• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 97 subscribers
  • Views 299 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

two "RGB based" video outputs

ran cohen56951
Prodigy 110 points
Other Parts Discussed in Thread: OMAP3530, THS8135

Hi,

This is my first attempt with an OMAP3530 and i am trying to make a board with two "RGB based" video outputs (GVIF and RGB)

for the GVIF i am using CXB1455R controller

and for the RGB i don't know yet (maby you have something to suggest?) 

thing is there is only one RGB module on the OMAP3530, so my question is if i can connect both of the video controllers in parallel, if so are there any limitations or suggestion in getting better results?

Thanks in Advanced and 

Best Regards,

Ran

  • 0
    TI__Mastermind 43875 points

    Ran,

    The CXB1455R requires the video data to be continuously streamed to the controller, which means you need to use the OMAP display sub system in raster mode.

    OMAP3 only supports a single raster stream, so if you want to drive 2 raster displays then they must both be of the exact same timings and resolutions.

    The type of controller you are using depends entirely on the display you want to drive. For example if you want to drive a large format LVDS LCD then you need to use a LVDS transmitter, if you are connecting to a small format parallel CMOS LCD then no additional controller is needed. If you want to drive a HDMI display then you will need a HDMI/DVI transmitter.

    Please have a look at the following wiki page for more information...

    http://processors.wiki.ti.com/index.php/Display_Subsystem

    BR,

    Steve

  • 0 in reply to Steve Clynes
    Prodigy 110 points

    Thx Steve for your replay!

    i have no problem with same resolution, although i need two video outputs only one will be connected at a time, does that means i can connect in parallel?

    Also the two video outputs are GVIF and ANALOG-RGB

     

    Best Regards,

    Ran.

  • 0 in reply to ran cohen56951
    TI__Mastermind 43875 points

    Ran,

    If the resolutions and timings are the same then you can simply connect the two physical interface devices in parallel and both could be active at the same time (obviously displaying the same image data).

    If you are only ever going to want one or the other active at one time, then you can still connect the physical interface devices in parallel, but you have the additional advantage that you can change the resolution and timing between the two formats since you will be disabling the alternate output.

    For your analog output I suggest looking at the TI part THS8135 family.

     

    BR,

    Steve