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PDF GSL1688 Data sheet ( Hoja de datos )
| Número de pieza | GSL1688 | |
| Descripción | Capacitive Touchscreen Controller | |
| Fabricantes | Silead | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de GSL1688 (archivo pdf) en la parte inferior de esta página. Total 23 Páginas | ||
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GSL1680, 1688 Capacitive Touchscreen Controller
Features
Highlight
o Outstanding anti RF, LCD and power supply interference
o Perfect soft-touch feeling
o Auto tuning and auto calibration
Number of Channels
o Up to 16x10
o Detect up to 10 fingers
o Scan order programmable
Zero Additional part Count
o Power bypass capacitor only
Signal Processing
o Advanced anti-interference signal processing using both hardware engine and firmware
o Self-Calibration
o Water and face suppression
o Down and up scaling support to match LCD resolution
o Support axis flipping and axis switch over for portrait and landscape modes
Scan Speed
o Maximum single touch up to 200Hz
o Configurable to allow power/speed optimization
Response times
o Initial latency < 10ms for first touch from idle
Sensors
o Support single layer ITO true multi-touch mutual capacitive sensor
o Support non-MoAlMo sensor
o Support OGS ( one glass sensor)
o Works with PET or glass sensors, including curved profiles
o Works with single or dual ITO layer
o Works with all proprietary sensor patterns on the markets
o Works with passive stylus
Panel Thickness
o Glass up to 2.5mm, screen size dependent
o Plastic up to 1.2mm, screen size dependent
Interface
o I2C compatible slave mode 400KHz.
o Interrupt to Host
Power
o Single Power supply, 2.6v~3.3v
1 Silead Inc. Capacitive Touchscreen Controller
1 page  
GSL1680, 1688 Capacitive Touchscreen Controller
7.2. Marking..............................................................................................................................................22
7.3. Part Numbers ....................................................................................................................................22
8. Revision History.........................................................................................................................................23
9. Contact.......................................................................................................................................................23
5 Silead Inc. Capacitive Touchscreen Controller
5 Page 
GSL1680, 1688 Capacitive Touchscreen Controller
capacitance of the electrode to ground. In such cases, ITO tracks should be replaced by screen printed
conductive inks (non-transparent) outside of the viewing area of the touchscreen.
A range of trade-offs also exist with regard to the number of layers and different patterns used
for construction. A single-layer ITO in diamond pattern or others offer a better clarity and cost
performance. However, the exposure of sensing channel to LCD screen makes it vulnerable to LCD
interference. A shield layer is sometimes added in the other side if the sensor glass/film to shield the
LCD interference.
Two-layer designs usually offers a more favorable RC time constant and the bottom layer can
shield the LCD interference in some degree if it’s used as the driving channels.
GSL168X is designed to work with all the existing single or two-layer design, glass or film,
diamond or strip patterns or their variance, and a wide range of RC time constant. The highly
automatically tuning and calibration technology used in GSL168X reduce the effort to change sensor
glass/film to the minimum.
GSL1688 is specially designed for the single layer ITO multi-touch mutual capacitive sensor.
These kinds of sensor have only one layer ITO, no need of metal bridge. It significantly simplifies the
mutual capacitive sensor production process. However, these sensors have a very high line resistance.
The GSL1688 can support up to 150K ohm line resistance which allows the use of thin ITO layer on film
whose square resistance is as big as 150 ohm.
3.2. Scanning Sequence
GSL168X supports up to 16 scanning channel and 10 sensing channels. The scanning channels are
scanned in sequence. However, the scan order is fully programmable. The sensing channels are full
parallelism. The channels are scanned by measuring capacitive changes at the intersections formed
between X0 and Y0 – Yn, then the intersections between X1 and Y0 – Yn, and so on, until all X and Y
combinations have been measured.
GSL168X can be configured in various ways, it is possible to disable some scanning or sensing
channels so that they are not scanned at all. This can be used to improve overall scanning time.
Although the sensing channels are parallel, the data order in the memory of each channel is fully
programmable. This provide the maximum flexibility to the FPC or PCB design. User can program the
scanning order or sensing data order through the Silead Ctouch Configure Suite or update the GSL168X
configuration file directly.
3.3. Touchscreen sensitivity
Sensitivity of touchscreens can vary across the extents of the electrode pattern due to natural
differences in the parasitic of the interconnections, control chip, and so on. An important factor in the
11 Silead Inc. Capacitive Touchscreen Controller
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet GSL1688.PDF ] | |
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