参数资料
型号: HW-V4-ML405-UNI-G-J
厂商: Xilinx Inc
文件页数: 31/35页
文件大小: 0K
描述: EVALUATION PLATFORM VIRTEX-4
标准包装: 1
系列: Virtex®-4
类型: FPGA
适用于相关产品: XC4VFX20-FF672
所含物品: 评估平台,小型闪存卡,DDR2 DImm,LCD 显示器 - 不包括电源 -
Table 1-19:
R
Detailed Description
Frequency Synthesizer for SFP/SMA MGT Clocking
An Integrated Circuit Systems ICS843001-21 frequency synthesizer chip offers flexible,
low-jitter clock generation for the MGT pair connected to SFP and SMA interfaces. The
ICS843001-21 is connected to a 19.44-MHz crystal and a socketed 25-MHz oscillator (X7).
DIP switches (SW14) enable the user to select clock source and frequency synthesis options
to generate a number of commonly used frequencies for applications, such as Gigabit
Ethernet and SONET ( Table 1-19 ). For other frequencies, consult the ICS843001-21 data
sheet for more information. The 25-MHz oscillator is socketed to allow the user to change
the oscillator frequency and use the entire range of possible synthesized frequency
outputs.
Configurations for Clock Source and Frequency Options
DIP Switch SW14 [1:8] Value
SEL1 SEL0 M2 M1 M0 N2 N1
N0
Input Ref
Clock
(MHz)
M Divider N Divider
Value Value
V CO
(MHz)
Output
Frequency
(MHz)
Application
0
0
0
0
1
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
1
1
1
1
1
0
0
0
0
1
1
0
0
1
0
1
0
0
1
1
1
0
0
1
1
0
0
0
1
0
1
1
1
0
0
1
0
1
1
1
1
19.44
19.44
19.44
19.44
25
25
25
25
25
32
32
32
32
25
25
24
24
25
4
8
1
2
5
10
6
4
4
622.08
622.08
622.08
622.08
625
625
600
600
625
155.52
77.76
622.08
311.04 (1)
125
62.5
100
150
156.25
SONET
SONET
SONET
SONET
Gigabit Ethernet
Gigabit Ethernet
PCI Express
SATA
XAUI/SRIO
Notes:
1. Factory default setting.
2. A 1 equates to the DIP switch in the on position.
3. For Fibre Channel support, see Answer Record 24921 .
The native output of the ICS843001-21 is LVPECL, so a resistor network is present to
change the voltage swing to LVDS levels. The LVDS output is then multiplexed out
through Series AC coupling capacitors to allow the clock input of the FPGA to set the
common mode voltage.
ML405 Evaluation Platform
UG210 (v1.5.1) March 10, 2008
31
相关PDF资料
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HW-V4-ML410-UNI-G-J EVALUATION PLATFORM VIRTEX-4
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