读命令 READTiming 读命令相关的时序参数可以分为三类 总体读时序 Read Timing 时钟-数据有效信号(Strobe)间的时序关系 Clock to Data Strobe relationship 数据-数据有效信号间的时序关系 Data Strobe to Data relationship 1、Read Timing CL (CAS latency) Column-Address-Strobe 当列地址在地址信号上就绪时,CL 是...
RAS: Row Address Strobe,行地址选通脉冲; CAS: Column Address Strobe,列地址选通脉冲; tRCD: RAS to CAS Delay,RAS至CAS延迟; CL: CAS Latency,CAS与读取命令发出到第一笔数据输出的时间; RL: Read…
tRTP Timing 前一篇对DDR有了简单介绍,有了初步了解后,介绍DDR Timing相关参数就容易了。 tRRD Timing RRD(Row to Row Delay,active to active command period time,切换行的延迟)一般指切换行所需要的时间;如图1 tRRD_S:S(Short),指的是不同Bank group切换所需要的时间; tRRD_L:L(Long),指的是同一个Ban...
motion of technical information and ideas.DDR SDRAM Functionality andController Read Data CaptureF○ollowing conventional the timing budget and several possible○○(PC100/PC133) circuit implementations for the○SDRAM, the next stage memory controller.○○of evolutionary migra-○tion for standard DDR vs...
系统标签: ddr timing prefetch sdrams data sdr Volume8,Issue33Q99DDRSDRAMFunctionalityandControllerReadDataCaptureThisIssue:DDRSDRAMFunctionalityandControllerReadDataCaptureFAquarterlypublicationdedicatedtothepromotionoftechnicalinformationandideas.WiththedefinitionofDDRIInowinprogress,theoriginalDDRdefinitionisnowalso...
DDR_TimingDDR RAM Read/Write timing Test point: CLK, CLKB (select one) /RAS, /CAS, /WE, A0, DQ0, LDQS Noted: 1.Check the DDR RAM PN to get the clock frequency, and probe and scope’s operating frequency should higher than DDR RAM 2.the test wire solder on pin should less ...
DDRtiming指标规范要求
DDR3_timing指标规范要求 下载积分: 150 内容提示: Supported CWL SettingsSupported CL SettingsCL = 6CL = 5periodCWL = 5CWL = 5ACT to PRE command command periodACT to ACT or REF PRE command periodwrite delay timeACT to internal read or first dataInternal read command to ParameterCL - nRCD...
DDR3_timing指标规范要求.pdf,JEDEC Standard No. 79-3A Page 144 12 Electrical Characteristics AC Timing for DDR3-800 to DDR3-1600 (Cont’d) 12.3 Standard Speed Bins DDR3 SDRAM Standard Speed Bins include tCK, tRCD, tRP, tRAS and tRC for each corresponding
DDR3-800 DDR3-1066 DDR3-1333 DDR3-1600 Parameter Symbol Min Max Min Max Min Max Min Max Units Notes Clock Timing Minimum Clock Cycle Time (DLL off mode) tCK(DLL_OF F) 8 - 8 - 8 - 8 - ns 6 Average Clock Period tCK(avg) See 12.3 “Standard Speed Bins” on page 144 ps Avera...