DMC TSC-52/U User manual

Analog Resistive Touch Screen Controller Board with Gesture Function
TSC-52/U User’s Guide

Document No. DEM-S0071A 1 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U 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
1.4. Supported Sizes of Touch Screens....................................................................................................4
1.5. Gesture function.................................................................................................................................4
2. Specifications..........................................................................................................................5
3. Connector................................................................................................................................. 7
3.1. Explanation of a connector terminal...................................................................................................7
3.2. The mounted connector......................................................................................................................7
4. Interface type........................................................................................................................... 8
4.1. Serial mode........................................................................................................................................8
4.2. USB mode..........................................................................................................................................8
5. Packing Specification ............................................................................................................. 9
5.1. Outline................................................................................................................................................9
5.2. Packing material.................................................................................................................................9
5.3. Outer case and lot label......................................................................................................................9
5.4. Product name label ..........................................................................................................................10
6. Changes & Improvements....................................................................................................11
6.1. Version History.................................................................................................................................11
7. Warranty.................................................................................................................................12
7.1. Warranty Period ...............................................................................................................................12
7.2. Warranty Target ...............................................................................................................................12
7.3. Warranty Exceptions ........................................................................................................................12
8. Precautions for Use ..............................................................................................................13
8.1. General Handling .............................................................................................................................13
8.2. Others...............................................................................................................................................13
Dimensional Drawing

Document No. DEM-S0071A 2 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
1. Product Overview
1.1. Products Applicable
This specification is applicable to TSC-52/U.
1.2. Overview
This is the IC to be used to realize gesture functions with 2-finger such as flick, pinch-in/pinch-out, rotation
along with recommended circuit for 4-wire resistive Touch Screen.
This is the controller IC to transform analog signals from 4-wire Touch Screen into coordinates data of
10-bit resolution using AD conversion and then send them to host computer. Filtering processing function in
the IC during detecting coordinates data enables to obtain stable coordinates data. Also using compensa-
tion function on the host computer side can compensate the coordinate deviation between an input point on
Touch Screen and a point of cursor indication and make them match to the one point.
§ TSC-52/U TSC-52/U 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 ena-
bles the mouse emulation on various operation systems and dispenses the need to
newly design the controller software.
TSC-52/U is lead-free and compliant with RoHS.

Document No. DEM-S0071A 3 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
1.3. Peripheral Composition Overview
A 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 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-coordinates electric circuits and the other as a Y-coordinates circuits. To measure the X-coordinates
TSC-52/U supplies voltage, Vcc to the one of X-coordinates electrodes with GND to the other. When the
touch screen is pressed under this environment the voltage of the X-coordinates resistance is detected by
the Y-coordinates electrode (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-52/U calculates coordinates data starting from A/D con-
version 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.)
Vcc = 5.0V
xl
A_in
X-resistive-layer
Y-resistive-layer
Touch
Vcc
(TSC-52/IC)
E
D
C
B
A
(Touch Screen)
TSC-52/U
(RS-232C/USB)
To host
Y-resistive-layer
X-resistive-layer (reverse side)
xl
X electrode
(reverse side)
Y electrode
Vcc
A_in

Document No. DEM-S0071A 4 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
1.4. Supported Sizes of Touch Screens
The supported sizes of touch screen is from 4.3inch Wide to 21.5inch Wide in DMC's 4-wire resistive touch
screen lineups. (LST touch screen series is recommended)
*Please note that pin pitch of LST 4.3inch model is different from other LST models .
([TSC-52/U] is for 1.25mm pin pitch while pin pitch of LST 4.3inch model is 1.00mm)
For LST 4.3inch model, please use another controller, [TSC-52/U-F].
1.5. Gesture function
(1) Pinch-in/Pinch-out
Pinch-out is defined as the motion that when 2 points are input, the distance between them
moves bigger. While Pinch-in is defined as the motion that when 2 points are input, the dis-
tance between them moves narrower. There are two case in Pinch-in/Pinch-out as shown be-
low.
(2) Rotation
Rotation is defined as the motion that when 2 points are input, the both 2 points rotate clock-
wise or counter-clockwise with the mid point as center, and one point rotates with the other
fixed as center.
Figure1 Both 2 points move
(Mid point)
Figure2 2 points are touched, but
only 1 point moves with the other
as the fixed point.
Pinch-in
1st. point
(Mid point)
2nd. point
2nd. point
1st. point
Pinch-out
(Mid point)
(Mid point)
1st. point
1st. point
Pinch-in
Pinch-out
2nd. point
(Fixed)
2nd. point
(Fixed)
Figure3 Both 2 points rotate
1st. point
Figure4 One point is fixed and the other is rotated.
Mid point (center)
1st. point
Mid point
2nd. point
(Fixed center)
2nd. point

Document No. DEM-S0071A 5 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
2. Specifications
General Specifications
Item
Rating
Remarks
Operating Temp.
Serial/USB
-20°C to +85°C
No dew condensation
Storing Temp.
Serial/USB
-20°C to +85°C
No dew condensation
Supply Voltage
DC 5.0V 5[%]
Consumption Current
55mA (TYP)
In USB mode, Vin=5.0V,
one point touch input.
Correspondence
(Serial)
Format
Asynchronous Serial
Fixed value
Transfer Rate
9600bps
Data Format
8bit
Stop Bit
1bit
Parity
None
Correspondence
(USB)
Spec
USB Specification 2.0 Full Speed
Transfer Mode
Interrupt transfer (coordinate)
Device class
HID
Frequency
16MHz
16MHz fixed
Dimension
30 x 53 mm
Max height of components
4.8 mm

Document No. DEM-S0071A 6 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
Performance Specifications
Description
Rating
Note
Coordinate Output Rate (point/sec)
150p/s
Coordinate Resolution
10bit (1024 x 1024)
The value will be lower in the active
area of the touch screen
Linearity Error
3 LSB
Input Response Time
10ms (TYP)
2-point Input Resolution
Min. 2-point input-able
distance: 7mm typ.
After gesture calibration :
4mm typ.
with LST-121B080A (12.1in)
*Refer to the graph shown below
Note：This product does not guarantee position accuracy in two-point(two-finger) touching
since it is a touch screen controller exclusively designed for realizing gesture functions with
two-finger touch.

Document No. DEM-S0071A 7 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
3. Connector
3.1. Explanation of a connector terminal
CN
Terminal
Name
Function
CN1
1
Vin
Power Input
2
GND
GND
CN2
1
Vbus
USB Vbus
2
D-
USB D-
3
D+
USB D+
4
GND
USB GND
5
Shield
USB FG
CN3
1
Dout
RS-232C Data Output
2
Din
RS-232C Data Input
3
GND
RS-232C GND
CN5
1
XL
Touch screen Input XL.
2
YU
Touch screen Input YU.
3
XR
Touch screen Input XR.
4
YD
Touch screen Input YD.
CN8
1
I2C0_SDA
Unused
2
I2C0_SCL
Unused
3
TEST1
Unused
4
GND
Unused
3.2. The mounted connector
CN
P/N
Manufacturer
CN1
S2B-PH-K-S
J.S.T. Mfg Co., Ltd
CN2
S5B-PH-K-S
J.S.T. Mfg Co., Ltd
CN3
S3B-PH-K-S
J.S.T. Mfg Co., Ltd
CN5
IMSA-9604S-04F
IRISO ELECTRONICS Co., Ltd
CN8
S2B-PH-K-S
J.S.T. Mfg Co., Ltd

Document No. DEM-S0071A 8 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
4. Interface type
TSC-52/U 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-52/U and computer. Because it may cause malfunction.
4.1. Serial mode
In serial mode, please use CN3 for connecting to host computer, and CN1 for power supply.
Specifications
Transmission format:Asynchronous serial
Transfer rate: 9600bps
Data format: 8 bit
Stop bit: 1 bit
Parity: None
4.2. USB mode
In USB mode, please use CN2 for connecting to host computer.
Specifications
Transmission spec: USB Specification 2.0 Full Speed
Transfer mode: Interrupt transfer (Coordinate)
Device class: HID

Document No. DEM-S0071A 9 Rev.1.1 ©2020 DMC Co., Ltd.
TSC-52/U User’s Guide
5. Packing Specification
5.1. Outline
TSC-52/U 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: 75 x 55 x 15 mm, clay coated newsback board
Cushioning: 120 x 70 mm, air packing, static protection
5.3. Outer case and lot label
T S C - 52/U
Lot number
Sample: 3I09
3: the last digits of the year
I: Month Jan : A Jul : G
Feb : B Aug : H
Mar : C Sep : I
Apr : D Oct : J
May : E Nov : K
Jun : F Dec : L
09: Date manufactured
Product name, DMC logo
3I09