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VGA DE Mode — Parallax Forums

VGA DE Mode

yousefyousef Posts: 21
edited 2012-08-15 03:56 in Propeller 1
Hello,
What is the difference between the VGA SYNC mode and the Data Enable mode?
all of the objects i'v seen run on the SYNC mode. can the propeller run on the DE mode? is there any object for that?

Comments

  • TubularTubular Posts: 4,706
    edited 2012-08-14 14:09
    Hi Yousef

    The DE mode is generally for small TTL LCD displays - Rayman is the local expert and has drivers for these kind of displays.

    As I understand it the difference is mainly to do with the 'porches' of the signal - I think DE is only active when there are actual pixels being clocked onto the display. Whereas SYNC mode has some significant "idle time" (porches) before & after the line of active video. That's my understanding anyway.

    What do you want to connect to?
  • yousefyousef Posts: 21
    edited 2012-08-14 18:04
    i have a 5' LCD display that only runs on the DE mode and i'm trying to use it
  • TubularTubular Posts: 4,706
    edited 2012-08-14 20:07
    What resolution? Got a link to the datasheet for your display?
  • SRLMSRLM Posts: 5,045
    edited 2012-08-14 20:32
    yousef wrote: »
    i have a 5' LCD display that only runs on the DE mode and i'm trying to use it

    Is that a 5 foot display?!?
  • yousefyousef Posts: 21
    edited 2012-08-15 03:05
    loool actually it is 5" ;my mistake :lol:
    this is the data sheet http://www.distarltd.com/TFT/1/AT050TN33(TP).pdf

    i    t's a 24-bit 480
  • TubularTubular Posts: 4,706
    edited 2012-08-15 03:44
    Ok. Looks very similar to a "PSP" (Sony Playstation Portable) display, only slightly larger.

    I would definitely start with Rayman's 4.3" driver, I think it may well work.
  • yousefyousef Posts: 21
    edited 2012-08-15 03:56
    I will check it out, Thanks :smile:
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