1.4.Pull type(上下拉类型) 1.5.On-chip termination(输入端/输出端的内置片上端接电阻) 当使用高速IO接口时,在接收端通常需要匹配的端接电阻,有利于高低电平的转换和提高信号的完整性,且端接电阻尽可能的放置在接收端。 1.5.1 差分输入端接电阻配置 通常需要在差分输入端并行端接100Ω的电阻,FPGA在差分输入接...
I/O Std,Vcco,Slew,Drive Strength:显示I/O端口的参数值; Off-Chip Termination:显示每个I/O标准的默认端接。比如FP_VTT_50表示远端并联50Ω的VTT端接类型;HSTL_1表示远端并联40Ω的VTT端口类型。具体的端接类型可以在ug471(7系列)和ug571(UltraScale系列)中查看; Remaining Margin %:显示Bank中剩余的噪声裕...
[答:Johnli] stratixII suport the following on-chip termination method: 1.Differential termination (RD) 2.Series termination (RS) without calibration 3.Series termination (RS) with calibration [2006-2-23 11:04:04] [问:nafata] 信号完整性损伤主要包括反射、串扰、振荡、接地反弹等多个方面,一般来...
4、GA development for high-speed and highly integrated image storage and display system provides a new approach and solution ideas, FPGA itself has a powerful logic resources and use off-chip resource allocation and modular design ideas can be realized Images storage and display system.Thesis, Alte...
离线驱动(OCD )阻抗调整OCD (Off-Chip Driver)的原理是通过调整I/O接口的电压(驱动强度),来补偿上拉与下拉电阻值,目的是让DQS 与DQ 之间的时间偏差降至最小,进而提高信号的完整性。由于在一般情况下电子 56、设备对应用环境稳定度要求并不太高,DDR2的差分DQS 就基本可以保证同步的准确性,因此OCD 功能主要应用...
turns off when in output mode or when 3-stated, saving considerable power compared to off-chip termination. The I/Os also have low power modes for IBUF and IDELAY to provide further power savings, especially when used to implement memory interfaces. I/O Logic Input and Output Delay All...
RX_ONCHIP_TERMINATION_R_Ohms). 2(100ohms) EnableFGTRXACDISABLEEnableRXexternalACcouplingsetting.Defaultvalueis CoupleENABLEENABLE. EnableFGTVSRmodeVSR_MODE_LOW_LOSSEnableVSRmodesetting.Defaultvalueis VSR_MODE_HIGH_LOSSVSR_MODE_DISABLE. VSR_MODE_DISABLE Figure5.AnalogParameterOptionsforFHTPMAinParameterEdit...
useWasobservedtheimagebyImageViewertoolinVisualDSP++Wasalsoobserved.Theresultsshowthatthematchedterminationdoesnotofon・chipdifferentialsis,mldeterioratedofferentialsignal,greatlyreducesPCBboardspace,andmakesthematchingaboutterminalmoreflexible.Keywords:differentialsignal;impedancematching;on-chiptermination(OCT);FPGA...
TerminationERMINATION_ERMINATION_R_1(85Ohms)R_1(85_OhmsRX_ONCHIP_T)ERMINATION_R_2(100ohms)EnableFGTRXACDISABLEENABLEEnableRXexternalACcouplingsetting.CoupleENABLEEnableFGTVSRModeVSR_MODE_LOVSR_MODE_DIEnableVSRmodesetting.W_LOSSSABLEVSR_MODE_HI...
10、g chip early, usually its speed of operation and design flexibility are low.fpga development for high-speed and highly integrated image storage and display system provides a new approach and solution ideas, fpga itself has a powerful logic resources and use off-chip resource allocation and mo...