ATAVRQTOUCHX Atmel, ATAVRQTOUCHX Datasheet - Page 2

• 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

Table of Contents
Table of Contents................................................................................................2
1
2
3
4
5
2
4.1
5.1
5.2
5.3
5.4
5.5
5.6
Preface...........................................................................................................9
Introduction .................................................................................................10
Overview ......................................................................................................10
Abbreviations and Definitions ...................................................................11
Generic QTouch Libraries ..........................................................................12
5.2.1
5.2.2
5.2.3
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.5.1
5.5.2
5.6.1
5.6.2
5.6.3
5.6.4
5.2.1.1
5.6.3.1
5.6.3.2
5.6.4.1
5.6.4.2
Definitions........................................................................................................................ 11
Introduction...................................................................................................................... 12
Acquisition Methods ........................................................................................................ 13
Global settings common to all sensors of a specific acquisition method........................ 15
Sensor specific settings .................................................................................................. 18
Using the Sensors........................................................................................................... 20
QTouch API and Usage .................................................................................................. 21
5.6.3.2.1
5.6.3.2.2
5.6.3.2.3
5.6.3.2.4
5.6.3.2.5
5.6.3.2.6
QTouch acquisition method....................................................................................................13
QMatrix acquisition method....................................................................................................14
Sensor schematics for a QMatrix acquisition method design .................................................15
Recalibration Threshold .........................................................................................................16
Detect Integration...................................................................................................................16
Drift Hold Time .......................................................................................................................16
Maximum ON Duration...........................................................................................................17
Positive / Negative Drift ..........................................................................................................17
Positive Recalibration Delay...................................................................................................18
Detect threshold .....................................................................................................................18
Hysteresis ..............................................................................................................................18
Position Resolution ................................................................................................................19
Position Hysteresis.................................................................................................................19
Adjacent Key Suppression (AKS)...........................................................................................20
Avoiding Cross-talk ................................................................................................................20
Multiple measurements ..........................................................................................................20
QTouch Library API................................................................................................................21
touch_api.h - public header file ..............................................................................................21
Type Definitions and enumerations used in the library...........................................................21
Data structures.......................................................................................................................24
Sensor schematics for a QTouch acquisition method design .......................... 14
Typedefs ........................................................................................................... 21
Enumerations.................................................................................................... 21
qt_touch_status_t ............................................................................................. 24
qt_touch_lib_config_data_t............................................................................... 25
sensor_type_t ............................................................................................... 21
aks_group_t .................................................................................................. 22
channel_t ...................................................................................................... 22
hysteresis_t................................................................................................... 22
resolution_t ................................................................................................... 23
recal_threshold_t .......................................................................................... 23
8207J-AT42-02/11