From a7bcc05d03f306fb23ea22c5cb779d5db701fdba Mon Sep 17 00:00:00 2001
From: marschap <marschap@users.sourceforge.net>
Date: Fri, 13 May 2005 21:54:53 +0000
Subject: [PATCH] added Ekkehard Kraemer's documentation update to the winamp
 wiring scheme.

---
 docs/lcdproc-user/drivers/hd44780.docbook | 27 ++++++++++++++++++++---
 1 file changed, 24 insertions(+), 3 deletions(-)

diff --git a/docs/lcdproc-user/drivers/hd44780.docbook b/docs/lcdproc-user/drivers/hd44780.docbook
index d27f858..f0e8753 100644
--- a/docs/lcdproc-user/drivers/hd44780.docbook
+++ b/docs/lcdproc-user/drivers/hd44780.docbook
@@ -441,7 +441,7 @@ This is originally based on "lcdtext" (by Matthias Prinke).
 </row>
 <row>
 <entry>D5 (7)</entry>
-<entry>RW (5) (LCD3 - 6) (optional - pull all LCD RW low)</entry>
+<entry>RW (5) (LCD3 - 6) (optional - pull all LCD RW low (*) )</entry>
 </row>
 <row>
 <entry>D6 (8)</entry>
@@ -455,6 +455,13 @@ This is originally based on "lcdtext" (by Matthias Prinke).
 </tgroup>
 </table>
 
+<para>
+(*) on the RW line of the display: this line decides whether the display receives data from the 
+LPT port, or whether it sends data to the LPT port. If grounded, it receives. If High or connected 
+to nothing at all, it "sends" (i.e., will not work as intended). So, if you are not sure that 
+you need it otherwise, then connect it to GND. This certainly applies if you have only one display.
+</para>
+
 <para>
 If you want to connect more than two displays to the parallel port then
 wire D5 (pin 7) to the enable line (pin 6) of the third LCD. Then for
@@ -602,7 +609,7 @@ This type of connection should work with winamp.
   D6 (8)        D6 (13)
   D7 (9)        D7 (14)
   nSTRB (1)     EN (6)
-  nLF   (14)    nRW (5) (EN3 6 - LCD 3) (optional)
+  nLF   (14)    nRW (5) (EN3 6 - LCD 3) (optional (*) )
   INIT  (16)    RS (4)
   nSEL  (17)    EN2 (6 - LCD 2) (optional)
 
@@ -610,6 +617,13 @@ This type of connection should work with winamp.
 </screen>
 </figure>
 
+<para>
+(*) on the RW line of the display: this line decides whether the display receives data from the 
+LPT port, or whether it sends data to the LPT port. If grounded, it receives. If High or connected 
+to nothing at all, it "sends" (i.e., will not work as intended). So, if you are not sure that 
+you need it otherwise, then connect it to GND. This certainly applies if you have only one display.
+</para>
+
 <para>
 If you want the display to work with the Winamp plugin, wire nLF (pin 14)
 to nRW of your LCD. You can then use the plugin in bidirectional mode (wich
@@ -700,13 +714,20 @@ The LCD connections are:
   D7 (9)        D7 (14)
   nSEL  (17)    -
   nSTRB (1)     RS (4)
-  nLF   (14)    RW (5) (LCD2 - 6) (optional - pull all LCD RW low)
+  nLF   (14)    RW (5) (LCD2 - 6) (optional - pull all LCD RW low (*))
   INIT  (16)    EN (6)
 
 ]]>
 </screen>
 </figure>
 
+<para>
+(*) on the RW line of the display: this line decides whether the display receives data from the 
+LPT port, or whether it sends data to the LPT port. If grounded, it receives. If High or connected 
+to nothing at all, it "sends" (i.e., will not work as intended). So, if you are not sure that 
+you need it otherwise, then connect it to GND. This certainly applies if you have only one display.
+</para>
+
 <para>
 See the lcdtime tar-ball (above) for full details of the bargraph
 connections.