VGA Connector

This scheme gives 8 “colours” including Black and White. For additional colours add 3 more resistors to three more ports. This then will give more colours / shades.

With suitable timing the signals can be CCIR 625 / 576i 25 fps RGB for SCART or 640×480 p 60fps (VGA).

Figure 6-4 provides the UCF constraints for the VGA display port, including the I/O pin

assignment, the I/O standard used, the output slew rate, and the output drive current.

NET “VGA_RED” LOC = “H14″ | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;

NET “VGA_GREEN” LOC = “H15″ | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;

NET “VGA_BLUE” LOC = “G15″ | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;

NET “VGA_HSYNC” LOC = “F15″ | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;

NET “VGA_VSYNC” LOC = “F14″ | IOSTANDARD = LVTTL | DRIVE = 8 | SLEW = FAST ;