ATAVRQTOUCHX Atmel, ATAVRQTOUCHX Datasheet - Page 11

• Manufacturer Part Number: ATAVRQTOUCHX
• Description: BOARD EVAL CAPACITIVE TOUCH
• Manufacturer: Atmel
• Series: QTouch™r

Specifications of ATAVRQTOUCHX

• Sensor Type: Touch, Capacitive
• Sensing Range: 1 Slider, 1 Wheel, 2 Buttons
• Interface: USB
• Voltage - Supply: 5V, USB
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: AT90USB1287, ATxmega128A1
• Silicon Manufacturer: Atmel
• Silicon Family Name: ATxmega
• Kit Contents: Board
• Svhc: No SVHC (15-Dec-2010)
• Core Architecture: AVR
• Core Sub-architecture: AVR19
• Kit Features: One Slider, One Wheel And 2
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

4 Abbreviations and Definitions
4.1 Definitions
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AVR: refers to a device(s) in the tinyAVR®, megaAVR®, XMEGA™ and UC3
microcontroller family.
ARM: refers to a device in the ATSAM ARM® basedmicrocontroller family.
ATMEL QTouch Library: The combination of libraries for both touch sensing acquisition
methods (QTouch and QMatrix).
QTouch Technology: A type of capacitive touch sensing technology using self
capacitance - each channel has only one electrode.
QMatrix Technology: A type of capacitive touch sensing technology using mutual
capacitance – each channel has an drive electrode (X) and an receive electrode (Y).
Sensor: A channel or group of channels used to form a touch sensor. Sensors are of 3
types (keys, rotors or sliders).
KEY: a single channel forms a single KEY type sensor, also known as a BUTTON
ROTOR, also known as a WHEEL, a group of channels forms a ROTOR sensor to detect
angular position of touch.
SLIDER, a group of channels forms a SLIDER sensor to detect the linear position of
touch.
AKS: Adjacent Key Suppression. See Section 5.4.5
SNS PIN: Sense line for capacitive measurement using the QTouch Technology -
connected to Cs.
SNSK PIN: Sense Key line for capacitive measurement using the QTouch Technology -
connected to channel electrode through Rs.
X Line: The drive electrode (or drive line) used for QMatrix Technology.
Y Line: The receive electrode (or receive line) used for QMatrix Technology.
Port Pair: A combination of SNS port and SNSK port to which sensors are connected for
QTouch technology. The SNS and SNSK ports used in a port pair can be located in the
same AVR Port (8 pins for 4 sensors), or they may be in different 2 different AVR Ports
(8+8 pins for 8 sensors).
Charge Cycle Period: It is the width of the charging pulse applied to the channel
capacitor.
Dwell Cycle: In a QMatrix acquisition method, the duration in which charge coupled from
X to Y is captured.
Acquisition: A single capacitive measurement process.
Electrode: Electrodes are typically areas of copper on a printed circuit board but can also
be areas of clear conductive indium tin oxide (ITO) on a glass or plastic touch screen.
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A Rotor is composed of 3 channels for a QTouch acquisition method.
A Rotor can be composed of 3 to 8 channels for QMatrix acquisition method.
A Slider is composed of 3 channels for a QTouch acquisition method.
A Slider can be composed of 3 to 8 channels for QMatrix acquisition method.
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