Digilent 410-044-10P-KIT - Manual (Page 20)

20 www.xilinx.com Spartan-3 Starter Kit Board User Guide
1-800-255-7778 UG130 (v1.1) May 13, 2005
Chapter 4: Switches and LEDs R
LEDs
The Spartan-3 Starter Kit board has eight individual surface-mount LEDs located above
the push button switches, indicated by
in Figure 1-2 . The LEDs are labeled LED7
through LED0. LED7 is the left-most LED, LED0 the right-most LED. Table 4-3 shows the
FPGA connections to the LEDs.
The cathode of each LED connects to ground via a 270
Ω resistor. To light an individual
LED, drive the associated FPGA control signal High, which is the opposite polarity from
lighting one of the 7-segment LEDs.
Table 4-3: LED Connections to the Spartan-3 FPGA
LED LD7 LD6 LD5 LD4 LD3 LD2 LD1 LD0
FPGA Pin P11 P12 N12 P13 N14 L12 P14 K12
12