ATQT600 Atmel, ATQT600 Datasheet - Page 61

• Manufacturer Part Number: ATQT600
• Description: KIT EVAL TOUCH FOR QT600
• Manufacturer: Atmel
• Series: QTouch™r

Specifications of ATQT600

• Sensor Type: Touch Screen
• Interface: USB
• Embedded: Yes, Other
• Utilized Ic / Part: ATtiny88, ATmega324PA, ATxmega128A1
• Processor To Be Evaluated: ATtiny88, ATmega324, ATxmega128
• Data Bus Width: 8 bit, 16 bit
• Interface Type: USB
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 1.6 V to 3.6 V
• Silicon Manufacturer: Atmel
• Kit Application Type: Sensor
• Application Sub Type: Touch Sensor
• Kit Contents: USB Bridge, MCU Cards, Touchpad Cards
• Svhc: No SVHC (15-Dec-2010)
• Mcu Supported Families: ATtiny88,
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6.3.4.3
Touch Sensors Design Guide
Wheel
To form a wheel, the design is simply is wrapped around to form a circle, with the X segments becoming
wedge shaped (see
many Y “circles” as necessary to ensure a maximum gap of 4 mm between them.
Figure 6-5.
Center diameter depends on
the number of Y traces,
the spacing of Y traces,
the number of X electrodes, etc.
Note the maximum outer arc length
0.1–0.5 mm
Gap Between
X Electrodes
Two-layer Small Wheel: Multiple Y Traces (Spatially Interpolated)
Figure
1.5–4 mm
X5
X6
2–4 mm
6-5). Note that, as with the Y “stripes” in the slider design, there should be as
X4
Y, 0.1
–0.5
X7
mm Width
Mutual-capacitance One-dimensional Sensors
X0
Y should connect on layer
below X if possible
X3
X2
Outer Arc
<8 mm
X1
10620D–AT42–04/09
6-7