LCD Module identification problem

T

The Eighth Doctor

Guest
Hello from the Eighth Doctor
It seems I am in need of the advice of this august gathering. I have here an LCD
module that's similar to an LM018L type device. It was removed from other
equipment. The seller did not have that information.

Please go to http://www.gregg.levine.name and follow the instructions at the bottom
of the index page to take you to the one for the LCD display. I can be contacted via
the e-mail address in the signature. Or via other methods, the website will explain.
---
Gregg C Levine drwho8 atsign att dot net
 
On Thu, 23 Dec 2004 16:54:39 GMT, drwho8__NOTME__@att.net (The Eighth
Doctor) put finger to keyboard and composed:

Hello from the Eighth Doctor
It seems I am in need of the advice of this august gathering. I have here an LCD
module that's similar to an LM018L type device. It was removed from other
equipment. The seller did not have that information.

Please go to http://www.gregg.levine.name and follow the instructions at the bottom
of the index page to take you to the one for the LCD display. I can be contacted via
the e-mail address in the signature. Or via other methods, the website will explain.
---
Gregg C Levine drwho8 atsign att dot net
Click to expand...
What are the part numbers of the two ICs?

You may be able to confirm the module's pinout from the datasheet of
the CPU (Hitachi HD44780 ?).
http://www.eio.com/hd44780.pdf

This is the datasheet for an LCD module with a similar pinout and
which is based around the HD44780 CPU.
http://members.optusnet.com.au/~fzabkar/ZA8957A.pdf

This is a similar LCD but with the power pins reversed:
http://www1.jaycar.com.au/products_uploaded/QP-5515.pdf


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
In article <9n6ms0h90iv97v924br8rckokgisrbp484@4ax.com>,
fzabkar@optussnet.com.au says...
On Thu, 23 Dec 2004 16:54:39 GMT, drwho8__NOTME__@att.net (The Eighth
Doctor) put finger to keyboard and composed:

Hello from the Eighth Doctor
It seems I am in need of the advice of this august gathering. I have here an LCD
module that's similar to an LM018L type device. It was removed from other
equipment. The seller did not have that information.

Please go to http://www.gregg.levine.name and follow the instructions at the
bottom
of the index page to take you to the one for the LCD display. I can be contacted
via
the e-mail address in the signature. Or via other methods, the website will explain.
---
Gregg C Levine drwho8 atsign att dot net

What are the part numbers of the two ICs?

You may be able to confirm the module's pinout from the datasheet of
the CPU (Hitachi HD44780 ?).
http://www.eio.com/hd44780.pdf

This is the datasheet for an LCD module with a similar pinout and
which is based around the HD44780 CPU.
http://members.optusnet.com.au/~fzabkar/ZA8957A.pdf

This is a similar LCD but with the power pins reversed:
http://www1.jaycar.com.au/products_uploaded/QP-5515.pdf


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
Click to expand...
Hello from the Eighth Doctor
I see your point. The one under the label is the controller, HD44780, and the other
presumably the CG chip although I might be wrong is a HD44100. The docs you
cited do indeed bear out your statements. However, I'm still going to wait and see
what the rest think.
----
Gregg C Levine drwho8 atsign att dot net
"This signature is really invalid."
 
On Thu, 23 Dec 2004 21:00:05 GMT, drwho8__NOTME__@att.net (The Eighth
Doctor) put finger to keyboard and composed:

In article <9n6ms0h90iv97v924br8rckokgisrbp484@4ax.com>,
fzabkar@optussnet.com.au says...

On Thu, 23 Dec 2004 16:54:39 GMT, drwho8__NOTME__@att.net (The Eighth
Doctor) put finger to keyboard and composed:

Hello from the Eighth Doctor
It seems I am in need of the advice of this august gathering. I have here an LCD
module that's similar to an LM018L type device. It was removed from other
equipment. The seller did not have that information.

Please go to http://www.gregg.levine.name and follow the instructions at the
bottom
of the index page to take you to the one for the LCD display. I can be contacted
via
the e-mail address in the signature. Or via other methods, the website will explain.
---
Gregg C Levine drwho8 atsign att dot net

What are the part numbers of the two ICs?

You may be able to confirm the module's pinout from the datasheet of
the CPU (Hitachi HD44780 ?).
http://www.eio.com/hd44780.pdf

This is the datasheet for an LCD module with a similar pinout and
which is based around the HD44780 CPU.
http://members.optusnet.com.au/~fzabkar/ZA8957A.pdf

This is a similar LCD but with the power pins reversed:
http://www1.jaycar.com.au/products_uploaded/QP-5515.pdf


- Franc Zabkar

Hello from the Eighth Doctor
I see your point. The one under the label is the controller, HD44780, and the other
presumably the CG chip although I might be wrong is a HD44100. The docs you
cited do indeed bear out your statements. However, I'm still going to wait and see
what the rest think.
Click to expand...
As I see it, you probably have a 16 character x 2-line display. The
HD44780 is a controller and display driver with on-chip character
generator. Each character is probably constructed from a 5x8 (HxV) dot
matrix. The HD44780 drives the first 40 segments x 2 lines of the
display which means it directly controls the leftmost 8 characters of
each line (there are 5 segments per character). The HD44100 appears to
be a dual shift register and 40 segment LCD driver that controls the
rightmost 8 characters x 2 lines of the display. Its shift registers
are loaded by the HD44780. So it looks like your display consists of
the main CPU plus an "extender". In this respect it appears identical
to those above, except possibly for the CG ROM.

See the block diagram in the datasheet for the ZA8957A. Its Samsung
KS0066 controller is identical to the HD44780, and the "on-board
driver IC" could be your HD44100.

At the very least, I would perform a continuity check between the
DB0-7, RS, R/W*, and E pins of the HD44780 CPU and the interface pins
of the LCD module.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
In article <plGyd.1149696$Gx4.37319@bgtnsc04-news.ops.worldnet.att.net>,
drwho8__NOTME__@att.net says...
In article <9n6ms0h90iv97v924br8rckokgisrbp484@4ax.com>,
fzabkar@optussnet.com.au says...

On Thu, 23 Dec 2004 16:54:39 GMT, drwho8__NOTME__@att.net (The Eighth
Doctor) put finger to keyboard and composed:

Hello from the Eighth Doctor
It seems I am in need of the advice of this august gathering. I have here an LCD
module that's similar to an LM018L type device. It was removed from other
equipment. The seller did not have that information.

Please go to http://www.gregg.levine.name and follow the instructions at the
bottom
of the index page to take you to the one for the LCD display. I can be
contacted
via
the e-mail address in the signature. Or via other methods, the website will
explain.
---
Gregg C Levine drwho8 atsign att dot net

What are the part numbers of the two ICs?

You may be able to confirm the module's pinout from the datasheet of
the CPU (Hitachi HD44780 ?).
http://www.eio.com/hd44780.pdf

This is the datasheet for an LCD module with a similar pinout and
which is based around the HD44780 CPU.
http://members.optusnet.com.au/~fzabkar/ZA8957A.pdf

This is a similar LCD but with the power pins reversed:
http://www1.jaycar.com.au/products_uploaded/QP-5515.pdf


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

Hello from the Eighth Doctor
I see your point. The one under the label is the controller, HD44780, and the other
presumably the CG chip although I might be wrong is a HD44100. The docs you
cited do indeed bear out your statements. However, I'm still going to wait and see
what the rest think.
----
Gregg C Levine drwho8 atsign att dot net
"This signature is really invalid."

Hello from the Eighth Doctor
Click to expand...
Here's something completely off the wall. I have here another display. Its big
difference between the one in the pictures is how the connections were brought out.
The company used the standard single in line approach rather then the ribbon
conector approach.

However because they used the exact same pair of chips in constructing the display
it behaves exactly the same way. Something else to consider while musing about the
strangeness of LCD display devices.
----
Gregg C Levine drwho8 atsign att dot net
"This signature is really invalid."
 
On Sat, 25 Dec 2004 05:01:48 GMT, drwho8__NOTME__@att.net (The Eighth
Doctor) put finger to keyboard and composed:

In article <plGyd.1149696$Gx4.37319@bgtnsc04-news.ops.worldnet.att.net>,
drwho8__NOTME__@att.net says...

In article <9n6ms0h90iv97v924br8rckokgisrbp484@4ax.com>,
fzabkar@optussnet.com.au says...

On Thu, 23 Dec 2004 16:54:39 GMT, drwho8__NOTME__@att.net (The Eighth
Doctor) put finger to keyboard and composed:

Hello from the Eighth Doctor
It seems I am in need of the advice of this august gathering. I have here an LCD
module that's similar to an LM018L type device. It was removed from other
equipment. The seller did not have that information.

Please go to http://www.gregg.levine.name and follow the instructions at the
bottom
of the index page to take you to the one for the LCD display. I can be
contacted
via
the e-mail address in the signature. Or via other methods, the website will
explain.
---
Gregg C Levine drwho8 atsign att dot net

What are the part numbers of the two ICs?

You may be able to confirm the module's pinout from the datasheet of
the CPU (Hitachi HD44780 ?).
http://www.eio.com/hd44780.pdf

This is the datasheet for an LCD module with a similar pinout and
which is based around the HD44780 CPU.
http://members.optusnet.com.au/~fzabkar/ZA8957A.pdf

This is a similar LCD but with the power pins reversed:
http://www1.jaycar.com.au/products_uploaded/QP-5515.pdf


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

Hello from the Eighth Doctor
I see your point. The one under the label is the controller, HD44780, and the other
presumably the CG chip although I might be wrong is a HD44100. The docs you
cited do indeed bear out your statements. However, I'm still going to wait and see
what the rest think.
----
Gregg C Levine drwho8 atsign att dot net
"This signature is really invalid."

Hello from the Eighth Doctor
Here's something completely off the wall. I have here another display. Its big
difference between the one in the pictures is how the connections were brought out.
The company used the standard single in line approach rather then the ribbon
conector approach.

However because they used the exact same pair of chips in constructing the display
it behaves exactly the same way. Something else to consider while musing about the
strangeness of LCD display devices.
Click to expand...
I also have a second LCD module (http://www.eio.com/m16410a.pdf) which
has a single inline connector. It has only the one chip (HD44780) and
a 16 character x 1 line display. The connector uses the same pinout as
the 2-line examples above.

FYI, while researching LCD modules I found this great site:
http://www.eio.com/datashet.htm

It has lots of data sheets, instructions, and code examples.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
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