Digilent 410-087P-KIT - Manual (Page 21)

Spartan-3E Starter Kit Board User Guide www.xilinx.com 21
UG230 (v1.0) March 9, 2006
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Chapter 3
Clock Sources
Overview
As shown in Figure 3-1 , the Spartan-3E Starter Kit board supports three primary clock
input sources, all of which are located below the Xilinx logo, near the Spartan-3E logo.
• The board includes an on-board 50 MHz clock oscillator.
•
Clocks can be supplied off-board via an SMA-style connector. Alternatively, the FPGA
can generate clock signals or other high-speed signals on the SMA-style connector.
• Optionally install a separate 8-pin DIP-style clock oscillator in the supplied socket.
Figure 3-1: Available Clock Inputs
UG230_c3_01_030306
Bank 0, Oscillator Voltage
Controlled by Jumper JP9
8-Pin DIP Oscillator Socket
CLK_AUX: (B8)
SMA Connector
CLK_SMA: (A10)
On-Board 50 MHz Oscillator
CLK_50MHz: (C9)