参数资料
型号: HW-V5-ML507-UNI-G
厂商: Xilinx Inc
文件页数: 19/60页
文件大小: 0K
描述: EVAL PLATFORM V5 FXT
标准包装: 1
系列: Virtex®-5 FXT
类型: FPGA
适用于相关产品: ML507
所含物品: ML507 平台,DVI 适配器,小型闪存卡和 SATA 转接线
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Detailed Description
DDR2 Memory Expansion
The DDR2 interface support user installation of SODIMM modules with more memory
since higher order address and chip select signals are also routed from the SODIMM to the
FPGA.
DDR2 Clock Signal
Two matched length pairs of DDR2 clock signals are broadcast from the FPGA to the
SODIMM. The FPGA design is responsible for driving both clock pairs with low skew. The
delay on the clock trace is designed to match the delay of the other DDR2 control signals.
DDR2 Signaling
All DDR2 SDRAM control signals are terminated through 47 Ω resistors to a 0.9V VTT
reference voltage. The FPGA DDR2 interface supports SSTL18 signaling and all DDR2
signals are controlled impedance. The DDR2 data, mask, and strobe signals are matched
length within byte groups. The ODT functionality of the SODIMM should be utilized.
3. Differential Clock Input and Output with SMA Connectors
High-precision clock signals can be input to the FPGA using differential clock signals
brought in through 50 Ω SMA connectors. This allows an external function generator or
other clock source to drive the differential clock inputs that directly feed the global clock
input pins of the FPGA. The FPGA can be configured to present a 100 Ω termination
impedance.
A differential clock output from the FPGA is driven out through an LVDS clock
multiplexer (U12) onto a second pair of SMA connectors (J12 and J13). This allows the
FPGA to drive a precision clock to an external device such as a piece of test equipment.
Table 1-3 summarizes the differential SMA clock pin connections.
Table 1-3:
Differential SMA Clock Connections
Connector
J10
J11
J12 (1)
J13 (1)
Clock Name
SMA_DIFF_CLK_IN_P
SMA_DIFF_CLK_IN_N
SMA_DIFF_CLK_OUT_P
SMA_DIFF_CLK_OUT_N
FPGA Pin
H14
H15
J20
J21
ML505/ML506
GTP1 of
GTP_X0Y4
receive pair
GTP1 of
GTP_X0Y4
transmit pair
ML507
GTX1 of
GTX_X0Y5
receive pair
GTX1 of
GTX_X0Y5
transmit pair
Notes:
1. When jumper J54 (located near the battery) is not shunted (default), the FPGA differential clock output
is selected on U12 and driven out to the SMA connectors, J12 and J13.
4. Oscillators
The board has one crystal oscillator socket (X1) wired for standard LVTTL-type oscillators.
It connects to the FPGA clock pin as shown in Table 1-4, page 20 . The X1 socket is
populated with a 100-MHz oscillator and is powered by the 3.3V supply.
The board also provides an IDT5V9885 (U8) EEPROM programmable clock generator
device. This device is used to generate a variety of clocks to the board peripherals and
ML505/ML506/ML507 Evaluation Platform
UG347 (v3.1.2) May 16, 2011
19
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