sed1355 ETC-unknow, sed1355 Datasheet - Page 363

• Manufacturer Part Number: sed1355
• Description: Sed1355 Embedded Ramdac Lcd/crt Controller
• Manufacturer: ETC-unknow

Epson Research and Development
Vancouver Design Center
2.1.3 Touchscreen Support
2.1.4 CRT Support
2.1.5 Jumper Selection
2.1.6 Adjustable LCD BIAS Power Supply
Evaluation Board User Manual
Issue Date: 98/10/30
Note
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.
The SED1355 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.
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 SED1355 control signal LCDPWR.
Setting the panel supply voltage to 5V does not affect the signalling voltage which remains at
3.3V.
LCDVCC1
Jumper
FPS2
Table 2-2: Touchscreen Header (TS1) Pinout
Table 2-3: Touchscreen Header Pinout
FPSHIFT2/DRDY/MOD
= default settings
LCD logic supply
Pin #
Function
1
2
3
4
5
6
Signal
GND
XR
YU
XY
XL
YL
To pin 38
3.3V
1-2
To pin 35
2-3
5V
out
= 45mA) and is
SDU1355-D9000
X23A-G-002-03
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