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RGB to parallel Interface

Hemanth Challa
Prodigy 60 points


Hello,

    I am New to TI community,  we are working on Ti Sitara Am335x Stater Kit (http://processors.wiki.ti.com/index.php/AM335x_Starter_Kit)  it is having 24 bit RGB Interface But we have LCD with 8 Bit Parallel Interface  can i Drive my 8 bit parallel LCD with On-chip LCD Controller. 

  • 0
    TI__Guru 64610 points

    I would suggest you review the AM3358 Technical Reference Manual, specifically Chapter 13 which describes the LCD controller.  See if there is a mode of operation that aligns with the requirements of the LCD display you intend to use.

  • 0 in reply to BrandonAzbell
    Prodigy 60 points

    Hi BrandonAzbell,

    I have referred Technical reference manual. In page no 1107, Micro Interface graphic display is mentioned, in which data pins are 16 [0:15] for processor but our LCD have 8 data pins only [0:7].So how to connect these LCD 8 data pins [0:7] to controller 16 data pins [0:15].

    Are there any reference circuits available.

  • 0 in reply to Hemanth Challa
    TI__Guru 64610 points

    What is the interface of your display?  Do you have any details regarding that side, other than it is 8-bits of data?  What do the control signals look like and the description of their behavior?

    These are important aspects to understand in order to determine if the LCD controller has a mode of operation which supports this display.

    You mention the Micro Interface Graphic Display mode in Table 13-6 of the Technical Reference Manual.  Is the display you are using one that supports the LIDD mode?

  • 0 in reply to BrandonAzbell
    Prodigy 60 points

    Dear BrandonAzbell,

    Thanks for Reply 

    Here is my LCD Display Control Signal.

    Signals

    Description

    WR/RS

    Write enable in MCU parallel interface.

    D0/SDA

    Used as MCU parallel interface data bus.

    CS

    Chip select signal, Low enable

    RESET

    Reset signal

    RS/SCL

    Display data/command selection pin in MCU interface.

    D0-D7

    For Data Line

    And the Remaining Pins in LCD are Ground and Vcc  Series with Some Passive components.So

    1)Can i use Micro Interface Graphic Display (8080 Family) Then what is best Way of connecting with Sitara AM335X to LCD?

    2) If My LCD will Not Support Above( Micro Interface Graphic Display (8080 Family) ) what is alternative Connection ?

    If any Of other cases I can share my LCD Datasheet with You .


    I look forward for your reply.


     Regards 

    Hemanth Kumar 



    .

  • 0 in reply to Hemanth Challa
    TI__Guru 64610 points

    You should take a look at the following E2E thread.  It discusses another processor with similar IP on the LCD controller as the AM335x.

    http://e2e.ti.com/support/dsp/omap_applications_processors/f/42/p/61521/220570.aspx#220570

    To answer your question, yes, you should be able to support 8-bit data width to your LCD, but the LCD controller will always act as if it is a 16-bit interface.  You would need to connect the lower 8-bits from the AM335x.