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Chapter 3
Clock Sources
Overview
The Spartan?-3A FPGA Starter Kit board supports three primary clock input sources, as
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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 eight-pin DIP-style clock oscillator in the provided
socket.
CLK_50MHZ
(E12)
CLK_AUX
(V12)
CLK_SMA
(U12)
UG330_c3_02_012507
Figure 3-1: Clock Sources on Spartan-3A Starter Kit Board
Spartan-3A FPGA Starter Kit Board User Guide
UG330 (v1.3) June 21, 2007
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