Touchscreen Support; Crt Support; Jumper Selection; Adjustable Lcd Bias Power Supply - Epson S1D13505 Technical Manual

Epson Research and Development
Vancouver Design Center

2.1.3 Touchscreen Support

2.1.4 CRT Support

2.1.5 Jumper Selection

Note

2.1.6 Adjustable LCD BIAS Power Supply

Evaluation Board User Manual
Issue Date: 01/02/05
If the LCD panel being used has an integrated Touchscreen, the touchscreen interface signals are
connected to header strip TS1. These signals are then routed through JP3 and into the standard
"Platform II Audio/Touch" peripheral board. Pinout assignment is described in the table below.
Table 2-2: Touchscreen Header (TS1) Pinout
Pin #
1
2
3
4
5
6
The S1D13505 has an embedded RAMDAC and provides complete one-chip CRT support. Refer to
the Programmer's Notes and Examples, document number X23A-G-003-xx, for programming
details.
Jumpers labelled LCDVCC1 and FPS2 provide LCD logic supply voltage and connector pinout
options respectively. Jumper options are described in the table below.
Table 2-3: Touchscreen Header Pinout
Jumper Function
LCDVCC1 LCD logic supply
FPS2 FPSHIFT2/DRDY/MOD
= default settings
Setting the panel supply voltage to 5V does not affect the signalling voltage which remains at
3.3V.
Many color passive LCD panels require a positive power supply to provide the LCD BIAS voltage.
Such a power supply has been provided as an integral part of this design. The signal VDDH can be
adjusted by R16 to provide an output voltage from +24V to +38V (I
enabled/disabled by the S1D13505 control signal LCDPWR.
Signal
XR
XL
YU
YL
XY
GND
1-2 2-3
3.3V 5V
To pin 38 To pin 35
Page 11
= 45mA) and is
out
S5U13505-D9000
X23A-G-002-04