Xilinx Spartan-3A FPGA User Manual page 16

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Operating the Default Demonstration Design
The demonstration design programmed onto the Spartan-3A Starter Kit board provides
various output information, depending on what I/O or display devices are connected. The
VGA and audio ports provide the richest experience.
VGA Display
If a VGA display is connected to the board, then the Spartan-3A Starter Kit board displays
graphics similar to that shown in
Until one of the four push-buttons around the rotary knob
pressed, the display automatically rotates a graphic image and zooms in and out around
the image. This is called "AutoPilot" mode. A brief text overview describing the board
appears along the left edge. Blue text at the bottom of the screen presents the menu system.
Rotary Knob/Push-button Menu System
The Spartan-3A Starter Kit board demonstration design uses the rotary knob and
surrounding push-button switches, shown in
system. The menu display appears in blue text at the bottom of the VGA output. The menu
functions are highlighted in
Spartan-3A FPGA Starter Kit Board User Guide
UG330 (v1.3) June 21, 2007
Text Description
Rotary/Push-Button Menu System
Figure 1-3: Rotating/Zooming Graphics, Menu System Displayed on VGA Screen
www.xilinx.com
Operating the Default Demonstration Design
Figure 1-3.
Rotating and Zooming Graphics
Figure 2-5, page
Table 1-1 and Figure 1-4.
(Figure 2-5, page 27) are
UG330_c1_03_032207
27, to implement a menu
15