ATQT600 Atmel, ATQT600 Datasheet - Page 167
ATQT600
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATQT600
Manufacturer:
Atmel
Quantity:
135
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6.5.4
For the QTouch Libraries, the timing information is provided by the Host Application by updating
the ‘time_current_ms’ variable in the Timer ISR.
calculate the necessary timing for Max ON Duration, Drift and Recalibration functionality. Before
using the QTouch Libraries, the Timer ISR must be configured appropriately. Also, the Timer
Interrupt is used to update the ‘time_to_measure_touch’ variable inorder to start a capacitive
touch measurement.
The touch_config.h configuration header file must be used to set the number of channels and
charge share delay based on the library used. For example, if the library used is a 12 channel
library
CHARGE_SHARE_DELAY must be specified as 2 in the touch_config_dp.h. This information
must be provided irrespective of the number of channels actually used.
The desired number of touch buttons used can be enabled using the qt_enable_key() routine.
The channel numbers are sequential from Port A through Port B. Also, individual sensor
Threshold, Hysteresis, AKS group and Recalibration parameters can be set using this function
call.
accessing the global configuration data structure.
When developing a Host application for ATtiny40 device, ensure that the ADC prescalar is set in
such a way that it is in the range of 50 KHz to 250 KHz. For example, if the main clock is running
at 8MHz then set the ADC prescalar to 32 or more. This must be done to ensure proper touch
sensing acquisition.
The Sensor Global Configuration parameters can also be set by the user by directly
API Flow diagram for ATtiny40
with
2
csd
then
QT_NUM_CHANNELS
The QTouch Library uses this variable to
must
be
specified
as
12
and
167
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