ATAVRTS2080B Atmel, ATAVRTS2080B Datasheet - Page 15
![BOARD EVAL FOR ATTINY88 LIBRARY](/photos/9/18/91800/atavrts2080b_sml.jpg)
ATAVRTS2080B
Manufacturer Part Number
ATAVRTS2080B
Description
BOARD EVAL FOR ATTINY88 LIBRARY
Manufacturer
Atmel
Series
QTouch™r
Specifications of ATAVRTS2080B
Sensor Type
Touch, Capacitive
Sensing Range
1 Rotor, 1 Slider, and 2 Buttons/Keys
Interface
Application Programming Interface (API)
Voltage - Supply
1.8 V ~ 5.5 V
Embedded
Yes, MCU, 8-Bit
Utilized Ic / Part
ATtiny88
Tool Type
Development Kit
Cpu Core
AVR 8 / 32
Data Bus Width
8 bit
Core Architecture
AVR
Silicon Manufacturer
Atmel
Silicon Core Number
ATtiny88
Silicon Family Name
AVR
Kit Contents
Board CD Docs
Development Tool Type
Hardware / Software - Eval/Demo Board
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Sensitivity
-
Lead Free Status / Rohs Status
Details
Other names
Q4359953
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QMatrix uses a pair of sensing electrodes for each channel. One is an emitting electrode into
which a charge consisting of logic pulses is driven in burst mode. The other is a receive electrode
that couples to the emitter via the overlying panel dielectric. When a finger touches the panel the
field coupling is changed, and touch is detected. The drive electrode (or drive line) used for
QMatrix charge transfer is labeled as the X line. The receiver electrode (or receive line) used for
QMatrix charge transfer is labeled as the Y line.
QMatrix circuits offer good immunity to moisture films, extreme levels of temperature stability,
superb low power characteristics, and small IC package sizes for a given key count.
5.2.3
5.3 Global settings common to all sensors of a specific acquisition
The touch sensing using QTouch library could be fine tuned by using a number of configurable
settings. This section explains the settings that are common to all sensors of a specific acquisition
method like QMatrix or QTouch.
method
Sensor schematics for a QMatrix acquisition method design
Atmel MCU
Figure 5-5 : Schematics for a QMatrix acquisition method design
YmA
YmB
SMP
Y0A
Y0B
Vref
X0
Xn
RYB0
CS0
...
CSm
RYBm
RYm
RX0
RXn
RY0
...
...
Typical values:
RX: 1k
RY: 1k
CS: 4.7nF
RYB: 470k
----------------------------------
Port-pin count =
n + (2 * m) + 2
n – number of X lines
m – number of Y lines
----------------------------------
Port requirements:
X: Configurable I/O pin
YA:Configurable I/O pin (*)
YB: ADC port (*)
SMP: Configurable I/O pin
Vref: AIN0 (Comparator)
(*): The port I/O pin should
be in consecutive order
Sensor
Sensor
0,0
n,0
Sensors,
X,Y
Sensor
Sensor
0,m
n,m
15
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