Hello, I am new on Raspberry Pi and more hardware than software experienced. My Pi is runnung as expected, as long as I use a standard HDMI monitor. But I want to run a 640x160 display with it. This display has HDMI interface and provides proper edit data to the computer. It runs with graphics cards e.g. under Windows as long as they support such resolution.
The Pi could be forced to that resolution as well. Connecting the Pi with my Dell monitor it shows exactly this resolution as defined in the config.txt.
However the problem is, that the pixel clock is about 25MHz instead of the 10MHz needed for my display. It seems to me that tje lowest pixel clock is like in VGA resolution. I guess the chip must be able to support lower frequency as well, since the TV out also needs lower pixel clock.
Does anyone know how to adjust the settings to modify the pixel clock or maybe the non visible lines (H and V front- and backporch)?
Thanks for help, Steffen