MicroBlaze Development Kit Spartan-3E 1600 Edition User Guide
19
UG257 (v1.1) December 5, 2007
www.xilinx.com
R
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-Bo
a
rd 50 MHz O
s
cill
a
tor
CLK_50MHz:[C9]
B
a
nk 0, O
s
cill
a
tor Volt
a
ge
(Controlled
b
y J
u
mper JP9)
S
MA Connector
8-Pin DIP O
s
cill
a
tor
S
ocket
CLK_AUX:[B8]
S
partan-
3
E
Development Board
UG257_0
3
_01_061
3
06
