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[SOLVED] How to program LCD-Display

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Dominik Braun

lcd program

I have an LCD-Display 4*20.
With one HD44105 and two HD44102 Controllers.
I can't find a Datasheet for these controllers.
Does anybody now how to programm them, i don't understand the function of the two CS Pins.
so far

how to program lcd

Sounds like a Hitachi display. They all have common pinouts, Try Hitachi web site for data on lcd displays.

program lcd

Hitachi LCD pin outs:
1 Vss
2 Vdd
3 Vo
4 RS
5 R/W
6 E
7 D0
8 D1
9 D2
10 D3
11 D4
12 D5
13 D6
14 D7

Data can be 8 bits or 4 bits
use D4-D7 for 4 bits
When 4 bits hi nibble, lo nibble order.
Protocol can be found in Hitachi lcd catalogue or on their web site.

lcd display program

take a look at epemag

How to use Intelligent LCDs
A reprint of our mini series - How to use Intelligent Liquid Crystal Displays, by Julyan Ilett. (February, March 1997 EPE). Provides practical, down to earth advice about liquid crystal display modules.

lcd programing

Those chips are used allmost everyone. Locate OEM LCD manufacturer webpage and confirm that they use those chips and download datasheets.
HD44105 is controller and HD44102 chips are drivers for LCD dots

how to program a lcd display

Hi dear sir
Take a look at this :
You can find an example program which has writen for 8051 microcontroller.
have a nice time
R110 :wink:

programming lcd display

Look here:
**broken link removed**

This info is quite old but helped me often ...


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