Ian:

You basically leave D0 - D3 unconnected on the display. Setup up=
 RS and R/W as usual, then clock the high nibble onto D4-D7, then=
 clock the low nibble onto D4-D7.

Take a look at the HD44780 data sheet for details. For some=
 reason this data sheet seems to be impossible to find on=
 Hitachi's sites. Here is a copy on our server you can download:

http://www.crystalfontz.com/backlight/eHD44780U.pdf

| Brent A. Crosby
| Crystalfontz America, Incorporated
| 15611 East Washington Road
| Valleyford, WA 99036-9747
| brent@crystalfontz.com http://www.crystalfontz.com
| voice (509) 291-3514 fax (509) 291-3345 US toll-free (888)=
 206-9720

--- Original Message ---
>From: "Ian Munger" <eqnox@MARTIN.WARGRENDEL.NET>
>To: =A0<PICLIST@MITVMA.MIT.EDU>
>Sent: Sun, 9 Dec 2001 23:06:28 -0500
>Subject: [EE]:Powertip PC2004-a LCD
>
>I'm looking to interface the powertip PC2004-A with a PIC. There=
 seems to
>be 8 datalines, but I've also seen an interface with 4 lines.=
 Has anyone
>worked with this display before and has a datasheet or=
 guidelines. The
>website www.actron.de is little help.
>
>-=3Dian

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