[Lcdproc] hd44780 goes 4-bit

Pierre Ossman drzeus-list@drzeus.cx
Sun Dec 30 18:20:02 2007


Hi again,

I've scoped the stuff now and the waveform looks nice and clean. The delays are also well within the specified limits. The card also already has a pull-up, so now point in adding another one.

The module is a Samsung 16T202DA1 with a HD44780 compatible NEC D16314AGJ-011 chip on it. I don't suppose it has any know issues? I couldn't find a data sheet for the chip to check for any special requirements.

I'll see if I can get the module replaced, in case it's simply broken in some well hidden place.

Rgds
-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  PulseAudio, core developer          http://pulseaudio.org
  rdesktop, core developer          http://www.rdesktop.org