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Epson Research and Development

 

Vancouver Design Center

 

 

6.10 Power Save Modes

The S1D13504F00A supports one hardware and one software suspend Power Save Mode.

The hardware suspend mode is not supported by the S5U13504B00C.

The software suspend mode is controlled by the utility 13504PWR Software Suspend Power

Sequencing.

6.11 Core VDD Power Supply

An independent fixed 3.3V power supply for Core VDD is provided. A National LP2960AIN-3.3 voltage regulator is used for the power supply and is capable of supplying 500mA @ 3.3V.

6.12 IO VDD Power Supply

The IO VDD voltage is selectable between 3.3V and 5.0V through jumper JP2. For the 5.0V host bus interface, select IO VDD at 5.0V, and for the 3.3V host bus interface, select IO VDD at 3.3V.

Refer to Table 2-3 “Jumper Settings,” on page 8.

6.13 Adjustable LCD Panel Negative Power Supply

Most monochrome passive LCD panels require a negative power supply to provide between -18V and -23V (Iout=45mA). For ease of implementation, such a power supply has been provided as an integral part of this design. The signal VLCD can be adjusted by R37 to supply an output voltage from -14V to -23V and is enabled/disabled by the S1D13504 control signal LCDPWR.

Determine the panel’s specific power requirements and set the potentiometer accordingly before connecting the panel.

6.14 Adjustable LCD Panel Positive Power Supply

Most passive LCD passive color panels and most single monochrome 640x480 passive LCD panels require a positive power supply to supply between +23V and +40V (Iout=45mA). For ease of imple- mentation, such a power supply has been provided as an integral part of this design. The signal VDDH can be adjusted by R31 to provide an output voltage from +23V to +40V and is enabled/disabled by the S1D13504 control signal LCDPWR.

Determine the panel’s specific power requirements and set the potentiometer accordingly before connecting the panel.

S1D13504

S5U13504B00C Rev.1.0 ISA Bus Evaluation Board User Manual

X19A-G-004-06

Issue Date: 01/02/02

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Epson S1D13504 Power Save Modes, Core VDD Power Supply, IO VDD Power Supply, Adjustable LCD Panel Negative Power Supply