Technical Description
S5U13A04B00C Rev 1.0 Evaluation Board
Seiko Epson Corporation
19
Rev. 3.1
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 S5U13A04B00C board. VDDH
can be
adjusted using R22 to provide an output voltage from +23V to +40V, and is
enabled/disabled using the S1D13A04 general purpose signal, GPIO0 (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 S1D13A04 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 the LCD connector, H1.
6.7 LCD Panel Support
The S1D13A04 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 or compatible interface.
All the necessary signals are provided on the 40-pin LCD connector H1 and the 16-pin LCD
connector H2. For connection information, refer to Table 5-1: “LCD Signal Connector
(H1)” on page 15 and Table 5-2: “Extended LCD Signal Connector (H2)” on page 17.
6.7.1 Direct LCD Connector
The direct 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.
