Chapter 6: Vga Display Port - Xilinx Spartan-3A User Manual

R
VGA Display Port
The Spartan-3A/3AN Starter Kit board includes a VGA display port via a standard high-
density HD-DB15 female connector. Connect this port directly to most PC monitors or flat-
panel LCDs using a standard monitor cable. As shown in
the left-most connector along the top of the board.
FPGA
VGA_R<3>
(C8)
VGA_R<2>
8
(B )
VGA_R<1>
(B3)
VGA_R<0>
(A3)
VGA_G<3>
(D6)
VGA_G<2>
(C6)
VGA_G<1>
(D5)
VGA_G<0>
(C5)
VGA_B<3>
(C9)
VGA_B<2>
(B9)
VGA_B<1>
(D7)
VGA_B<0>
(C7)
VGA_VSYNC
(B11)
SYNC
VGA_HSYNC
(C11)
The FPGA directly drives the five VGA signals via resistors. Each red, green, and blue
signal has four outputs from the FPGA that feed a resistor-divider tree. This approach
Spartan-3A/3AN Starter Kit Board User Guide
UG334 (v1.0) May 28, 2007
510 Ω
1 kΩ
2 kΩ
4 kΩ
510 Ω
1 kΩ
2 kΩ
4 kΩ
510 Ω
1 kΩ
2 kΩ
4 kΩ
Figure 6-1: VGA Connections from the Starter Kit Board
www.xilinx.com
Figure
Red
Green
Blue
5 4
9
10
15 14
82.5 Ω
Vertical
82.5 Ω
Horizontal
Chapter 6
6-1, the VGA connector is
3 2 1
8 7 6
12 11
13
HD-DB15 VGA Connector
(
front view)
( not VGA cable)
UG334_c6_01_052407
57