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Everything You Need to Know About ATTINY85 Microcontroller

The ATTINY85 microcontroller is a small but powerful device that brings flexibility and efficiency to a range of projects, from DIY electronics to industrial control systems. This article will guide you through its features, applications, and how to program it effectively.

Catalog

Overview of ATTINY85 Microcontroller

The ATTINY85 microcontroller is designed with a compact structure that combines efficient performance and power-saving capabilities. Known for its small size, this 8-bit microcontroller can manage various functions with minimal components, making it popular for both small-scale hobby projects and more demanding industrial applications. It has a program memory of 8K, allowing you to store applications efficiently while saving space. The ATTINY85 also includes multiple power-saving modes, enabling it to run efficiently on battery-operated devices. Its flexible range of input and output options further supports versatile usage, making it adaptable for a wide array of embedded system tasks. This compact, cost-effective design allows it to deliver solid performance without compromising on essential microcontroller features, offering an easy-to-use solution for developers and experimenters alike.

ATTINY85 Pin Configuration

[IMAGE OF ATTINY85 Pin Configuration]

ATTINY85 CAD Model

ATTINY85 Symbol

[IMAGE OF ATTINY85 Symbol]

ATTINY85 Footprint

[IMAGE OF ATTINY85 Footprint]

ATTINY85 3D Model

[IMAGE OF ATTINY85 3D Model]

Details of ATTINY85 Microcontroller

Compact and Affordable

The ATTINY85 is known for its small size and affordability, making it a great choice for both hobby projects and professional applications. It provides essential features without taking up much space or stretching your budget.

Adequate Memory

With 8K of program memory, the ATTINY85 offers enough space for many applications. This allows you to store code and execute a range of tasks without needing additional components or storage.

Power-Saving Modes

The ATTINY85 includes several power-saving modes, which help reduce power consumption in battery-operated devices. These modes allow it to run efficiently, prolonging battery life for mobile or remote projects.

Flexible I/O Options

Equipped with multiple input/output options, the ATTINY85 can handle various tasks and interact with different peripherals. This flexibility makes it adaptable for many types of embedded systems.

Built-in Watchdog Timer

The ATTINY85 comes with a watchdog timer, which helps prevent the microcontroller from hanging or freezing. This feature increases reliability, especially for applications that need consistent and stable performance.

ATTINY85 Features

High Performance and Low Power

The ATTINY85 operates as a high-performance microcontroller while using low power. Its compact 8-bit AVR design allows it to handle tasks efficiently without draining much energy, making it suitable for various applications.

Advanced RISC Architecture

With its RISC architecture, the ATTINY85 can execute 120 powerful instructions, most within a single clock cycle. It includes 32 x 8 general-purpose working registers, allowing for quick and smooth operations and fully static operation.

Reliable Memory Options

The microcontroller offers 8K bytes of in-system programmable flash memory, supporting up to 10,000 write/erase cycles. It also includes 512 bytes of in-system programmable EEPROM (up to 100,000 write/erase cycles) and 512 bytes of internal SRAM, making it suitable for a variety of data storage needs.

Strong Data Protection

The ATTINY85 includes a programming lock to protect your stored data and code, adding an extra layer of data security in memory.

Versatile Peripheral Features

Equipped with an 8-bit timer/counter with a prescaler, two PWM channels, and a high-speed timer, the ATTINY85 handles timing and pulse-width modulation tasks smoothly. It also supports a universal serial interface (USI) with a start condition detector and has a 10-bit ADC for handling analog signals.

Enhanced ADC Options

The 10-bit ADC offers four single-ended channels and two differential pairs with programmable gain, making it suitable for analog signal measurement. Temperature measurement is also possible, adding flexibility to its capabilities.

Built-in Watchdog Timer

The ATTINY85 includes a watchdog timer with a separate on-chip oscillator to keep it running consistently, helping prevent system errors from causing it to freeze or stall.

On-chip Analog Comparator

With an on-chip analog comparator, the ATTINY85 can quickly compare analog input signals, which is useful for applications requiring signal analysis or comparisons.

Special Microcontroller Features

The ATTINY85 offers debugWIRE for easy debugging, in-system programming via SPI port, and both external and internal interrupt sources. It also includes low-power idle modes, ADC noise reduction, and power-down modes to manage power efficiently.

Enhanced Power and Voltage Support

The enhanced power-on reset circuit and programmable brown-out detection circuit ensure reliability in varying power conditions. An internal calibrated oscillator provides stable operation without needing an external oscillator.

Programmable I/O Lines

With six programmable input/output lines, the ATTINY85 provides flexibility in how you connect it to other devices or components, allowing more versatile setups.

Wide Operating Voltage Range

Operating between 2.7 to 5.5V, the ATTINY85 can handle a variety of voltage inputs, making it compatible with different power sources.

Speed and Temperature Compatibility

The microcontroller performs efficiently across a range of speeds, reaching up to 20 MHz at higher voltages. It also operates within an industrial temperature range, from -40°C to 85°C, making it suitable for diverse environments.

Low Power Consumption

In active mode, the ATTINY85 draws just 300 µA at 1 MHz, 1.8V. In power-down mode, it reduces consumption to 0.1 µA at 1.8V, making it an excellent choice for battery-powered devices and power-sensitive applications.

ATTINY85 Specifications

Technical specifications, features, characteristics, and components with comparable specifications of Microchip Technology ATTINY85-20PU

[TABLE OF Specifications]

ATTINY85 Functional Block Diagram

[IMAGE OF ATTINY85 Functional Block Diagram]

Equivalents of ATTINY85

[TABLE OF ATTINY85 Equivalent]

Programming ATTINY85 Microcontroller

Programming the ATTINY85 involves several simple steps to get your code ready and running on the device. Here’s a quick guide to help you through it.

Define Tasks

First, outline what tasks you want the microcontroller to perform. Listing these tasks will give you a clear direction as you develop your code.

Write Functions

Next, write the functions or commands that the microcontroller will need to perform the tasks you listed. Using an Integrated Development Environment (IDE) can make this process easier.

Compile Code

After writing the functions, compile your code in the IDE to check for any errors. This step ensures that the code will run smoothly when transferred to the microcontroller.

Generate HEX File

Once compiled, the IDE will produce a HEX file, which is the format needed for the ATTINY85 to understand and execute the code. This file contains the machine instructions that will be stored on the microcontroller.

Choose Programmer

Select a programming device, like an SPI programmer, which will connect your computer to the ATTINY85. This programmer allows you to transfer the HEX file directly to the microcontroller’s memory.

Transfer HEX File

Using the programmer’s software, select the HEX file you generated and upload it to the ATTINY85. This step installs your code on the device, preparing it to execute as soon as it’s powered.

Connect Peripherals and Power Up

Finally, disconnect the programmer and connect any peripherals your application needs. Once powered, the ATTINY85 will begin executing the code you've loaded, completing the setup process.

Parts with Similar Specifications to ATTINY85

The parts on the right have specifications similar to the Microchip Technology ATTINY85-20PU

[TABLE OF Parts with Similar Specs]

ATTINY85 Applications

Development Boards and Hobby Projects

The ATTINY85 is widely used in development boards and DIY electronics projects due to its compact size and flexibility. It’s a great choice for anyone looking to create custom gadgets or automate simple tasks at home.

Industrial Control Systems

In industrial settings, the ATTINY85 can manage control systems where space and power efficiency are needed. Its stability and reliability make it suitable for basic control tasks in machinery or automated processes.

Power Regulation and SMPS Systems

The ATTINY85 is commonly used in power regulation and switch-mode power supply (SMPS) systems. Its ability to control and monitor power makes it ideal for devices that require consistent power management.

Analog Signal Measurement and Manipulation

With its built-in ADC (analog-to-digital converter), the ATTINY85 can measure and manipulate analog signals. This feature is useful in applications that require data collection from sensors or other analog sources.

Embedded Systems in Appliances

The ATTINY85’s compact design allows it to be embedded in appliances like coffee machines and vending machines, where it can manage basic operations or interface with user controls.

Display Units

The microcontroller can also be used to drive display units, controlling LEDs or small screens in devices where you need a simple display without complex hardware requirements.

Peripheral Interface Systems

The ATTINY85 is often used as an interface between different peripherals, allowing various components in a system to communicate effectively. This application is common in both consumer electronics and custom-designed circuits.

ATTINY85 Package

Top View

[IMAGE OF ATTINY85 Top View]

Side View

[IMAGE OF ATTINY85 Side View]

End View

[IMAGE OF ATTINY85 End View]

About the Manufacturer of ATTINY85

Microchip Technology Inc., based in Chandler, Arizona, is known for dependable microcontrollers and analog components. They focus on quality and reliable delivery while offering technical support to make product integration easier. Their commitment to innovation and customer needs makes products like the ATTINY85 valuable to a range of applications, from hobby projects to industrial systems.

Frequently Asked Questions [FAQ]

1. How many pins does the ATTINY85-20PU have?

The ATTINY85-20PU has a total of 8 pins. These pins allow the microcontroller to connect with other components, handle inputs and outputs, and control various functions in a circuit.

2. What is the operating temperature range for the ATTINY85-20PU?

The ATTINY85-20PU operates effectively within a temperature range of -40°C to 85°C. This range makes it suitable for applications that might face varying environmental conditions, from cold to moderately high temperatures, without impacting performance.

3. What is a key feature of the ATTINY85?

The ATTINY85 is a low-power, 8-bit CMOS microcontroller built on the AVR RISC (Reduced Instruction Set Computer) architecture. This design allows it to perform tasks efficiently while using minimal power, making it ideal for battery-operated and small-scale applications.