DMC TSC-35/RU User Manual
Analog Resistive Touch Screen Controller
TSC-35/RU User’s Guide
Document No. DER-S0075A 1 Rev.1.3 ©2011 DMC Co., Ltd.
TSC-35/RU User’s Guide
Table of Contents
1. Product Overview....................................................................................................................2
1-1. Products Applicable ...........................................................................................................................2
1-2. Overview ............................................................................................................................................2
1-3. Peripheral Composition Overview ......................................................................................................3
2. Specifications..........................................................................................................................4
3. Connector.................................................................................................................................5
3-1. Explanation of a connector terminal ...................................................................................................5
3-2. The mounted connector .....................................................................................................................5
4. Interface type...........................................................................................................................6
4-1. Serial mode ........................................................................................................................................6
4-2. USB mode.......................................................................................................................................... 6
5. Packing Specification............................................................................................................. 7
5-1. Outline................................................................................................................................................7
5-2. Packing material.................................................................................................................................7
5-3. Outer case and lot label .....................................................................................................................7
5-4. Product name label ............................................................................................................................8
6. Changes & Improvements......................................................................................................9
6-1. Version History...................................................................................................................................9
7. Warranty................................................................................................................................. 10
7-1. Warranty Period ...............................................................................................................................10
7-2. Warranty Target ...............................................................................................................................10
7-3. Warranty Exceptions ........................................................................................................................10
8. Precautions for Use ..............................................................................................................11
8-1. General Handling .............................................................................................................................11
8-2. Others ..............................................................................................................................................11
Dimensional Drawing
Document No. DER-S0075A 2 Rev.1.3 ©2011 DMC Co., Ltd.
TSC-35/RU User’s Guide
1. Product Overview
1-1. Products Applicable
This specification is applicable to TSC-35/RU.
1-2. Overview
TSC-35/RU is 5 wire touch screen controller board that performs an A/D conversion of an analog signal of
a 5 wire resistive touch screen, and transmits the coordinate data to the host in a 10-bit resolution serial
correspondence at 9600bps and USB. TSC-35/RU can be used for various applications for its functions
including the power saving mode, seven sampling speed settings (max. 150p/s *1), two external switch
connections, and automatic calibration data loading with an external EEPROM.
§ TSC-35/RU TSC-35/RU dispenses a need to newly design the peripheral circuits, and can easily
be used by connecting to the touch screen and the host. Using the driver software *2
enables the mouse emulation on various operation systems and dispenses the need
to newly design the controller software.
TSC-35/RU is the product compatible with software of the TSC-25 series.
*1: 150 transmissions of coordinate data per second.
*2: Please contact the local sales representatives for software availability.
TSC-35/RU is a succeeding model of the boards of the TSC-25 series. TSC-35/RU is lead-free and compliant with RoHS.
Document No. DER-S0075A 3 Rev.1.3 ©2011 DMC Co., Ltd.
TSC-35/RU User’s Guide
1-3. Peripheral Composition Overview
5 wire resistive touch screen is operated by resistance sensitive system between two layers such as film or
glass. Two pieces of transparent materials with conductive coating are placed in the same direction as
two electrodes face each other. The 5 wire touch screen is activated when these transparent conductive
layers are pressed to contact each other with a finger or a pen. The one of these conductive layers functions as an X/Y-coordinates electric circuits and the other as a detection circuits.
To measure the X-coordinates, TSC-35/RU makes two corners Vcc among four corners. And makes others GND. When the touch screen is pressed under this environment the voltage of the X-coordinates resistance is detected by the detection layer (A_in) at the input point (x1), where the X-Y coordinate resistance layers make contact. The detected voltage in supply side is higher than the GND side, which
means ‘A_in’=Vcc at the point ‘E’ and ‘A_in’=0(*1) at the point ‘A’. TSC-35/RU calculates coordinates
data starting from A/D conversion of the ‘A_in’ voltage. The Y-coordinates is measured in the same way.
By repeating this process alternately, coordinate value at the input point is determined.
(*1) Excluding the loss in the controller circuits and touch screen. Actual detected voltage should be
lower than ‘Vcc - GND’ because of loss happened in the circuitry.
xl
A_in
Output Data
A
0V
0000h (Min.)
B 1.25V 00FFh
C 2.5V 01FFh
D 3.75V 02FFh
E 5V 03FFh (Max.)
V
cc
= 5.0V
5V
E
D
C B
A
(Drive layer)
(Detection layer)
A_in
A_in
(TSC-30/IC)
(TSC-35/RU)
(RS-232C/USB)
To host
xl
Detection layer
Touch
(Touch Screen)
Drive layer
E D C B A
Vcc
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