Microchip ATTINY461-20SUR: An 8-Bit AVR Microcontroller Datasheet and Application Overview
The Microchip ATTINY461-20SUR is a high-performance, low-power 8-bit microcontroller based on the AVR enhanced RISC architecture. This robust MCU, housed in a 20-pin SOIC package, is engineered to deliver a compelling mix of processing power, energy efficiency, and peripheral integration, making it an ideal solution for a vast array of embedded control applications.
Core Architecture and Performance
At the heart of the ATTINY461-20SUR lies a powerful AVR core. By executing most instructions in a single clock cycle, the device achieves throughputs approaching 1 MIPS per MHz, allowing the designer to optimize power consumption versus processing speed. The microcontroller operates at a maximum of 20 MHz, supported by the -20SUR speed grade, and can function from 2.7V to 5.5V, making it suitable for both 3V and 5V systems.
Key Memory and Peripheral Features
The device is equipped with 4KB of In-System Programmable Flash memory, 256B of EEPROM, and 256B of internal SRAM. Its rich set of peripherals is designed to minimize external component count and simplify design complexity. Notable features include:
10-bit ADC: A precision 11-channel Analog-to-Digital Converter for accurate sensor data acquisition.
Dual Analog Comparators: For robust waveform generation and monitoring functions.
USI (Universal Serial Interface): A highly flexible peripheral that can be configured to implement SPI, I2C, or UART protocols, providing versatile communication options.
PWM Channels: Multiple Pulse Width Modulation channels, ideal for controlling motors, LEDs, and generating analog signals.
Hardware LIN Controller: Supports Local Interconnect Network protocol, which is valuable in automotive and industrial networking applications.
Application Overview
The integration of these features opens the door to numerous applications. The ATTINY461-20SUR is perfectly suited for:
Sensor Interface and Data Logging: Its high-resolution ADC and ample non-volatile memory (EEPROM) allow it to read multiple sensors (e.g., temperature, pressure, light) and store the data reliably.
Motor Control Systems: The fast PWM and analog comparators enable precise control of small DC and stepper motors in consumer appliances and industrial tools.
LED Lighting Control: Capable of driving and dimming multiple LED strings independently for sophisticated lighting effects.
Consumer Electronics: Used as a system controller in devices like remote controls, gaming accessories, and smart home modules due to its compact size and low-power capabilities.
Automotive Accessory Control: The integrated LIN controller makes it a strong candidate for nodes in automotive networks, such as controlling window lifts, sunroofs, or seat modules.
Development and Programming
Development is supported by a full suite of tools, including the popular Atmel Studio (now Microchip Studio) and the affordable AVRDUDE programmer. Its In-System Programmable (ISP) interface allows for easy flashing of code even after the device is soldered onto a circuit board, streamlining prototyping and production.
The Microchip ATTINY461-20SUR stands out as a highly integrated and cost-effective solution for space-constrained and power-sensitive designs. Its blend of processing performance, a rich peripheral set including unique features like a LIN controller, and robust development support makes it a versatile workhorse for engineers developing advanced embedded systems across consumer, industrial, and automotive markets.
Keywords:
1. AVR Microcontroller
2. Low-Power
3. Peripheral Integration
4. Sensor Interface
5. LIN Controller
