S1D13704 Epson Electronics America, Inc., S1D13704 Datasheet - Page 316

• Manufacturer Part Number: S1D13704
• Description: LCD Controller
• Manufacturer: Epson Electronics America, Inc.

Page 20
6.5 Adjustable LCD Panel Negative Power Supply (VLCD)
6.6 Passive/Active LCD Panel Support
6.7 Power Save Modes
S1D13704
X26A-G-014-02
For those LCD panels requiring a negative power supply between -23V and -14V (Iout =
25mA) a power supply has been provided as an integral part of this design. The VLCD
power supply can be adjusted by R21 to give an output voltage from -23V to -14V and is
enabled and disabled by the active high LCDPWR control signal of S1D13704 and inverted
externally.
Determine the panel’s specific power requirements and set the potentiometer accordingly
before connecting the panel.
The S1D13704 directly supports:
• 4/8-bit, single and dual, monochrome passive panels.
• 4/8-bit, single and dual, color passive panels.
• 9/12-bit, TFT active matrix panels.
All the necessary signals are provided on the 40-pin LCD connector J5. For connection
information, refer to Table 5-1: “LCD Signal Connector (J5)” on page 18.
The buffered LCD connector (J5) provides the same LCD panel signals as those directly
from S1D13704, but with voltage-adapting buffers selectable to 3.3V or 5.0V. Pin 32 on
this connector provides a voltage level of 3.3V or 5.0V to the LCD panel logic (see “JP4 -
LCD Panel Voltage Selection” on page 13 for information on setting the panel voltage).
The S1D13704 supports one hardware and one software power save mode. The hardware
power save mode needs to be enabled by setting REG[02h] bit1 to 1 and then can be
activated by DIP switch SW1-6. See Table 3-1: “Configuration DIP Switch Settings” on
page 10.
S5U13704B00C Rev. 2.0 Evaluation Board User Manual
Epson Research and Development
Vancouver Design Center
Issue Date: 2002/09/16