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Last Post 14 Jul 2007 12:48 AM by  sygi@canbus.pl
LCD Connections
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Lon
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Posts:3


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01 May 2006 01:26 PM
    Ok, I am finally getting to interface our LCD to the 5329 fire engine. But as I am looking at the schematics, the MCF5329's user manual and Logic's application Note 161 "Interfacing LCD's to Logic's SDK Board" I am concerned that a pin is mapped incorrectly.

    On Page 10 of 1001664_rev4_fire_sch.pdf it shows LCD_MDISP connected to the Contrast pin (D10) and LCD_VDDEN to the ACE/OE (B9) pin. As I follow these signals back to the LCD interface header on the SDK board it would appear that I need to use LCD_VDDEN as my lcd DRDY or /OE signal instead of LCD_MDISP which is listed int he app. note.

    Has any one else noticed this or had a problem with the LCD header while trying to connect an 18 bit TFT display? (lg phillips LB121S1-A2)

    Thanks
    Anonymous
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    01 May 2006 04:53 PM
    Here is a link to the PCN that addresses this issue:

    http://www.logicpd.com/do...17/1005272_Rev_A.pdf

    Thanks,
    Lon
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    02 May 2006 06:42 AM
    I have seen that pcn. I am wondering about LCD_MDISP, it you follow it through the schematics you will find it connected to the Contrast pin and LCD_VDDEN (VEE enable signal) is connected to the ACE/OE pin. These connections don't match up with the app note 161. I guess I am just wanting verification before I lay out an adapter board for my LCD.
    kurtl@logicpd.com
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    02 May 2006 01:47 PM
    Lon,
    Thanks for the heads up. A few of us took a look at it and agree that it is an issue. I am not sure what the corrective action will be yet, however, to keep your development progressing, I would put 2 zero ohm jumpers on your LCD adapter board so you can swap between LCD connector pins 35 and 37.

    It looks like ACD/OE should be tied to LCD_MDISP, and CONTRAST or another GPIO should be tied to LCD_VDDEN on the module.

    Also note that some displays do not require the MDISP signal when setup correctly. I know on LPD's 6.4" and 12.1" display kits the ENAB/MDISP signal can be held low if all the other settings are setup correctly.

    -Kurt
    Lon
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    03 May 2006 06:33 AM
    Thanks,

    I have already added the jumpers to my adapter
    It would be nice to not need LCD_MDISP, but I am pretty sure I will need the ACD/OE signal for our panels.

    Is it possible to be informed when you know what your solution will be? We plan on using this engine in our final project and as soon as I get the LCD going I will begin laying out our main board.
    kurtl@logicpd.com
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    03 May 2006 08:29 AM
    A formal PCN will be published on the MCF5329 portion of our website. If you are signed up for auto-email updates on the MCF5329 you should get a notification when the PCN is published.
    -Kurt
    buckeyeman@gmail.com
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    23 Jun 2007 02:52 PM
    OK
    sygi@canbus.pl
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    14 Jul 2007 12:48 AM
    I have the same problem. Which pin of the M5329EVB LCD connector shall I connect to my LCD data enable control pin (DEN). ??
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