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 Post subject: 128x64 LCD module
PostPosted: Sun Aug 07, 2005 14:52 
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Joined: Sun Aug 07, 2005 14:48
Posts: 4
Hello

I am a terribly newbie here. I am here to learn graphic LCD as part of my hobby. Recently I have bought the 128x64 LCD module and I have tried to use one today. I understood that a datasheet states that a typical 4.5 voltage should be applied to the LCD module. So I test it in order to see it works by applying ground and 4.5V to Vss and Vdd respecively. Unfortunately I could not see anything from the 128x64 LCD display. I use KS0108 driver.

Have I missed out anything or need to add extra components in order to make it work?

Can you please kindly advise me how to bring my 128x64 LCD module alive?

Yin-Yang


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 Post subject:
PostPosted: Sun Aug 07, 2005 15:02 
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Joined: Sun Aug 07, 2005 14:48
Posts: 4
Here is a datasheet - http://www.hebeiltd.com.cn/lcm.datasheet/ATM12864D.pdf

I don't fully understood with electronic stuff atm as I am quite new in electronic and microcontroller.

Yin-Yang


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 Post subject:
PostPosted: Sun Aug 07, 2005 16:13 
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Joined: Sun Aug 07, 2005 14:48
Posts: 4
So far I have done:

Vdd = 5V
Vss = 0V

Vee = ??

Vo = ?? (Should I connect to with a variable resistor 10k??)

DB0-DB7 - connect to uC chip's port
R/W - connect to uC chip's port
D/I - connect to uC chip's port
E - connect to uC chip's port
CS1 and CS2 - connect to uC chip's port
RES - connect to uC chip's port
A - connect 8ohm resistor
K - connect to ground

I am still not sure about Vee and Vo.

Yin Yang


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 Post subject:
PostPosted: Mon Aug 08, 2005 11:25 
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Joined: Wed Jan 05, 2005 13:57
Posts: 5
I have some problems reading the datasheet (something about chinese character). But... Vee must be the voltage needed for contrast, and must be variable between Vdd-19 and Vdd+0,3. I think you need some negative voltage supply.


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 Post subject:
PostPosted: Sun Sep 04, 2005 12:22 
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Joined: Thu Dec 09, 2004 16:01
Posts: 218
Location: NH, USA
Your -VEE is the voltage needed to drive the LCD, and the VO is your contrast adjustment. According to your data sheet, you should have about -13.5vdc (specs say between -8 to -19) for your -VEE. You would connect your potentiometer for your contrast so that one pin goes to -VEE, center pin to VO, other pin to VDD.


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 Post subject: Re:
PostPosted: Tue Feb 12, 2008 11:40 
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Joined: Tue Feb 12, 2008 11:37
Posts: 1
Hey, have you ever tried http://www.datasheetpro.com/index.php ? It is a free Datasheet search site for Electronic Components and Semiconductors, integrated circuits, diodes, triacs, and other semiconductors.
Hope you will get what you want.
Good luck!


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 Post subject: Re: 128x64 LCD module
PostPosted: Tue Jan 03, 2012 8:02 
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Joined: Fri Dec 30, 2011 15:46
Posts: 2
Hi

I have been learning to use 128x64 LCD module with AT89C51 and I have been using FastLCD for converting bmp into a table of bytes.

I have use the table in my codes and tried to compile it. I get the result - auto segment too large.

How to put all bytes in my codes in order to display picture on my 128x64 LCD module.

I don't understand it. What is the problem?


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