dqs信号仿真设计odttdh DDR3系统中DQS信号的设计方法【摘要】本文针对DDR3系统中DQS信号完整性和时序等问题,以某自研的项目为依托,通过理论研究、前仿真预测、后仿真验证、回板测试等方法,为DQS信号设计出了拓扑结构,并在PCB中得以实现,从而实现了信号完整性。【关键词】DDR3;拓扑结构;仿真;信号完整性1.引言DDR3提...
dqs[0] Bidir PIN_H18 7A B7A_N0 PIN_H18 Differential 1.5-V SSTL Class I dqs_n[3] Bidir PIN_J11 7A B7A_N0 PIN_J11 Differential 1.5-V SSTL Class I dqs_n[2] Bidir PIN_K11 7A B7A_N0 PIN_K11 Differential 1.5-V SSTL Class I dqs_n[1] Bidir PIN_L11 7A B7A_N0 PIN_L11 Diffe...
board and am trying to add a DDR3 UniPHY controller. All is fine until I get to the fitter which gives me the error: error (176718): pin memory_mem_dqs_n[0] uses pseudo-differential output node rootport_fifo_qsys:u0|rootport_fifo_qsys_mem_if_ddr3_emif_0:mem_if_ddr3_emif_0|...
dqs[0] Bidir PIN_H18 7A B7A_N0 PIN_H18 Differential 1.5-V SSTL Class I dqs_n[3] Bidir PIN_J11 7A B7A_N0 PIN_J11 Differential 1.5-V SSTL Class I dqs_n[2] Bidir PIN_K11 7A B7A_N0 PIN_K11 Differential 1.5-V SSTL Class I dqs_n[1] Bidir PIN_L11 7A B7A_N0 PIN_L11 D...
Differential clock pair for external DDR3 interface should have ck and ck_n. However when doing the pin assignments it created another ck(n) and ck_n(n). Same also with dqs[1], dqs_n[1], dqs [0], dqs_n[0]... It created another dqs[1](n), dqs_n[1](n), dqs[0](n), ...
board and am trying to add a DDR3 UniPHY controller. All is fine until I get to the fitter which gives me the error: error (176718): pin memory_mem_dqs_n[0] uses pseudo-differential output node rootport_fifo_qsys:u0|rootport_fifo_qsys_mem_if_ddr3_emif_0:mem_if_ddr3_emif_0...
board and am trying to add a DDR3 UniPHY controller. All is fine until I get to the fitter which gives me the error: error (176718): pin memory_mem_dqs_n[0] uses pseudo-differential output node rootport_fifo_qsys:u0|rootport_fifo_qsys_mem_if_ddr3_emif_0:mem_if_ddr3_emif_0...
board and am trying to add a DDR3 UniPHY controller. All is fine until I get to the fitter which gives me the error: error (176718): pin memory_mem_dqs_n[0] uses pseudo-differential output node rootport_fifo_qsys:u0|rootport_fifo_qsys_mem_if_ddr3_emif_0:mem_if_ddr3_emif_0...
board and am trying to add a DDR3 UniPHY controller. All is fine until I get to the fitter which gives me the error: error (176718): pin memory_mem_dqs_n[0] uses pseudo-differential output node rootport_fifo_qsys:u0|rootport_fifo_qsys_mem_if_ddr3_emif_0:mem_if_ddr3_emif_0...
board and am trying to add a DDR3 UniPHY controller. All is fine until I get to the fitter which gives me the error: error (176718): pin memory_mem_dqs_n[0] uses pseudo-differential output node rootport_fifo_qsys:u0|rootport_fifo_qsys_mem_if_ddr3_emif_0:mem_if_ddr3_emif_0...