Part Number: ATMEGA128A-AU

Manufacturer: Microchip Technology

Description: IC MCU 8BIT 128KB FLASH 64TQFP

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Technical Specifications of ATMEGA128A-AU

Datasheet  ATMEGA128A-AU datasheet
Category Integrated Circuits (ICs)
Family Embedded – Microcontrollers
Manufacturer Atmel
Series AVR? ATmega
Packaging Tray
Part Status Active
Core Processor AVR
Core Size 8-Bit
Speed 16MHz
Connectivity EBI/EMI, I2C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 53
Program Memory Size 128KB (64K x 16)
Program Memory Type FLASH
EEPROM Size 4K x 8
RAM Size 4K x 8
Voltage – Supply (Vcc/Vdd) 2.7 V ~ 5.5 V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Package / Case 64-TQFP
Supplier Device Package 64-TQFP (14×14)

ATMEGA128A-AU Introduction

The Atmel® ATmega128A is an AVR® enhanced RISC-based low-power CMOS 8-bit microcontroller. The ATmega128A is close to 1MIPS per MHz because it can run powerful instructions in a single clock cycle. This lets system designers find the best balance between how much power the device uses and how fast it can process information.

ATMEGA128A-AU Description

The Atmel AVR core includes a full instruction set and 32 general-purpose working registers. The Arithmetic Logic Unit is connected to all 32 registers (ALU). As a result, a single instruction that executes in a single clock cycle can access two separate registers. The architecture is code-efficient and outperforms CISC microcontrollers in throughput by up to ten times.

The ATmega128A includes Real Time Counter (RTC), four flexible Timer/Counters with compare modes and PWM, a Real Time Counter (RTC), 128Kbytes of Read-While-Write In-System Programmable Flash, 4Kbytes EEPROM, 4Kbytes SRAM, 53 general purpose I/O lines, 32 general purpose working registers, 2 USARTs, and one byte-oriented Two-wire Serial Interface. IEEE std. Power-down mode preserves register values but stops all chip operations until the subsequent interrupt or hardware reset by freezing the oscillator. In Power-save mode, the asynchronous timer operates, allowing the user to maintain a timer base while the device is dormant.

Asynchronous Timer and ADC are the only I/O modules enabled by the ADC Noise Reduction option, which reduces switching noise during ADC conversions. The Crystal/Resonator Oscillator is in “Standby” mode while the gadget is dormant. The machine starts up more quickly and consumes less energy as a result. Running in extended standby is the primary oscillator and asynchronous timer. The device uses high-density nonvolatile memory from Atmel. The on-chip ISP Flash can reprogram the program memory in-system using an SPI serial interface, a conventional nonvolatile memory programmer, or an AVR core running On-chip Boot software.

The boot software can use any interface to download the application program to application Flash memory. Using Boot Flash software while upgrading Application Flash makes genuine read-while-writing work. A powerful microcontroller that may be utilized in various embedded control applications is the Atmel ATmega128A. It comprises an integrated In-System Self-Programmable Flash and an 8-bit RISC CPU. There is a full set of program and system development tools for the ATmega128A AVR. C compilers, macro assemblers, program debuggers/simulators, in-circuit emulators, and evaluation kits are some of these tools.

Features and Specifications of the ATMEGA128A-AU

The ATMEGA128A-AU is a very powerful microcontroller with several features and specs that make it perfect for a wide range of uses. Some of its most important features and specs are:

● Memory:

The microcontroller has 4 KB of static RAM, 128 KB of flash memory, and 4 KB of EEPROM.

● Peripherals:

In addition to SPI, USART, and I2C interfaces, the ATMEGA128A-AU contains an 8-channel 10-bit analog-to-digital converter (ADC), two 8-bit and two 16-bit timer/counters, a real-time counter with a dedicated oscillator, three PWM channels, and an 8-channel 10-bit DAC.

● Communication:

The microcontroller has full-duplex UART communication and SPI and I2C interfaces. This makes it a great microcontroller for applications that need to talk to other devices.

● Power Consumption:

A microcontroller with less than 1 mW of power consumption per MHz is the ATMEGA128A-AU. Moreover, it offers a power-saving mode that uses less energy—less than 100 nA.

Programming the ATMEGA128A-AU

The ATMEGA128A-AU may be programmed using a variety of tools and programming languages. For the ATMEGA128A-AU, C is the most often used programming language, and the Atmel Studio Integrated Development Environment is the most widely used programming environment.

The IDE offers several tools that simplify writing, testing, and fixing code, including a code editor, debugger, and simulator. C, C++, and Assembly are just a few of the programming languages supported by the IDE.

The microcontroller can also be programmed using tools like AVR Studio and CodeVision AVR. Similar functionalities to those in the Atmel Studio IDE are present in these products. It is also simpler to program the microcontroller because they support several programming languages.

Applications of the ATMEGA128A-AU

The ATMEGA128A-AU is a flexible microcontroller that can be used for many things. Here are some ways that the microcontroller can be used:

● Industrial Control:

The microcontroller is great for industrial control applications because it uses little power and has many ways to talk to other devices.

● Robotics:

The microcontroller has many peripherals, such as PWM channels and DACs, that make it perfect for robotics.

● Automotive:

The microcontroller can work in temperatures from -40°C to 85°C, and its durability makes it a good choice for engine management and control systems in cars.

● Home Automation:

The microcontroller is a great choice for home automation systems like smart thermostats and lighting controls because it is easy to talk to and uses little power.

● Medical Devices:

The microcontroller is great for medical devices like insulin pumps and blood glucose meters because it uses little power and has many ways to talk to other devices.

● Consumer Electronics:

The microcontroller has a wide range of peripherals and uses little power, so it can be used for remote controls and gaming devices.

Getting Started with the ATMEGA128A-AU

It can be hard to get started if you have never programmed a microcontroller or an ATMEGA128A-AU. But there are a lot of resources you can use to get started quickly.


In conclusion, the ATMEGA128A-AU microcontroller is a very powerful and flexible device used in various industrial and consumer electronic applications. With its great features and specs, this microcontroller makes it easy for developers and engineers to make strong and effective systems. Even though programming might seem hard, many tools like C and the Atmel Studio IDE can help you learn.

The ATMEGA128A-AU is a great choice for your next project, whether you are an experienced developer or just starting out. Also, at ICRFQ, we offer competitive prices on high-quality electronic parts like the ATMEGA128A-AU, and our team is always ready to help with any questions or orders. So, please don’t be afraid to ask us for help.

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