ATAVRQTOUCHX Atmel, ATAVRQTOUCHX Datasheet - Page 37

• 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

5.6.6.1.1.3 Channel numbering when routing SNS and SNSK pins to the same port
When SNS and SNSK pins are connected to the same port, the even pin numbers will be used as
SNS pins and the odd pins will be used as the SNSK pins.
Figure 5-8 : Channel numbering for QTouch acquisition method when the SNS and SNSK
pins are connected to the same port
5.6.6.1.1.4 Channel numbering when routing SNS and SNSK pins to the same port with
When SNS and SNSK pins are connected to the same port, different pins can be used as SNS
and SNSK pins.But SNS and SNSK pins are configured with few rules keeping in mind as
illustrated in section
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•
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SNS and SNSK pins are configured with few rules keeping in mind as illustrated in
section
Pins A0 ,A1,A4 and A6 of PORT A are SNS pins and pins B2,B3,B5,B7 are SNSK pins of
PORT B.
Channel 0 will be forming a SNS-SNSK pair as A0B2.
Channel 1 will be forming a SNS-SNSK pair as A1B3
Channel 2 will be forming a SNS-SNSK pair as A4B5
Channel 3 will be forming a SNS-SNSK pair as A6B7.
The channel numbering is not dependent on the pin numbering.
The number of channels supported will be limited 4 channels for an 8-bit device and 16
channels for a 32-bit device (e.g. UC3).
For e.g., for a 4 channel configuration where the SNS and SNSK pins are connected to
Port B, the port pins 0&1 are used for channel 0.
The channel number is derived from the position of the pins used for SNS and SNSK
lines for any channel.
o
Example:
Pins A0 ,A3 and A5 of PORT A are SNS pins and pins A2,A4,A7 are SNSK pins of PORT
A.
Channel 0 will be forming a SNS-SNSK pair as A0A2.
For e.g., pins 4 and 5 are connected to a SNS/SNSK pair and the channel number
associated with the SNS/SNSK pin is 2.
pin configurability
channel number = floor( [SNS(or SNSK) pin number] / 2 )
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