参数资料
型号: XC3S200-4VQ100I
厂商: Xilinx Inc
文件页数: 206/272页
文件大小: 0K
描述: IC FPGA SPARTAN 3 100VQFP
标准包装: 90
系列: Spartan®-3
LAB/CLB数: 480
逻辑元件/单元数: 4320
RAM 位总计: 221184
输入/输出数: 63
门数: 200000
电源电压: 1.14 V ~ 1.26 V
安装类型: 表面贴装
工作温度: -40°C ~ 100°C
封装/外壳: 100-TQFP
供应商设备封装: 100-VQFP(14x14)
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页第179页第180页第181页第182页第183页第184页第185页第186页第187页第188页第189页第190页第191页第192页第193页第194页第195页第196页第197页第198页第199页第200页第201页第202页第203页第204页第205页当前第206页第207页第208页第209页第210页第211页第212页第213页第214页第215页第216页第217页第218页第219页第220页第221页第222页第223页第224页第225页第226页第227页第228页第229页第230页第231页第232页第233页第234页第235页第236页第237页第238页第239页第240页第241页第242页第243页第244页第245页第246页第247页第248页第249页第250页第251页第252页第253页第254页第255页第256页第257页第258页第259页第260页第261页第262页第263页第264页第265页第266页第267页第268页第269页第270页第271页第272页
Spartan-3 FPGA Family: Functional Description
DS099 (v3.1) June 27, 2013
Product Specification
39
DFS Clock Output Connections
There are two basic cases that determine how to connect the DFS clock outputs: on-chip and off-chip, which are illustrated
in sections [a] and [c], respectively, of Figure 21. This is similar to what has already been described for the DLL component.
In the on-chip case, it is possible to connect either of the DFS’s two output clock signals through general routing resources
to the FPGA’s internal registers. Either a Global Clock Buffer (BUFG) or a BUFGMUX affords access to the global clock
network. The optional feedback loop is formed in this way, routing CLK0 to a global clock net, which in turn drives the CLKFB
input.
In the off-chip case, the DFS’s two output clock signals, plus CLK0 for an optional feedback loop, can exit the FPGA using
output buffers (OBUF) to drive a clock network plus registers on the board. The feedback loop is formed by feeding the CLK0
signal back into the FPGA using an IBUFG, which directly accesses the global clock network, or an IBUF. Then, the global
clock net is connected directly to the CLKFB input.
Phase Shifter (PS)
The DCM provides two approaches to controlling the phase of a DCM clock output signal relative to the CLKIN signal: First,
there are nine clock outputs that employ the DLL to achieve a desired phase relationship: CLK0, CLK90, CLK180, CLK270,
CLK2X, CLK2X180, CLKDV CLKFX, and CLKFX180. These outputs afford “coarse” phase control.
The second approach uses the PS component described in this section to provide a still finer degree of control. The PS
component is only available when the DLL is operating in its low-frequency mode. The PS component phase shifts the DCM
output clocks by introducing a "fine phase shift" (TPS) between the CLKFB and CLKIN signals inside the DLL component.
The user can control this fine phase shift down to a resolution of 1/256 of a CLKIN cycle or one tap delay (DCM_TAP),
whichever is greater. When in use, the PS component shifts the phase of all nine DCM clock output signals together. If the
PS component is used together with a DCM clock output such as the CLK90, CLK180, CLK270, CLK2X180 and CLKFX180,
then the fine phase shift of the former gets added to the coarse phase shift of the latter.
PS Component Enabling and Mode Selection
The CLKOUT_PHASE_SHIFT attribute enables the PS component for use in addition to selecting between two operating
modes. As described in Table 20, this attribute has three possible values: NONE, FIXED and VARIABLE. When
CLKOUT_PHASE_SHIFT is set to NONE, the PS component is disabled and its inputs, PSEN, PSCLK, and PSINCDEC,
must be tied to GND. The set of waveforms in section [a] of Figure 22 shows the disabled case, where the DLL maintains a
zero-phase alignment of signals CLKFB and CLKIN upon which the PS component has no effect. The PS component is
enabled by setting the attribute to either the FIXED or VARIABLE values, which select the Fixed Phase mode and the
Variable Phase mode, respectively. These two modes are described in the sections that follow
Determining the Fine Phase Shift
The user controls the phase shift of CLKFB relative to CLKIN by setting and/or adjusting the value of the PHASE_SHIFT
attribute. This value must be an integer ranging from –255 to +255. The PS component uses this value to calculate the
desired fine phase shift (TPS) as a fraction of the CLKIN period (TCLKIN). Given values for PHASE-SHIFT and TCLKIN, it is
possible to calculate TPS as follows:
TPS = TCLKIN(PHASE_SHIFT/256)
Equation 4
Both the Fixed Phase and Variable Phase operating modes employ this calculation. If the PHASE_SHIFT value is zero, then
CLKFB and CLKIN will be in phase, the same as when the PS component is disabled. When the PHASE_SHIFT value is
positive, the CLKFB signal will be shifted later in time with respect to CLKIN. If the attribute value is negative, the CLKFB
signal will be shifted earlier in time with respect to CLKIN.
The Fixed Phase Mode
This mode fixes the desired fine phase shift to a fraction of the TCLKIN, as determined by Equation 4 and its user-selected
PHASE_SHIFT value P. The set of waveforms insection [b] of Figure 22 illustrates the relationship between CLKFB and
CLKIN in the Fixed Phase mode. In the Fixed Phase mode, the PSEN, PSCLK and PSINCDEC inputs are not used and
must be tied to GND. Fixed phase shift requires ISE software version 10.1.03 or later.
相关PDF资料
PDF描述
ACB91DHRT-S621 CONN EDGECARD EXTEND 182POS .050
ABB91DHRT-S621 CONN EDGECARD EXTEND 182POS .050
ACB91DHRT-S578 CONN EDGECARD EXTEND 182POS .050
ABB91DHRT-S578 CONN EDGECARD EXTEND 182POS .050
ACB90DHFT CONN EDGECARD 180POS .050 SMD
相关代理商/技术参数
参数描述
XC3S200-4VQG100C 功能描述:SPARTAN-3A FPGA 200K STD 100VQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - FPGA(现场可编程门阵列) 系列:Spartan®-3 标准包装:40 系列:Spartan® 6 LX LAB/CLB数:3411 逻辑元件/单元数:43661 RAM 位总计:2138112 输入/输出数:358 门数:- 电源电压:1.14 V ~ 1.26 V 安装类型:表面贴装 工作温度:-40°C ~ 100°C 封装/外壳:676-BGA 供应商设备封装:676-FBGA(27x27)
XC3S200-4VQG100I 功能描述:SPARTAN-3 FPGA 200K STD 100VQFP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - FPGA(现场可编程门阵列) 系列:Spartan®-3 标准包装:24 系列:ECP2 LAB/CLB数:1500 逻辑元件/单元数:12000 RAM 位总计:226304 输入/输出数:131 门数:- 电源电压:1.14 V ~ 1.26 V 安装类型:表面贴装 工作温度:0°C ~ 85°C 封装/外壳:208-BFQFP 供应商设备封装:208-PQFP(28x28)
XC3S200-5CP132C 制造商:XILINX 制造商全称:XILINX 功能描述:Spartan-3 FPGA
XC3S200-5CP132I 制造商:XILINX 制造商全称:XILINX 功能描述:Spartan-3 FPGA
XC3S200-5CPG132C 制造商:XILINX 制造商全称:XILINX 功能描述:Spartan-3 FPGA Family: Complete Data Sheet