Most of the DaVinci I/O are 1.8V, the LCD interface is no exception (?).
You need to chose a display that can operate with these levels or add
level shifters.
regards,
matthias
Cochrane, Euan wrote:
> Well, surprise surprise it didn't work! everything looks fine on the scope
> but it seems that the signal level is too low to be picked up properly by our
> frame grabber. Hopefully this will be the last time I need to ask for help.
> Is there any way to increase the output level of the signals on DC5?
> currently they have an amplitude of only ~1.7v. I looked through the
> registers for the VPBE and the closest I could find to what I'm looking for
> was YCOLVL (Yout and Cout Level), originally it was set to 0x00 so I tried
> setting it to 0xFF (it's maximum value for both Yout and Cout) but there was
> no change in the output. does anyone know if/how I can increase the output
> level of DC5? I am outputting 24bit RGB along with the pixel clock, hsync,
> vsync and lcd_oe all of which have an output level of ~1.7v.
> Thanks,
> Euan
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--
* Matthias Welwarsky
Project Manager Software
Germany
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