Functional Safety Ready Family of Microcontrollers for Real-Time Control, Connectivity and HMI Applications

The AVR® DA family brings real-time control functionality and easy capacitive touch to the low-power performance of AVR microcontrollers (MCUs). It pairs the latest Core Independent Peripherals (CIPs) with a robust Integrated Analog portfolio to create a device that not only excels as a stand-alone processor but also as a companion MCU in designs that demand precision. The high memory density of the AVR DA family makes these MCUs well suited for both wired and wireless communication-stack-intensive functions.

This family uses the latest CIPs with low-power features and 5V operation for increased noise immunity. The Event System and Configurable Custom Logic (CCL) peripherals, along with Intelligent Analog peripherals, like 12-bit differential Analog-to-Digital Converter (ADC), Zero-Cross Detect (ZCD), 10-bit Digital-to-Analog Converter (DAC) and the latest-generation Peripheral Touch Controller (PTC) with Driven Shield technology, make the AVR DA family ideal for low-latency control applications and capacitive touch user interfaces. The AVR DA family is designed to bring capacitive touch sensing and real-time control functions to industrial control, home appliance products, automotive, Internet of Things (IoT) and other applications. Our AVR DB MCUs are a great option for level-shifted, bi-directional communication with devices on a different power domain.

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Getting Started

The AVR128DA48 Curiosity Nano Evaluation Kit* (DM164151) is the ideal platform for rapid prototyping with new tinyAVR MCUs. The USB-powered kit features an on-board programmer/debugger that seamlessly integrates with the MPLAB® X IDE. The small form factor makes the board ideal for breadboard soldering, or you can combine it with the Curiosity Nano Base for Click boards™, which features multiple mikroBUS™ sockets so you can easily add sensors, actuators or communications interfaces from Mikroelektronika’s extensive selection of Click boards.

*This board is based on the 128 KB 48-pin AVR DA MCU. An evaluation kit with the 64-pin AVR DA is not available.

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AVR DA Family Products

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Functional Safety Ready for Safety-Critical Applications

The AVR DA family is well suited for safety-critical applications such as home appliance (IEC 60730), automotive (ISO 26262) and industrial (IEC 61508) products. We offer a UL-certified IEC 60730 class B library free of charge for home appliances in addition to important safety collaterals such as Failure Mode, Effect and Diagnostic Analysis (FMEDA) reports and a safety manual. The FMEDA reports and safety manual are ASIL B Ready-certified by SGS TÜV Saar.

We also offer the MPLAB XC8 Functional Safety Compiler license, which is a TÜV SÜD-certified compiler package supporting PIC® and AVR MCUs that includes qualification documentation for MPLAB X Integrated Development Environment (IDE) and MPLAB development ecosystem programmers. 

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System Features

Integrated Analog

12-bit ADC, 10-bit DAC, ZCD, Analog Comparator

The on-board 12-bit, 130 ksps differential Analog-to-Digital Converter (ADC) features selectable internal voltage references with minimal temperature drift. Using the Event System, the on-board Analog Comparator (AC) can be connected to trigger autonomous operation in other peripherals, which is ideal for real-time control and closed-loop operations. The output of the 10-bit Digital-to-Analog Converter (DAC) can either be sent to a pin or it can be used to generate an adjustable reference voltage for the AC

Real-Time Response

Event System

The Event System allows peripherals to communicate directly with each other without involving the CPU or bus resources. This means that different triggers at the peripheral level can result in an event, such as a timer’s interrupts triggering an action in another peripheral. The Event System has three independent channels for direct peripheral-to-peripheral signaling. This deterministic signaling method is a perfect fit for real-time applications. The events are handled at the peripheral level even if the CPU is occupied handling interrupts or in sleep mode.

Hardware Customization

Custom Logic

The Custom Logic peripheral is a programmable logic peripheral that can be connected to the device pins, events or other internal peripherals. Each Lookup Table (LUT) consists of three inputs: a truth table, an optional synchronizer and a filter and edge detector. An LUT can generate an output to be routed internally or to an I/O pin. This eliminates the need for external logic and reduces BOM cost.

Human-Machine Interface

Peripheral Touch Controller (PTC)

The Peripheral Touch Controller (PTC) is an autonomous unit that acquires and processes capacitive touch signals. It supports buttons, sliders, wheels and 2D surface configurations in addition proximity sensing , and it requires no additional external components. This CIP offers a broad range of touch-enabled features, such as mutual and self capacitance, noise filtering, moisture tolerance, auto calibration over temperature and voltage, as well as wake-up upon touch and/or proximity from sleep mode.

Create State-of-the-Art Applications with Capacitive Touch

The PTC offers built-in hardware for capacitive touch measurement on sensors that function as buttons, sliders, wheels and 2D surfaces. It is designed to perform capacitive touch acquisition on sensors independently from the CPU, resulting in low CPU utilization and reduced power consumption.

The AVR DA family comes with the latest-generation PTC with Driven Shield+ and Boost Mode technologies. Driven Shield+ technology enables better noise immunity, water tolerance and enhanced sensitivity, while the Boost Mode enables increased Signal to Noise Ratio (SNR) for even greater robustness against noise or reduced touch acquisition time to enable more responsive capacitive touch designs.

  • Low CPU load with 5% CPU load scanning, 10 channels at 50 ms scan rate
  • Glove support for interface applications intended for cold or harsh environments
  • Driven Shield+ technology for moisture robustness and reliability even with droplets of water
  • Boost Mode increases SNR or reduces touch acquisition time
  • Touch interface options:
    • Buttons, sliders and wheels
    • 2D surface
    • Proximity sensing
  • Mix-and-match sensor configurations with:
    • Up to 46 self-capacitance sensors
    • Up to 529 mutual-capacitance sensors
  • Auto calibration with zero drift over temperature and voltage

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Family Offering (Pin Count vs. Memory)

Key Features

  • Internal 24 MHz oscillator
  • Up to 16 KB SRAM
  • Up to 22-channel, 130 ksps 12-bit differential Analog-to-Digital Converter (ADC)
  • 10-bit 350 ksps Digital-to-Analog Converter (DAC)
  • Analog Comparator with scalable reference input
  • 16-bit Real Time Clock (RTC) and Periodic Interrupt Timer

 

  • Configurable Custom Logic (CCL) peripheral
  • Up to 10-channel Peripheral Event System
  • Configurable, internally generated reference voltage
  • USART/SPI/dual-mode Two-Wire Interface (TWI)
  • Up to three Zero Cross Detectors (ZCDs)
  • Cyclic Redundancy Check (CRC) scan

Easy Prototyping and Evaluation

Evaluating and prototyping user interfaces using buttons, slider, wheels and 2D surface gestures is easy using the AVR128DA48 Curiosity Nano in combination with the Curiosity Touch Adapter board and one of the QTouch® Xplained Pro Extension Kits listed below.

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AVR128DA48 Curiosity Nano Evaluation Kit

Part number: DM16415

Take your next idea to market with a development board that you can keep in your pocket. With full program and debug capabilities, the AVR128DA48 Curiosity Nano Evaluation Kit offers complete support for your next design.

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Curiosity Nano Base for Click boards™

Part number: AC164162

The Microchip Curiosity Nano Base for Click boards™ evaluation kit is a hardware extension platform to ease the connection between Curiosity Nano kits and extension boards like the mikroBUS Click modules and Xplained Pro extension boards.

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Curiosity Touch Adapter

Part Number: AC80T88A

This board is designed to be used in combination with the AVR128DA48 Curiosity Nano board and the QTouch Xplained Pro Extension Kits, enabling easy evaluation of the touch performance of AVR DA microcontrollers.

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QT2 Xplained Pro Extension Kit

Part Number: ATQT2-XPRO

Touch Application: 2D Surfaces

This board offers a 4 × 4 channel touch surface and a 7 × 7 blue LED matrix to provide visual feedback when sensing a touch.

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