Analog Resistive Touch Screen Controller
TSC-35/RU User’s Guide
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 com-
pliant with RoHS.
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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 func-
tions 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 oth-
ers GND. When the touch screen is pressed under this environment the voltage of the X-coordinates re-
sistance is detected by the detection layer (A_in) at the input point (x1), where the X-Y coordinate resis-
tance 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.
(Detection layer)
Vcc = 5.0V
A_in
xl
Output Data
A_in
0V
1.25V
2.5V
3.75V
5V
A
B
C
D
E
0000h (Min.)
00FFh
5V
(Drive layer)
01FFh
02FFh
03FFh (Max.)
D
E
C
B
A
(TSC-35/RU)
Touch
(Touch Screen)
Detection layer
xl
(TSC-30/IC)
A_in
To host
Drive layer
D
Vcc
E
C
B
A
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TSC-35/RU User’s Guide
2. Specifications
General Specifications
Item
Rating
Remarks
Operating Temp.
Serial/USB
Serial/USB
0°C to +70°C
No dew condensation
Storing Temp.
Supply Voltage
-20°C to +85°C
No dew condensation
DC 3.0V to 3.6V
DC 4.5V to 5.25V
Serial
USB
DC 4.0V to 5.25V
In serial mode, 50p/s,
Vin=5.0V, touch screen is
activated.
Consumption Current
51mA
Format
Asynchronous Serial
9600bps
Transfer Rate
Correspondence
(Serial)
Fixed value
Data Format
Stop Bit
Parity
8bit
1bit
None
Spec
USB Specification 2.0 Full Speed
Control transfer (command)
Interrupt transfer (coordinate)
Vendor definition
Correspondence
(USB)
Transfer Mode
Device class
Frequency
Dimension
6MHz
30 x 53 mm
4.8 mm
6MHz fixed
Max height of components
Performance Specifications
Description
Rating
Note
(1) point mode
(2) 30p/s
(4) 80p/s
(3) 50p/s
(5) 100p/s
Default: 50pps with DMC original
driver software.
Coordinate Output Rate (point/sec)
Coordinate Resolution
(6) 130p/s (7) 150p/s
The value will be lower in the active
area of the touch screen
10bit (1024 x 1024)
Linearity Error
±3 LSB
Input Response Time
10ms (TYP)
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TSC-35/RU User’s Guide
3. Connector
3-1. Explanation of a connector terminal
CN
Terminal Name
Function
1
2
3
4
5
UR
LR
5 wire Touch screen UR Input
5 wire Touch screen LR Input
CN1
Sense Coordinate detection
UL
LL
5 wire Touch screen UL Input
5 wire Touch screen LL Input
1
2
3
4
5
Vbus
D-
USB Vbus
USB D-
CN4*1
D+
USB D+
GND
USB GND
Shield USB FG
1
2
3
Dout
Din
RS-232C Data Output
CN5
CN6
RS-232C Data Input
RS-232C GND
GND
1
2
Vin
Power Input
GND
GND
*1: When you use it at 3.3V of the serial mode, please do not connect TSC-35/RU to Vbus of CN4.
3-2. The mounted connector
CN
P/N
Manufacturer
CN1
CN4
CN5
CN6
RE-H052SD-1110
S5B-PH-K-S
S3B-PH-K-S
S2B-PH-K-S
J.S.T. Mfg Co., Ltd
J.S.T. Mfg Co., Ltd
J.S.T. Mfg Co., Ltd
J.S.T. Mfg Co., Ltd
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4. Interface type
TSC-35/RU has serial and USB interface type. You choose either type. You cannot use both these at the
same time.
(Notice) In the state that connected a serial and a USB cable to a computer, please do not start power on
of TSC-35/RU and computer. Because it may cause malfunction.
4-1. Serial mode
In serial mode, please use CN5 for connecting to host computer, and CN6 for power supply.
Specifications
Transmission format:Asynchronous serial
Transfer rate:
Data format:
Stop bit:
9600bps
8 bit
1 bit
Parity:
None
4-2. USB mode
In USB mode, please use CN4 for connecting to host computer. When you input power supply from CN6,
please connect also the Vbus line of the USB (CN4). Because TSC-35/RU recognizes that it was con-
nected to the host computer with a Vbus line.
Specifications
Transmission spec: USB Specification 2.0 Full Speed
Transfer mode:
Device class:
Control transfer (Command) / Interrupt transfer (Coordinate)
Vendor definition
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5. Packing Specification
5-1. Outline
TSC-35/RU is wrapped up in the air packing of the prevention of static protection type and puts it in a
packing box.
5-2. Packing material
Outer case:
Cushioning:
75 x 55 x 15 mm, clay coated newsback board
120 x 70 mm, air packing, static protection
5-3. Outer case and lot label
Lot number
Sample: 7J20
7: the last digits of the year
J: Month Jan : A
Jul : G
Feb : B Aug : H
Mar : C Sep : I
Apr : D
May : E Nov : K
Jun : F Dec : L
20: Date manufactured
Oct : J
T S C - 3 5 / R U
Product name, DMC logo
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5-4. Product name label
Backside of board
TSC-35/RU: Product name
Lot#: 7J20
7: the last digits of the year
J: Month Jan : A
Jul : G
Feb : B Aug : H
Mar : C Sep : I
Apr : D
May : E Nov : K
Jun : F Dec : L
Oct : J
20: Date manufactured
Rev: Revision information
(PbFree): lead free
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6. Changes & Improvements
6-1. Version History
§
TSC-35/RU
Ver0.1 (January 15, 2008)
Draft release
Ver 1.0 (March 13, 2008)
First release
(Change from ver0.1)
2. Specifications
Consumption Current and Input Response Time were added.
2. Specifications
Operating Temp Serial -20°C to +85°C → -20°C to +75°C :spec review
Dimensional Drawing
Revision 1 for first release
Ver 1.1 (March 26, 2008)
2. Specifications
Operating Temp Serial -20°C to +75°C → 0°C to +70°C :spec review
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7. Warranty
7-1. Warranty Period
§ The warranty period is limited to 1 year from the date of shipping. The warranty for the initial defection
such as appearance defection is limited to 1 month.
§ Any defected parts under proper use will be examined by the supplier and replaced by the new parts if
the defection is considered to be caused by the supplier.
§ The replacement is subject to be included in the next lot.
7-2. Warranty Target
§ The warranty only covers the product itself and does not cover any damage to others caused by using
this product. Onsite repair or replacement is not supported.
§ We will do our best for delivery problem and product defections, but the warranty for the production line
is not covered.
7-3. Warranty Exceptions
Following conditions are not covered with the warranty and subject to charge.
§ Any malfunctions and damages during transportation and transfer by the user.
§ Any malfunctions and damages caused by a natural disaster or a fire.
§ Any malfunctions and damages caused by static electricity
§ Any malfunctions and damages caused by the failure of the associated equipment.
§ If the product is remodeled, disassembled or repaired by the user.
§ If the product is glued onto the equipment and uninstalled.
§ Any malfunctions and damages caused by an improper usage and handling against the specifications
and notes.
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8. Precautions for Use
8-1. General Handling
§ Keep the product away from any conductive objects while in use.
§ Do not touch the conductive part of the product to avoid being damaged by the electrostatic discharge.
Follow the proper procedure for handling.
§ Keep the product in the proper storing environment and avoid any load to the product.
§ Do not use or store the product in the severe condition like following:
Wet environment or a condition where the product is likely to get wet.
Where dew condensation is likely to occur.
Near solvent or acid.
§ Do not take apart or alter the product.
8-2. Others
§ The contents of this document are subject to change without notice.
§ The manufacturer or sales representatives will not be liable for any damages or loss arising from use of
this product.
§ This product is intended for use in standard applications (computers, office automation, and other office
equipment, industrial, communications, and measurement equipment, personal and household devices,
etc.) Please avoid using this product for special applications where failure or abnormal operation may
directly affect human lives, or cause physical injury or property damage, or where extremely high levels
of reliability are required (such as aerospace systems, vehicle operating control, atomic energy controls,
medical devices for life support, etc.).
§ Any semiconductor devices have inherently a certain rate of failure. The user must protect against injury,
damage, or loss from such failures by incorporating safety design measures into the user’s facility and
equipment.
TSC-35/RU User’s Guide
Rev. 1.1, March 26, 2008
©2008 DMC Co., Ltd.
This document can be freely distributed, but any alternation to this document is prohibited.
DMC Co., Ltd.
9th floor, Kanda Sento Building, 1-2-4 Yushima, Bunkyo-Ku, Tokyo 113-0034, Japan
Phone: +81-3-5209-7131 (Japanese), 7135 (English) Fax: +81-3-5209-7130
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