Microchip AT42QT1085 Handleiding


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9625D–AT42–05/2013
Features
QTouch® Sensor Channels
Up to eight keys
Integrated Haptic Engine
Haptic events may be triggered by touch detection or controlled by a host
microcontroller over SPI
Data Acquisition
QTouchADC key measurement/touch detection method
Configurable measurement timing and averaging
Spread spectrum charge transfer
Raw data from channel measurement can be read over the SPI interface
GPIO Pins
12 dedicated bi-directional GPIO pins, plus up to 4 additional pins (replacing keys)
Configurable as software PWM Drive, digital inputs or outputs
Device setup
Device configuration may be stored in NVRAM
Operation
Power-On reset and brown-out detection
Internal calibrated oscillator
Key Outline Sizes
6 mm × 6 mm or larger (panel thickness dependent); widely different sizes and shapes
possible, including solid or ring shapes
Key Spacing
7 mm or more, center to center (panel thickness dependent)
Layers required
One
Electrode Materials:
Etched copper, silver, carbon, ITO
Electrode Substrates:
PCB materials; polyamide FPCB; PET films, glass
Panel materials:
Plastic, glass, composites, painted surfaces (low particle density metallic paints
possible)
Panel Thickness:
Up to 10 mm glass, 5 mm plastic (electrode size dependent)
Key Sensitivity:
Individually configured over SPI interface
Signal Processing:
Self-calibration, auto drift compensation, noise filtering
Patented Adjacent Key Suppression
® (AKS®) technology to ensure accurate key
detection
Interface:
Master/Slave SPI interface, up to 750 kHz
Object-based communications protocol
Power:
2.0 V to 5.5 V
Packages:
32-pin 5 × 5 mm QFN RoHS compliant
32-pin 7 × 7 mm TQFP RoHS compliant
Atmel AT42QT1085
Eight-key QTouch® Touch Sensor IC
DATASHEET
2AT42QT1085 [DATASHEET]
9625D–AT42–05/2013
1. Pinout and Schematic
1.1 Pinout Configuration
GPIO11
GPIO10
RESET
CHANGE
KEY3
KEY2
GPIO6
GPIO7
GPIO8
HAPTIC_PWM
SS
MOSI
MISO
GPIO0
GPIO1
GPIO2
VDD
VSS
GPIO3
GPIO5 SCK
AVDD
KEY6 / GPIO13
GPIO9
VSS
KEY7 / GPIO12
KEY0
KEY1
1
2
3
4
5
6
7
8 17
18
19
20
21
22
23
24
32 31 30 29 28 27 26 25
9 10 11 1615141312
HAPTIC_EN
GPIO4
KEY4 / GPIO15
KEY5 / GPIO14
AT42QT1085
3
AT42QT1085 [DATASHEET]
9625D–AT42–05/2013
1.2 Pinout Descriptions
Table 1-1. Pin Listing
Pin Name Type Comments
If Unused, Connect
To...
1 GPIO0 I/O General Purpose IO Leave open
2 GPIO1 I/O General Purpose IO Leave open
3 GPIO2 I/O General Purpose IO Leave open
4 P VDD Power
5 P VSS Ground
6 GPIO3 I/O General Purpose IO Leave open
7 GPIO4 I/O General Purpose IO Leave open
8 GPIO5 I/O General Purpose IO Leave open
9 GPIO6 I/O General Purpose IO Leave open
10 GPIO7 I/O General Purpose IO Leave open
11 GPIO8 I/O General Purpose IO Leave open
12 HAPTIC_EN O Enable pin for haptic amplifier Leave open
13 HAPTIC_PWM O Drive for haptic effects Leave open
14 SS I SPI Enable Pull up to VDD via a
100 k resistor
15 MOSI I SPI Data In Leave open
16 MISO O SPI Data Out Leave open
17 SCK I SPI Clock Leave open
18 AVDD P Analog Power
19 KEY6 / GPIO13 I/O Sense pin / General Purpose IO Leave open
20 GPIO 9 I/O General purpose IO Leave open
21 VSS P Ground
22 KEY7 / GPIO12 I/O Sense pin / General Purpose IO Leave open
23 KEY0 I/O Sense pin Leave open
24 KEY1 I/O Sense pin Leave open
25 KEY2 I/O Sense pin Leave open
26 KEY3 I/O Sense pin Leave open
27 KEY4 / GPIO15 I/O Sense pin / General Purpose IO Leave open
28 KEY5 / GPIO14 I/O Sense pin / General Purpose IO Leave open
29 RESET I Reset, internal pull-up Leave open


Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: AT42QT1085

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