16 www.xilinx.com Spartan-3A/3AN Starter Kit Board User GuideUG334 (v1.0) May 28, 2007Chapter 1: Introduction and Overview RSelect MultiBoot Configuration ImageSpartan-3A/3AN FPGAs support a selectable MultiBoot configuration interface. If theFPGA configures in one of its Master configuration modes, then the FPGA always loadsthe configuration image stored at address 0 in Flash at power-up, or whenever thePROG_B button is pressed.Spin the rotary knob to select a new FPGA configuration image. The blue text at the bottomof the display updates with each click of the rotary knob. For example, the applicationdisplays “Buttons: Load Configuration x” where ‘x’ corresponds to the bitstream imagelisted in Table 1-2. Table 1-2 describes the bitstreams preloaded on the board.After selecting the desired image, press one of the four push-button switches that surroundthe rotary knob. This action causes the FPGA to load the selected image from externalFlash memory.To change to the “Scroll or Rotate Graphic” mode, press the rotary knob.Table 1-1: Function of Each Menu ControlPress Knob Rotate Knob Press Push ButtonMove to next menu selection,next mode.Depends on current mode, asshown in Figure 1-4.Depends on current mode, asshown in Figure 1-4.Figure 1-4: Rotary Knob/Push-Button Menu SystemButtons: Load Configuration 1.Knob Spin: Select Configuration.Knob Push: More Options ...Buttons: Scroll Image.Knob Spin: Rotate Image.Knob Push: More Options ...Buttons: Scroll Image.Knob Spin: Scale Image.Knob Push: More Options ...Buttons: Restart AutoPilot.Knob Spin: Adjust Volume.Knob Push: More Options ...Press KnobPress KnobPress KnobPress KnobStart Demonstration DesignPower-up boardPress PROG_B buttonConfig. 1Config. 2Config. 3Config. 4MultiBootMultiBootSelect FPGAMultiBootMultiBootAutoPilotAutoPilotAutoPilotAutoPilotUG334_c1_04_052707RotateScaleVolumeConfigurationSelect MultiBootScroll/Rotate GraphicScroll/Scale GraphicAutoPilot/Volume
