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Atmel Corporation is a global leader in designing, manufacturing and marketing advanced semiconductors including microcontroller (MCU), programmable logic, and nonvolatile memory. By combining these core technologies, Atmel meets the evolving and growing needs of today's electronic system design engineer through the production of general purpose and application specific system level integrated chips. Atmel's world class expertise and wealth of experience in system-level integration enable all of Atmel's products to be developed from their constituent blocks with minimum delay and risk.



Atmel QTouch Library

Atmel offers a free QTouch® library for embedding capacitive touch buttons, sliders and wheels functionality into your general-purpose AVR® microcontroller applications. The easy-to-use QTouch Suite allows you to explore, develop and debug your own touch applications. If you prefer to use fixed functional capacitive touch controllers for your products, Atmel also offers fixed functional devices.

Providing several library files for each device, supporting different numbers of touch channels, the QTouch Library opens up for high flexibility and efficiency in your touch application. By selecting the library file supporting the number of channels needed, you will gain a more compact and efficient code using less RAM. The following number of channels is supported depending on your choice of microcontroller:


QTouch method - 4, 8, 16, 32 channels

QMatrix method - 8, 16, 32, 64 channels

Atmel QTouch Library Features
  • Capacitive touch sensing using patented charge-transfer signal acquisition for robust sensing
  • Support for a range of Atmel MCUs, tinyAVR®, megaAVR®, XMEGA™, UC3A, UC3B
  • Support for up to 64 sense channels
  • Supports both QTouch and QMatrix™ acquisition methods.
  • Flexible choice of touch sensing functionallity (keys, sliders, wheels) in a variety of combinations
  • Includes Adjacent Key Suppression® (AKS™) technology for the unambiguous detection of key events
  • Fully debounced reporting of touch keys
  • 256-level slider or wheels using only 3 channels
  • Common API across all library versions



Atmel Product Line




New Atmel Products
Added 03/2010 AT88SA1xx CryptoAuthentication™ ICs View Part Numbers
Added 02/2010 AT91SAM9G45 Microprocessor View Part Numbers
Added 10/2009 AT32UC3A3 Microcontrollers View Part Numbers
Added 07/2009 ATAVRMC320 Motor Control Bundle Kit View Part Numbers
Added 05/2009 QTouch™ Sensor IC View Part Numbers
Added 04/2009 AVR® XMEGA™ Microcontrollers View Part Numbers
Added 03/2009 AVR32 EVK1105 Evaluation Kit View Part Numbers
Added 12/2008 ATtiny48/88 Microcontrollers View Part Numbers
Added 06/2008 RZRaven Evaluation and Starter Kit View Part Numbers
Added 05/2008 AVR®32 UC3A Microcontroller View Part Numbers
Added 04/2008 picoPower AVR® MCUs View Part Numbers
Added 03/2008 ATSTK600 Starter Kit View Part Numbers



Featured New Atmel Products

Atmel AT88SA1xx CryptoAuthentication™ ICs

The Atmel AT88SA1xx CryptoAuthenticationIC family is a robust solution for any system design that requires protection from clones. The Atmel AT88SA100S Battery Authentication Chip is a small CryptoAuthentication chip that can be used to validate battery packs and other replaceable items containing a power source. The AT88SA100S uses the industry leading SHA-256 hash algorithm to provide the ultimate level of security. The Atmel AT88SA102S Product Authentication Chip is a CryptoAuthentication IC designed to securely authenticate an item to which it is attached. The AT88SA102S can also be used to exchange session keys with some remote entity so that the system microprocessor can securely encrypt/decrypt data. The AT88SA10HS Host Security Chip can validate the response coming from the SHA-256 engine within an authentic CryptoAuthentication client even if that responses includes the serial number of the client within the computation. These AT88SA1xx CryptoAuthentication ICs have a key length of 256 bits that prevents exhaustive attacks.

Atmel AT91SAM9G45 Microprocessor

The Atmel AT91SAM9G45 embedded microprocessor is designed to provide a high-performance processor solution with high flexibility for general and multimedia-oriented applications. The Atmel AT91SAM9G45 is based on the integration of an ARM926EJ-S processor with fast SRAM and a wide range of peripherals. This Atmel microprocessor (MPU) features efficient clock gating that greatly reduces power consumption under all conditions of use. The AT91SAM9G45 also provides internal multi-layer bus architecture associated with a multi-port DDR2, a 32-bit External Bus Interface, and 64 KB of internal SRAM that allows it to sustain high bandwidth required by its high speed peripherals. The hardware peripherals on the AT91SAM9G45 include a High Speed (480 Mbps) USB Device and Host with transceivers, a 10/100 Mbps Ethernet controller, a High Speed Multimedia Card interface, an LCD controller supporting STN and TFT displays up to 1289*860, a camera interface, and several communication peripherals.

Atmel QTouch™ Sensor IC

The Atmel QTouchsensor IC family arms designers with robust, reliable capacitive touch controls used in economical and elegant touchscreens that respond to a wide variety of touch types and gestures. The Atmel QTouch IC family derives its robust and reliable characteristics from the signal processing in the decision logic, which eliminates false triggering due to electrostatic spikes or momentary unintentional touch or proximity. The sensors in the Atmel QTouch IC can drive single or multiple keys, and each key can be set for an individual sensitivity level. QTouch technology can be deployed in normal touch mode or high-sensitivity proximity mode. In proximity mode, highly sensitive charge transfer proximity sensing is used to detect an end-user's approaching finger and has the user interface interrupt the electronic equipment or electrical appliance to initiate a system function.

Atmel AT32UC3A3 AVR®32 UC Microcontrollers

The Atmel AT32UC3A3 AVR®32 UC 32-bit microcontroller (MCU) family is ideal for cost-sensitive embedded applications and features low power consumption, high code density, and high performance. The Atmel AT32UC3A3 MCU family is made for exceptionally high data throughput with hi-speed USB OTG, SD/SDIO card, and Multi-Level-Cell (MLC) NAND Flash with ECC and SDRAM interfaces. This Atmel MCU family is designed with the multi-layered AVR32 databus, 128 KB on-chip SRAM with triple high speed interfaces, and a multi-channel peripheral and memory to memory DMA controller. The AT32UC3A3 MCU family also features a Hi-Fi stereo audio DAC, and a full duplex multi-channel I2S audio interface.

Atmel AVR32 EVK1105 Evaluation Kit

The Atmel AVR32 EVK1105 is an evaluation kit for the AT32UC3A0512 that demonstrates Atmel´s state-of-the-art AVR32 microcontroller (MCU) in Hi-Fi audio decoding and streaming applications. The Atmel EVK1105 evaluation kit contains reference hardware and software for generic MP3 player docking stations. The AVR32 EVK1105 features 10/100 Ethernet and USB OTG interface, SPI, TWI, and UARTs, 320 x 240 QVGA TFT LCD, Capacitive Touch keyboard, stereo audio 3.5mm jack output, and an MMC/SD card expansion connector.

Atmel AVR® XMEGA™ Microcontrollers

Atmel´s AVR® XMEGA™ 8-bit and 16-bit microcontrollers (MCUs) combine second generation picoPower™ technology, 1.6V operation, and fast 12-bit analog functions. The Atmel devices also include a DMA controller, an innovative Event System, a crypto engine, and multiple communication modules and timer/counters. The MCUs have a maximum speed of 12 MHz at 1.6V and 32 MHz from 2.7V. XMEGA devices use the same CPU and instruction set as other 8-bit AVR products. All XMEGA family members are pin and code compatible. The devices are ideal for industrial control, medical, and ZigBee® applications.





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Atmel Videos
Atmel UC3L Overview Video

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Atmel XMEGA! Video

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Atmel Qtouch Library 3.0 Video

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Atmel AVR RZ Raven Video

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