Appendix A Epson Pc Card Extender; Features; General; Power - Epson S5U13700B00C User Manual

Appendix A Epson PC Card Extender

A.1 Features
A.2 General
Note
A.3 Power
S5U13700B00C Rev 1.0 Evaluation Board
Rev. 1.1
This section describes the setup and operation of the PC Card Extender Board Rev 1.0. This
board was designed as an evaluation interface for connecting Epson S1D137xx Mobile
Graphics Engine Evaluation Boards to the PC Card Bus.
The PC Card Extender Board Rev 1.0 includes the following features.
• Header Signals for connecting Epson S1D137xx Mobile Graphics Engine Evaluation
Boards
• Epson Identification EEPROM
• Current limiting, resettable fuse
• LED power indicators
• Voltage Level shifting to 3.3V
The PC Card Extender Board is designed to be connected to a laptop supporting a PC Card
Type II or Type III slot. The extender board includes an EEPROM containing the identifi-
cation to specify it as an EPSON LCD controller. The software driver supplied by Epson
will recognize this PC Card as an Epson LCD Controller.
The power supplies from the PC Card host are passed to the evaluation board headers. A
resettable PolySwitch fuse (750mA) is placed on Vcc to protect the PC Card bus from
excessive current consumption. If necessary, the evaluation board can be connected to an
external power supply.
Permanent damage to the host is possible if signals are shorted on the connector.
Care must be taken in attaching the modules.
The performance of the Mobile Graphics Engine in this environment is directly propor-
tional to the PC Card bus speeds. The maximum data bus transfer speed is 10MHz. The
maximum transfer rate is 20M bytes/sec in 16-bit mode and 10M Bytes/sec in 8-bit mode.
Note that the PC Card bus itself is 100% asynchronous and has no clock signals.
The PC Card Extender Board requires 5V to be supplied / supported from the PC Card Slot.
The extender board will not operate in a 3.3V only PC Card slot.
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