HW-SPAR3E-SK-US-G Xilinx Inc, HW-SPAR3E-SK-US-G Datasheet - Page 56
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HW-SPAR3E-SK-US-G
Manufacturer Part Number
HW-SPAR3E-SK-US-G
Description
KIT STARTER SPARTAN-3E
Manufacturer
Xilinx Inc
Specifications of HW-SPAR3E-SK-US-G
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
122-1507
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Chapter 6: VGA Display Port
Signal Timing for a 60 Hz, 640x480 VGA Display
56
Table 6-1: 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 (see
Resources,” page
CRT-based VGA displays use amplitude-modulated, moving electron beams (or cathode
rays) to display information on a phosphor-coated screen. LCDs use an array of switches
that can impose a voltage across a small amount of liquid crystal, thereby changing light
permittivity through the crystal on a pixel-by-pixel basis. Although the following
description is limited to CRT displays, LCDs have evolved to use the same signal timings
as CRT displays. Consequently, the following discussion pertains to both CRTs and LCDs.
Within a CRT display, current waveforms pass through the coils to produce magnetic fields
that deflect electron beams to transverse the display surface in a raster pattern, horizontally
from left to right and vertically from top to bottom. As shown in
only displayed when the beam is moving in the forward direction—left to right and top to
bottom—and not during the time the beam returns back to the left or top edge of the
display. Much of the potential display time is therefore lost in blanking periods when the
beam is reset and stabilized to begin a new horizontal or vertical display pass.
VGA_RED
0
0
0
0
1
1
1
1
59).
VGA_GREEN
www.xilinx.com
0
0
1
1
0
0
1
1
Spartan-3E FPGA Starter Kit Board User Guide
VGA_BLUE
0
1
0
1
0
1
0
1
UG230 (v1.2) January 20, 2011
Figure
Resulting Color
6-2, information is
Magenta
Yellow
Green
White
Black
Cyan
Blue
Red
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