based applications. This RTC can be used to timestamp events or to construct time-based triggers.

● Analog-to-Digital Converter (ADC)

The built-in 10-bit ADC allows you to accurately transform analog signals to digital values. This is useful in applications such as sensor data acquisition, where physical quantities such as temperature or light intensity must be measured.

● Serial Communication Interfaces

The ATMEGA128RFA1-ZUR includes a Master/Slave SPI, two Programmable Serial USARTs, and a Byte-Oriented 2-wire Serial Interface (I2C). These interfaces allow for easy communication with other devices, sensors, and peripherals, hence expanding the connectivity choices of the microcontroller.

In the following sections, we will look at the ATMEGA128RFA1-ZUR’s interrupt handling capabilities, power-saving modes, integrated transceiver, security features, clock management, I/O possibilities, temperature and supply voltage ranges, and more. These insights will provide you with a thorough understanding of the possibilities of this microcontroller for your projects.

Applications of the ATMEGA128RFA1-ZUR microcontroller:

  1. ZigBee® and IEEE 802.15.4:Ideal for home automation, industrial control, and wireless sensor networks.
  2. General-Purpose 2.4 GHz Transceiver:Suitable for wireless data loggers, remote controls, and custom wireless solutions.
  3. RF4CE (Consumer Electronics):Used in smart TVs, set-top boxes, and home theater systems for responsive remote control.
  4. WirelessHART™ (Industrial Automation):Enhances monitoring and control in industrial settings.
  5. ISM Applications:Versatile for wireless telemetry, remote monitoring, and ISM-based systems.
  6. IPv6 / 6LoWPAN (IoT):Supports IoT devices with low-power operation and Internet connectivity.

These brief summaries highlight the various application areas in which the ATMEGA128RFA1-ZUR microcontroller excels.


In conclusion, the ATMEGA128RFA1-ZUR microcontroller provides advanced functionality for a wide range of wireless applications. It is perfect for ZigBee, RF4CE, Wireless HART, ISM, and IoT projects due to its powerful processing, low power consumption, and integrated transceiver. Its rigorous security, clock control, and extended operating range make it a viable solution for a variety of industries, enabling wireless technology innovation.

If you want to fully realize the potential of accurate motion detection and transform your wireless projects, now is the time to act. Contact ICRFQ, China’s leading electronic component distributor, to begin your journey to cutting-edge wireless solutions. To learn more about the ATMEGA128RFA1-ZUR or to place an order, please contact us immediately. Take advantage of this opportunity to take your wireless technology initiatives to new heights!

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