HW-SPAR3E-SK-UK-G Xilinx Inc, HW-SPAR3E-SK-UK-G Datasheet - Page 57

• Manufacturer Part Number: HW-SPAR3E-SK-UK-G
• Description: KIT STARTER SPARTAN-3E
• Manufacturer: Xilinx Inc

Specifications of HW-SPAR3E-SK-UK-G

• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Development Tool Type: Hardware / Software - Starter Kit
• Mcu Supported Families: Spartan-3E
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: HW-SPAR3E-SK-US-UK-G; HW-SPAR3E-SK-US-UK-G

Spartan-3E FPGA Starter Kit Board User Guide
UG230 (v1.2) January 20, 2011
time
HS
Current
through the
horizontal
deflection
coil
R
"front porch"
The display resolution defines the size of the beams, the frequency at which the beam
traces across the display, and the frequency at which the electron beam is modulated.
Modern VGA displays support multiple display resolutions, and the VGA controller
dictates the resolution by producing timing signals to control the raster patterns. The
controller produces TTL-level synchronizing pulses that set the frequency at which current
flows through the deflection coils, and it ensures that pixel or video data is applied to the
electron guns at the correct time.
Video data typically comes from a video refresh memory with one or more bytes assigned
to each pixel location. The Spartan-3E FPGA Starter Kit board uses three bits per pixel,
producing one of the eight possible colors shown in
the video data buffer as the beams move across the display. The controller then retrieves
and applies video data to the display at precisely the time the electron beam is moving
across a given pixel.
pixel 0,0
pixel 479,0
Stable current ramp: Information is
displayed during this time
Figure 6-2: CRT Display Timing Example
640 pixels are displayed each
time the beam traverses the screen
Horizontal display time
VGA Display
Horizontal sync signal
sets the retrace frequency
www.xilinx.com
Total horizontal time
pixel 479,639
Signal Timing for a 60 Hz, 640x480 VGA Display
pixel 0,639
Table
6-1. The controller indexes into
retrace time
"back porch"
"front porch"
Retrace: No
information
is displayed
during
this time
UG230_c6_02_021706
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