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Electronics Seiko LCD

Discussion in 'Modding' started by papeniglio, 6 Dec 2002.

  1. papeniglio

    papeniglio Minimodder

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    Hy all,
    I'm a newbie in this forum (and in modding too), even if I read daily the news on the BiT-Tech site and have printed all the pages in the Articles section... :D

    I need help with an LCD display: it's taken from an ERICSSON digital telephone (it worked when I got it) and it's a 20x2 display. It's labelled SII C456001 Rev.1; I found it's a Seiko product, but there is no documentation on the web site.
    Moreover, it has a strange pinout: it has only 12 pins.... As it has no backlight, I supposed 14 pins could be enough; but 12 :confused: ....

    Anyone has any idea or hint for solving this problem????

    Thanks a lot,

    GeeK!
     
  2. linear

    linear Minimodder

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    Welcome to the boards.

    I haven't run into a 12-pin parallel LCD interface. The standard HC44780 controller chip needs 14 pins (as you seem to have already figured out ;)). Two of these (1 and 2) are power for the unit--so if there's an obvuios other power connector, maybe you have an answer there.

    Friendly Google has turned up a post from the eio mailing list that seems to imply that you do have a HD44780 device:
    http://www.eio.com/public/lcd/2060.html

    If you can verify that you do have a HD44780 chip on it, we have a few connection guides linked from our LCD FAQ page as well as links to software that will run on a parallel unit.

    Happy modding!
     
  3. ndtinker

    ndtinker Car Washoholic

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    I've got info on a 10-pin HD44780 setup but not a 12 pin - my guess is that it's a 10 pin with a backlight but I'm not certain.

    Anyway, here's the pinouts: (hopefully it will stay formatted)

    Pin | Name | Description |
    -----|---------------|--------------------------------|--
    1 | Ground | Ground (duh) |
    2 | Vcc | +5 |
    3 | Vee |Contrast control (10k pot) |
    4 | RS |Register Select (// Wire 16)|
    5 | R/W | Read/Write (Ground) |
    6 | E | Enable (// Wire 1) |
    7 | DB4 | Databus Bit 4 (// Wire 6) |
    8 | DB 5 | Databus Bit 5 (// Wire 7) |
    9 | DB 6 | Databus Bit 5 (// Wire 8) |
    10 | DB 7 | Databus Bit 5 (// Wire 9) |

    I hope that helps. Like I said, most likely wires 11 & 12 are the backlight +5 power.
     
  4. Cheese

    Cheese Doc

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    Yeah that's the one, it's just the same as the 16pin layout but with half the data channels...

    You'll have troubles making any decent software work with a 4-bit display :(

    Rob.
     
  5. papeniglio

    papeniglio Minimodder

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    Thanks ndtinker,
    I'll check your pinout, but I think this is a particular display: as I said, it was in an ERICSSON telephone and surely it has no backlight (I've seen it working). Moreover, it was not possible to adjust the contrast from the phone, so I guess the pinout could be different; this is my guess:

    PIN| FUNCTION
    ----|--------------------------
    1 | GND
    2 | +5V
    3 | Register Select
    4 | Enable
    5 | Data line 0
    6 | Data line 1
    7 | Data line 2
    8 | Data line 3
    9 | Data line 4
    10 | Data line 5
    11 | Data line 6
    12 | Data line 7

    I guessed that the VLC and the R/W pins could be useless in the telephone....
    Anyway, I've just found the datasheet of the controller: it's a SAMSUNG KS0066F00 chip, pin-to-pin compatible with HD44780. This evening I'll test some pins and we'll see.....
    Maybe I can take a pic of the module.....

    Thank you all,
    GeeK!
     
    Last edited: 9 Dec 2002
  6. Cheese

    Cheese Doc

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    If it doesn't have a backlight I'd say the extra two pins are most likely to be spare... could be wrong though we'll see :)

    Rob.
     
  7. Deymos

    Deymos What's a Dremel?

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    I CAN'T BELIEVE IT!!!!!!
    :eeek: :eeek: :eeek:

    An Italian Modder! Like me!

    Hope u'll success in this bro, I found 2 cell phone lcds that would be great mounted in a bay to show different stats (plus, they'r backlit) but had no luck at all in finding the specs..:waah:

    Good luck m8!:hehe:

    :brrr:
     
  8. jethro

    jethro Modthusiast

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    cell phone lcds eh? /me starts eying have working ericson t68i.

    i could use that things for sure
     
  9. Deymos

    Deymos What's a Dremel?

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    /me hopes optrex technical support answer soon.
     
  10. papeniglio

    papeniglio Minimodder

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    Hi Deymos,
    nice to see another italian in this forum....
    The display is NOT from a cell-phone; it's taken from a digital table phone (ERICSSON Consono 3212 I think).

    Anyway, where are you from?

    GeeK!
     
  11. Deymos

    Deymos What's a Dremel?

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    Sorry, my last 2 neurons
    :rock: :hip: <<-----------------+++ Look at my last 2 neurons

    had some trouble understanding what I've read...too much spraypaint..:hehe:

    Anyway, i'm from Palermo... and believe me it's cold :brrr: out there
     
  12. papeniglio

    papeniglio Minimodder

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    I'm from Brescia, and it's really cold here too!!!! :brrr:

    Hope we have a snowy Xmas!

    GeeK!
     
  13. papeniglio

    papeniglio Minimodder

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    Hey ndtinker, I've checked the pinout and you're right: it is a 10-pin unit with pins 11 and 12 not connected (no backlight).

    Now I have a question for you: can convert it into a full 8-bit display by simply soldering the missing data lines directly on the pins of the controller?

    Thanks again,
    GeeK!
     
  14. Cheese

    Cheese Doc

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    Well my first reaction was no, because how does the controller know its getting a byte instead of a nibble? say you send 00001111, how does it know that wasn't a 1111 nibble with the other half of the byte on the way next?

    This said the standard HD44780 controller can take a 4bit input without any hardware changes (I'm pretty sure), so maybe you can?

    Rob.
     
  15. Digitalblueshift

    Digitalblueshift What's a Dremel?

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    byte, nibble, lol :lol:
     
  16. papeniglio

    papeniglio Minimodder

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    Hey, remember that the HD44780 can handle both 4 bit and 8 bit I/F with MPU; the only way to tell it how to read data from MPU is setting the DB4 in the Function Set instruction during display setup. So if I solder all the data lines to the controller it should be OK (I repeat should)....

    Goin' to try this week-end...

    GeeK!
     
  17. ndtinker

    ndtinker Car Washoholic

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    It's supposed to work but I never really got the chance to try it - I had just bought a 2x40 LCD, finished wiring it, then BAM!, the little chip in the back literally blew out. I'm not sure what happened. I guess I accidentally plugged it into the 12v line instead of the 5v... I guess I need to be more careful. :(
     
  18. papeniglio

    papeniglio Minimodder

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    Whaat? A 2x40!?!?!? It's really a huge one, isn't it?
    I had no time to test my LCD: my son was ill and I had to help my wife..... Think I have to postpone the expreriment after Xmas time.. I'm going to take a short vacation next week, so let's see next year!!!!!

    :wallbash: :wallbash: :wallbash: :wallbash: I can't wait anymore :wallbash: :wallbash: :wallbash: :wallbash:

    GeeK!
     
  19. Lovah

    Lovah Apple and Canon fanboy

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    hmmmm


    LCD displays from a cell phone ... are usable on a PC , hmmmm

    Intresting


    so , lets say , I find a LCD display , and I have the pin outs , and its a common one

    then how do u connect it to your pc ? and how can I control it ?



    do u need a controller for it ? or can u wire it up to a parrallel port ? or com ... ??

    please more information on the subject , this is intresting
     
  20. ndtinker

    ndtinker Car Washoholic

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    The 2x40 was about an inch tall and a little over 6 inches long I think.
     

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