参数资料
型号: HW-SPAR3ADDR2-DK-UNI-G
厂商: Xilinx Inc
文件页数: 69/140页
文件大小: 0K
描述: KIT DEV SPARTAN 3A DDR2 SDRAM
产品变化通告: Adapter Replacement 23/May/2008
Development Systems Discontinuation 12/Jan/2009
标准包装: 1
系列: Spartan®-3A
主要目的: 存储器,DDR2
嵌入式: 是,FPGA / CPLD
已用 IC / 零件: XC3S700A
主要属性: DDR2 接口
次要属性: 图形用户界面
已供物品: 板,线缆,CD,电源
其它名称: 122-1575
R
Voltage Supply
The magnitude of the X and Y values represents the rate of mouse movement. The larger
the value, the faster the mouse is moving. The XV and YV bits in the status byte indicate
when the X or Y values exceed their maximum value, an overflow condition. A ‘1’
indicates when an overflow occurs. If the mouse moves continuously, the 33-bit
transmissions repeat every 50 ms or so.
The L, R, and C fields in the status byte correspond to Left, Right, and Center button
presses. A ‘1’ indicates that the associated mouse button is being pressed.
Voltage Supply
The PS/2 port on the Spartan-3A/3AN Starter Kit board is powered by 5V. Although the
Spartan-3A/3AN FPGA is not a 5V-tolerant device, it can communicate with a 5V device
using 270 Ω series current-limiting resistors, as shown in Figure 8-1, page 65 .
Adding a Second PS/2 Port Using a Y-Splitter Cable
Most applications that use the PS/2 port will connect a mouse or a keyboard directly to the
Spartan-3A/3AN Starter Kit board connector. These applications use the primary FPGA
connections to the PS/2 port, as shown in Figure 8-1, page 65 .
However, it is possible to include a second PS/2 port by connecting a PS/2 Y-splitter cable
to the PS/2 connector on the board. Figure 8-6 shows an example of such a cable. The
Spartan-3A/3AN Starter Kit does not include such a cable but one can be purchased from
a local electronics supply store or via the web. Some example vendors and part numbers
are listed below. Check various vendors and suppliers as prices vary greatly!
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StarTech PS/2 Keyboard/Mouse Y-splitter Cable, KYC1MF
American Power Conversion (APC) Mouse and Keyboard Splitter Cable, 62305-1
Belkin Pro Series Notebook Y Cable, F3G117-01
Tripp Lite, P230-001
QVS CC321Y
ComputerCableStore.com, 8-1718Y-00.5
CablesToGo, 08017
UG330_c8_02_012507
Figure 8-6: Example PS/2 Y-Splitter Cable
When using the splitter cable, use both sets of FPGA connections listed in Figure 8-1,
page 65 and Table 8-1, page 65 . The primary connections appear at one side of the
Y-splitter while the secondary connections appear at the other side of the Y-splitter.
Spartan-3A/3AN FPGA Starter Kit Board User Guide www.xilinx.com
UG334 (v1.1) June 19, 2008
69
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