Technical Description
S5U13A05B00C Rev 1.0 Evaluation Board
Seiko Epson Corporation
19
Rev. 1.1
6.5 Adjustable LCD Panel Positive Power Supply
Most color passive LCD panels and most single monochrome 640x480 passive LCD panels
require a positive power supply to provide b23V and +40V (I
out
=45mA). Such a
power supply (VDDH) has been provided on the S5U13A05B00C board. VDDH
can be
adjusted using R14 to provide an output voltage from +23V to +40V, and is
enabled/disabled using the S1D13A05 general purpose signal, GPO0 (active high).
Note
When manually adjusting the voltage, set the potentiometer according to the panel’s
specific power requirements
before connecting the panel.
6.6 Software Adjustable LCD Backlight Intensity Support Using PWM
The S1D13A05 provides Pulse Width Modulation output on PWMOUT. PWMOUT can be
used to control LCD panels which support PWM control of the backlight inverter. The
PWMOUT signal is provided on LCD Connector H1.
6.7 LCD Panel Support
The S1D13A05 directly supports:
• Single-panel, single drive passive displays.
• 4/8-bit monochrome interface.
• 4/8/16-bit color interface.
• Active Matrix TFT interface.
• 9/12/18-bit interface.
• Direct support for 18-bit Sharp HR-TFT LCD panel.
• Direct support for 18-bit Casio TFT LCD panel.
• Direct support for 18-bit TFT Type 2 LCD panel.
• Direct support for 18-bit TFT Type 3 LCD panel.
• Direct support for 18-bit TFT Type 4 (Epson ND-TFD) LCD panel.
All the necessary signals are provided on the 40-pin LCD Connector H1, 16-pin Extended
LCD Connector H2, and the 26-pin TFT Type 3 Extended LCD Connector H3. For detailed
connection information, see Section 5, “LCD Interface Pin Mapping” on page 16.
6.7.1 LCD Connector
The LCD Connector H1 provides all LCD panel signals required for Active Matrix TFT
and Passive LCD panels. These signals are buffered to either a 3.3V level or a 5.0V level
depending on the setting of JP3. See Table 3-2: “Jumper Summary” on page 9.
