ATAVRQTOUCHX Atmel, ATAVRQTOUCHX Datasheet - Page 138

• 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

6.3.16.6 touch_at_param_t
structure
Input / Output
Use
Structure field
filter
outsens
sense
pthr
pdrift
ndrift
Refer
threshold), PDRIFT (Positive Drift rate) and NDRIFT (Negative Drift rate).
OUTSENS - Autonomous Touch Out-of-Touch Sensitivity.
For the autonomous QTouch sensor, specifies how sensitive the out-of-touch detector should be.
When the sensor is not touched, the Autonomous Touch Current count register is same as the
Autonomous Touch Base count register. When the sensor is touched the Autonomous Touch
Current count register decreases. When using the Autonomous QTouch in proximity mode, the
Autonomous Touch Base count register decreases as we move towards proximity of the sensor.
The OUTSENS value can be arrived at by watching the CAT Autonomous Touch Base Count
Register(at memory location 0xFFFF686Cu) and Autonomous Touch Current Count Register(at
memory location 0xFFFF6870u) during a sensor touch/proximity and not in touch/proximity. A
smaller difference between the Autonomous Touch Base count and Autonomous Touch Current
count register can be chosen as the OUTSENS value. Range: 0u to 255u.
SENSE - Autonomous Touch Sensitivity.
For the autonomous QTouch sensor, specifies how sensitive the touch detector should be.
When the sensor is not touched, the Autonomous Touch Current count register is same as the
Autonomous Touch Base count register. When the sensor is touched the Autonomous Touch
Current count register decreases. When using the Autonomous QTouch in proximity mode, the
Autonomous Touch Base count register decreases as we move towards proximity of the sensor.
The SENSE value can be arrived at by watching the CAT Autonomous Touch Base Count
Register(at memory location 0xFFFF686Cu) and Autonomous Touch Current Count Register(at
memory location 0xFFFF6870u) during a sensor touch/proximity and not in touch/proximity.
larger difference between the Autonomous Touch Base count and Autonomous Touch Current
count register can be chosen as the SENSE value. Range: 0u to 255u.
6.3.16.7 touch_qt_param_t
structure
Input / Output
Use
138
Section 5.3
touch_at_param_t
Passed as input to touch_at_sensor_update_config API & got as output from
touch_at_sensor_get_config API
Data structure which holds the configuration parameters for the autonomous
QTouch sensor
touch_qt_param_t
Passed as input to touch_qt_sensor_update_config API & got as output from
touch_qt_sensor_get_config API
Data structure which holds the status parameters for the QTouch Group A or
Group B sensor.
for an overview of FILTER (Detect Integration), PTHR (Positive Recalibration
Type
uint8 t
uint8 t
uint8 t
uint8 t
uint8 t
uint8 t
Corresponds to the device
register
ATCFG2
ATCFG2
ATCFG2
ATCFG3
ATCFG3
ATCFG3
Register Field
FILTER
OUTSENS
SENSE
PTHR
PDRIFT
NDRIFT
8207J-AT42-02/11
A