Microchip Technology AVR® LA AVR32LA14/20/28/32 Microcontrollers
Microchip Technology AVR® LA AVR32LA14/20/28/32 Microcontrollers are entry-level AVR LA MCUs built for capacitive touch interface and low-power embedded applications. The devices utilize an AVR CPU with a hardware multiplier, running at clock speeds up to 20MHz, and are available in 14-, 20-, 28-, and 32-pin package options.
The AVR LA family combines flexible low-power architecture with an Event System, accurate analog subsystems, advanced digital peripherals, and a Peripheral Touch Controller. The Microchip AVR LA AVR32LA14/20/28/32 MCUs support capacitive touch buttons, sliders, wheels, and 2D surfaces with Driven Shield+ and Boost Mode technologies, helping designers create responsive touch-based interfaces across compact embedded systems.
The MCUs are ideal for wearable devices, consumer electronics, home automation, industrial and medical equipment controls, battery-powered sensors, and automotive HMI applications. The AVR LA supports a wide operating voltage range, integrated serial communication interfaces, configurable custom logic, and AEC-Q100 Grade 1 and functional safety-ready design support.
Features
- AVR CPU with single-cycle I/O register access, two-level interrupt controller, and two-cycle hardware multiplier
- Flexible low-power architecture with Idle, Standby, and Power-Down sleep modes
- Peripheral Touch Controller with Driven Shield+ and Boost Mode technologies for capacitive touch buttons, sliders, wheels, and 2D surfaces
- Four-channel Event System for CPU-independent and predictable inter-peripheral signaling
- Configurable Custom Logic with programmable Look-up Tables
- Integrated system monitoring with Power-On Reset, Brown-out Detector, and Voltage Level Monitor
- High-precision internal oscillator with auto-tuning for improved internal oscillator accuracy
- Serial communication support via USART, SPI, and I2C-compatible TWI interfaces
- Program and Debug Interface Disable support
- AEC-Q100 Grade 1 and functional safety-ready design support
Applications
- Wearable devices, including smart watches, fitness bands, and health monitors
- Consumer electronics, including remote controls, headphones, and earbuds
- Home automation, including touch panels and smart appliances
- Industrial and medical device touch interfaces for equipment control and diagnostic devices
- Battery-powered sensors, including IoT devices and key fobs
- Automotive Human-Machine Interface applications
Specifications
- Clock speed of up to 20MHz
- Supply voltage range of 1.62V to 5.5V
- Memory
- 32KB In-System Programmable Flash memory with true read-while-write operation
- 2KB SRAM
- 512B EEPROM
- 64B User Row in nonvolatile memory
- 64B Boot Row in nonvolatile memory
- Write/erase endurance
- Flash endurance of 10,000 cycles
- EEPROM endurance of 100,000 cycles
- Data retention of 40 years at 55°C
- Clock options
- High-precision internal oscillator with selectable frequency of up to 20MHz
- Internal ultra-low-power 32.768kHz oscillator
- External 32.768kHz crystal oscillator
- External clock input
- Peripheral set
- Two 16-bit Timer/Counters type B with capture and signal measurement capabilities
- One 16-bit Timer/Counter type E with three compare channels for PWM and waveform generation
- One 16-bit Real-Time Counter
- One USART with RS-485, LIN Host/Client, RTS/CTS hardware handshaking, and SPI Host protocol support
- One Host/Client SPI interface
- One TWI interface with dual address match and I2C-compatible Standard mode, Fast mode, and Fast mode Plus support
- One analog comparator
- One 10-bit, 166ksps ADC
- Peripheral Touch Controller support for up to 27 PTC pins for self-capacitance and mutual-capacitance channels
- Package pin-count options of 14, 20, 28, and 32 pins
Block Diagram
Dev Tools
Microchip Technology Curiosity Nano Development Platform
Compact development platform for 8-bit PIC and AVR MCUs and 32-bit Arm Cortex Core-based SAM MCUs.