HW-SPAR3-SK-UNI-G Xilinx Inc, HW-SPAR3-SK-UNI-G Datasheet - Page 22

• Manufacturer Part Number: HW-SPAR3-SK-UNI-G
• Description: KIT STARTER SPARTAN-3
• Manufacturer: Xilinx Inc
• Series: Spartan-3r
• Type: FPGA Configurationr

Specifications of HW-SPAR3-SK-UNI-G

• Contents: Board, Cable, Software, Datasheets and User Manual
• For Use With/related Products: Spartan-3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 122-1521

Signal Timing for a 60Hz, 640x480 VGA Display
22
R
Table 5-1: VGA Port Connections to the Spartan-3 FPGA
Each color line has a series resistor to provide 3-bit color, with one bit each for Red, Green,
and Blue. The series resistor uses the 75Ω VGA cable termination to ensure that the color
signals remain in the VGA-specified 0V to 0.7V range. The HS and VS signals are TTL level.
Drive the R, G, and B signals High or Low to generate the eight possible colors shown in
Table
Table 5-2: 3-Bit Display Color Codes
VGA signal timing is specified, published, copyrighted, and sold by the Video Electronics
Standards Association (VESA). The following VGA system and timing information is
provided as an example of how the FPGA might drive VGA monitor in 640 by 480 mode.
For more precise information or for information on higher VGA frequencies, refer to
documents available on the VESA website or other electronics websites:
•
•
CRT-based VGA displays use amplitude-modulated, moving electron beams (or cathode
rays) to display information on a phosphor-coated screen. LCD displays use an array of
switches that can impose a voltage across a small amount of liquid crystal, thereby
changing light permitivity through the crystal on a pixel-by-pixel basis. Although the
following description is limited to CRT displays, LCD displays have evolved to use the
Red (R)
Green (G)
Blue (B)
Horizontal Sync (HS)
Vertical Sync (VS)
Red (R)
Video Electronics Standards Association
http://www.vesa.org
VGA Timing Information
http://www.epanorama.net/documents/pc/vga_timing.html
0
0
0
0
1
1
1
1
5-2.
Green (G)
Signal
0
0
1
1
0
0
1
1
www.xilinx.com
Blue (B)
0
1
0
1
0
1
0
1
Resulting Color
Magenta
Yellow
Green
White
Black
Cyan
Blue
Red
Spartan-3 FPGA Starter Kit Board User Guide
FPGA Pin
R12
T12
R11
T10
R9
UG130 (v1.2) June 20, 2008
Chapter 5: VGA Port