The IF can only drive grayscale displays. No color types, no plasmas. Such displays really have the same electrical interface, with only some various pinouts. The main signals and clocks are:

frame, line and data clock	S, CP1, CP2
8 bit data	LD0...3, UD0...3
power lines	GND, +5V, -23V

Some EPSON panels have an additional M- or FRAME signal. This has to alternate with each S clock to drive the panel with the needed AC clock inside. Other panels are generating this clock internally.

Data lines are always 8 bit wide and have 4 Bit for the upper and 4 Bit for the lower half of the panel. This is not to make interfacing LCDs much easier, really.

The negative voltage supply allows the contrast adjustment from around -20 to -23 volts and takes only some mA, up to 20mA as I know. Some SHARP LCDs own a DISP ON signal, short it to +5V.

Some datasheets of displays I have tested successfully:

EPSON LCM 5644	epson.zip	167k
EPSON ECM 0557	ecm0557.gif	21k
SHARP LM64P803	sharp.zip	623k
SHARP LM641541	lm641541.gif	82k

Note: EPSON LCM5644 can be also HITACHI brand. A SHARP LM64P804 can be similar to P803 and P805.

last updated: 07/01, Kai Fischer, ZX-TEAM

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