Virtex-5 LXT/SXT/FXT FPGA Prototype Platform
www.xilinx.com
21
UG229 (v3.0.1) May 21, 2008
Detailed Description
R
10. Oscillator Sockets
The board has four crystal oscillator sockets (X1, X2, X3, X4), all wired for standard
LVTTL-type oscillators. These sockets connect to the DUT clock pads (
Table 6
). Onboard
termination resistors can be changed by the user. The oscillator sockets accept both half-
and full-sized oscillators and are powered by the DUT VCCO power supply.
11. Differential Clock Inputs
In addition to the oscillator sockets, there are eight 50
Ω
SMA connectors (J5, J6, J7, J8, J9,
J10, J11, J12) that allow connection to an external function generator. These connect to the
DUT clock pads (
Table 7
). They can also be used as differential clock inputs. The
differential clock pairings (differential pairs) are as shown in
Table 7
.
Table 6:
Oscillator Socket Clock Pin Connections
Label
Clock Name
Pin Number
FF665
FF1136
FF1738
OSC Socket
Top 1
IO_L1P_CC_GC_3
D16
K17
M26
OSC Socket
Top 2
IO_L1N_CC_GC_3
E16
L18
L27
OSC Socket
Bottom 1
IO_L8P_CC_GC_4
AC17
AF18
AL27
OSC Socket
Bottom 2
IO_L8N_CC_GC_4
AB16
AE18
AL26
Table 7:
SMA Clock Pin Connections
Label
Clock Name
Pin Number
FF665
FF1136
FF1738
P
IO_L0P_CC_GC_3
D15
H17
J16
N
IO_L0N_CC_GC_3
E15
H18
J15
P
IO_L9P_GC_3
F20
H19
K30
N
IO_L9N_GC_3
G21
H20
L30
P
IO_L9P_CC_GC_4
AB15 AH18
AP16
N
IO_L9N_CC_GC_4
AC16 AG17
AP15
P
IO_L6P_GC_4
AC18 AG18
AM27
N
IO_L6N_GC_4
AB17
AF19
AM26
