MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide 19
UG257 (v1.1) December 5, 2007 www.xilinx.com
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Chapter 3
Clock Sources
Overview
As shown in Figure 3-1, the MicroBlaze Development Kit board supports three primary
clock input sources, all of which are located below the Xilinx logo, near the Spartan-3E
logo.
x The board includes an on-board 50 MHz clock oscillator.
x The user clock socket is populated with a 66 MHz oscillator
x 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.
x Optionally install a separate 8-pin DIP-style clock oscillator in the supplied socket
.
Figure 3-1: Available Clock Inputs
On-Board 50 MHz Oscillator
CLK_50MHz:[C9]
Bank 0, Oscillator Voltage
(Controlled by Jumper JP9)
SMA Connector
8-Pin DIP Oscillator Socket
CLK_AUX:[B8]
Spartan-3E
Development Board
UG257_03_01_061306
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