ATtiny45 Microcontroller

ATtiny45 Microcontroller 

The ATtiny45 is an 8-bit AVR microcontroller developed by Atmel (now Microchip Technology). It belongs to the ATtiny family, which is designed for small, low-power, and low-cost embedded applications.

The ATtiny45 uses Harvard architecture and a RISC instruction set, allowing most instructions to execute in a single clock cycle. It integrates Flash program memory, SRAM, EEPROM, GPIO, timers, ADC, and communication interfaces on a single chip, making it suitable for compact control and sensing applications.

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Features

• 8-bit AVR RISC CPU
• Operating voltage:
• 1.8 V – 5.5 V
• Maximum clock frequency:
• Up to 20 MHz (external clock)
• Program memory:
• 4 KB Flash
• Data memory:
• 256 bytes SRAM
• 256 bytes EEPROM
• I/O pins:
• 6 programmable digital I/O pins
• Timers/Counters:
• Two 8-bit timers
• One high-speed timer with PWM
• Analog features:
• 10-bit ADC with up to 4 channels
• Communication interfaces:
• SPI
• I²C (via USI – Universal Serial Interface)
• PWM outputs
• Interrupt system
• Watchdog Timer (WDT)
• Low-power modes: Idle, ADC Noise Reduction, Power-down
• In-System Programming (ISP)
• Available packages: DIP-8 and SMD (SOIC, VQFN)

Applications

• Compact embedded control systems
• Sensor interfacing
• LED and lighting control
• Battery-powered devices
• Wearable electronics
• Robotics and automation
• Educational and DIY projects