深入解析ADVANTECH 288Pin DDR4 2133 VLP RDIMM 4GB內存模塊
在當今的電子設備中,內存模塊的性能和穩(wěn)定性至關重要。ADVANTECH的288Pin DDR4 2133 VLP RDIMM 4GB內存模塊(型號:AQD - D4U4GRV21 - SG)以其出色的性能和豐富的特性,成為眾多電子設備的理想選擇。下面,我們就來詳細了解一下這款內存模塊。
文件下載:AQD-D4U4GRV21-SG.pdf
一、模塊概述
1.1 基本描述
DDR4 VLP Registered DIMMs采用512Mx8bits DDR4 SDRAM的FBGA封裝和4K - bit串行EEPROM,安裝在288引腳的印刷電路板上,屬于雙列直插式內存模塊,可插入288引腳的邊緣連接器插座。其同步設計借助系統(tǒng)時鐘實現(xiàn)精確的周期控制,數(shù)據(jù)I/O事務可在DQS的兩個邊緣進行。該模塊具有廣泛的工作頻率和可編程延遲,適用于各種高帶寬和高性能的內存系統(tǒng)應用。
1.2 主要特性
- 環(huán)保合規(guī):符合RoHS標準,環(huán)??煽俊?/li>
- 電源要求:遵循JEDEC標準,采用1.2V ± 0.06V的電源供電,VDDQ同樣為1.2V ± 0.06V。
- 時鐘頻率:時鐘頻率為1067MHZ,數(shù)據(jù)傳輸速率可達2133Mb/s/Pin。
- 可編程特性:支持多種可編程功能,如可編程CAS延遲(10,11,12,13,14,15,16)、可編程附加延遲(Posted /CAS:0,CL - 2或CL - 1時鐘)、可編程/CAS寫延遲(CWL = 11, 14(DDR4 - 2133))等。
- 數(shù)據(jù)傳輸:具備8位預取功能,突發(fā)長度為4或8,采用雙向差分數(shù)據(jù)選通。
- 其他特性:擁有片內終端(ODT)引腳、串行存在檢測(EEPROM)、DIMM上熱傳感器、異步復位等功能。
二、引腳信息
2.1 引腳標識
| 該模塊的引腳眾多,每個引腳都有特定的功能。例如,A0 - A14為寄存器地址輸入,BA0、BA1為寄存器組選擇輸入,RAS_n為寄存器行地址選通輸入等。詳細的引腳功能可參考如下表格: | Symbol | Function |
|---|---|---|
| A0~A14 | Register address input | |
| BA0, BA1 | Register bank select input | |
| BG0, BG1 | Register bank group select input | |
| RAS_n | Register row address strobe input | |
| CAS_n | Register column address strobe input | |
| WE_n | Register write enable input | |
| CS0_n, CS1_n, CS2_n, CS3_n | DIMM Rank Select Lines input | |
| CKE0, CKE1 | Register clock enable lines input | |
| ODT0, ODT1 | Register on-die termination control lines input | |
| ACT_n | Register input for activate input | |
| DQ0~Q63 | DIMM memory data bus | |
| CB0~B7 | DIMM ECC check bits | |
| TDQS9_t~TDQS17_t TDQS9_c~TDQS17_c | Dummy loads for mixed populations of x4 based and x8 based RDIMMs. | |
| DQS0_t~DQS17_t | Data Buffer data strobes (positive line of differential pair) | |
| DQS0_c~DQS17_c | Data Buffer data strobes (negative line of differential pair) | |
| CK0_t, CK1_t | Register clock input (positive line of differential pair) | |
| CK0_c, CK1_c | Register clocks input (negative line of differential pair) | |
| SCL | I2C serial bus clock for SPD/TS and register | |
| SDA | I2C serial bus data line for SPD/TS and register | |
| SA0~SA2 | I2C slave address select for SPD/TS and register | |
| PAR | Register parity input | |
| VDD | SDRAM core power supply | |
| VREFCA | SDRAM command/address reference supply | |
| VSS | Power supply return (ground) | |
| VDDSPD | Serial SPD/TS positive power supply | |
| ALERT_n | Register ALERT_n output | |
| VPP | SDRAM activating power supply | |
| RESET_n | Set Register and SDRAMs to a Known State | |
| EVENT_n | SPD signals a thermal event has occurred. | |
| VTT | SDRAM I/O termination supply | |
| RFU | Reserved for future use | |
| NC | No Connection |
2.2 引腳分配
引腳分配表詳細列出了每個引腳的編號和名稱,如引腳01為12V 3,NC,引腳02為VSS等。需要注意的是,不同類型的DIMM(如UDIMMs、RDIMMs、LRDIMMs、NVDIMMs、Hybrid /NVDIMM)對部分引腳的定義有所不同。例如,引腳230在UDIMMs、RDIMMs和LRDIMMs中定義為NC,在NVDIMMs中定義為SAVE_n;引腳1和145在UDIMMs、RDIMMs和LRDIMMs中定義為NC,在Hybrid /NVDIMM中定義為12V。
三、電氣特性
3.1 工作溫度條件
該模塊的工作溫度范圍為0 - 85°C,這里的工作溫度指的是DRAM中心/頂部的表面溫度,測量條件可參考JESD51 - 2標準。在這個溫度范圍內,所有DRAM規(guī)格都能得到支持。
3.2 絕對最大直流額定值
- 電壓范圍:VDD相對于Vss的電壓范圍為 - 0.3 ~ 1.5V,VDDQ相對于Vss的電壓范圍同樣為 - 0.3 ~ 1.5V,VPP相對于Vss的電壓范圍為 - 0.3 ~ 3.0V,任何引腳相對于Vss的電壓范圍為 - 0.3 ~ 1.5V。
- 存儲溫度:存儲溫度范圍為 - 55 ~ +100°C,存儲溫度也是DRAM中心/頂部的表面溫度,測量條件參考JESD51 - 2標準。需要注意的是,VPP必須始終等于或大于VDD/VDDQ。
3.3 交流和直流工作條件
- 推薦直流工作條件:VDD的范圍為1.14 - 1.26V,典型值為1.2V;VDDQ的范圍為1.14 - 1.26V,典型值為1.2V;VPP的范圍為2.375 - 2.75V,典型值為2.5V。同時,VDDQ必須小于或等于VDD,VDDQ與VDD同步變化,直流帶寬限制為20MHz。
- 單端交流和直流輸入電平:對于命令和地址,I/O參考電壓(CMD/ADD)VREFCA(DC)范圍為0.49 VDDQ - 0.51 VDDQ,直流輸入邏輯高VIH(DC)范圍為VREF + 0.075 - VDD,直流輸入邏輯低VIL(DC)范圍為VSS - VREF - 0.075等。
- 差分交流和直流輸入電平:如差分輸入高直流VIHdiff(DC)最小為 + 0.150V,差分輸入低直流VILdiff(DC)最大為 - 0.150V等。
- 單端交流和直流輸出電平:直流輸出高測量電平VOH(DC)為1.1 VDDQ,直流輸出中測量電平VOM(DC)為0.8 VDDQ等。
- 差分交流和直流輸出電平:交流差分輸出高測量電平VOHdiff(AC)為 + 0.3 VDDQ,交流差分輸出低測量電平VOLdiff(AC)為 - 0.3 VDDQ。
四、電流參數(shù)
| 不同工作模式下,該模塊的電流參數(shù)不同。例如,在一個銀行激活 - 預充電工作模式下(IDD0),電流為810mA;在一個銀行激活 - 讀取 - 預充電工作模式下(IDD1),電流為855mA等。具體的電流參數(shù)如下表所示: | Parameter | Symbol | DDR4 2133 CL15 | Unit | |
|---|---|---|---|---|---|
| Operating One bank Active-Precharge current; tCK = tCK(IDD), tRC = tRC(IDD), tRAS = tRASmin(IDD); CKE is HIGH, /CS is HIGH between valid commands;Address bus inputs are SWITCHING; Data bus inputs are SWITCHING | IDD0 | 810 | mA | ||
| IDD4W | Operating One bank Active-read-Precharge current; IOUT = 0mA; BL = 8, CL = CL(IDD), AL = 0; tCK = tCK(IDD), tRC = tRC (IDD), tRAS = tRASmin(IDD), tRCD = tRCD(IDD); CKE is HIGH, /CS is HIGH between valid commands; Address bus inputs are SWITCHING; Data pattern is same as | IDD1 | 855 | mA | |
| Precharge power-down current ; All banks idle; tCK = tCK(IDD); CKE is LOW; Other control and address bus inputs are STABLE; Data bus inputs are FLOATING | IDD2P | 540 | mA | ||
| Precharge quiet standby current; All banks idle; tCK = tCK(IDD); CKE is HIGH, /CS is HIGH; Other control and address bus inputs are STABLE; Data bus inputs are FLOATING | IDD2Q | 702 | mA | ||
| Precharge standby current; All banks idle; tCK = tCK(IDD); CKE is HIGH, /CS is HIGH; Other control and address bus inputs are SWITCHING; Data bus inputs are SWITCHING | IDD2N | 828 | mA | ||
| Active power - down current; All banks open; tCK = tCK(IDD); CKE is LOW; | mA | ||||
| FLOATING | Other control and address bus inputs are STABLE; Data bus inputs are | IDD3P | 792 | ||
| Active standby current; All banks open; tCK = tCK(IDD), tRAS = tRASmax(IDD), tRP = tRP(IDD); CKE is HIGH, /CS is HIGH between valid commands; Other control and address bus inputs are SWITCHING; Data bus inputs are SWITCHING | IDD3N | 1134 | mA | ||
| IDD4W | Operating burst read current; All banks open, Continuous burst reads, IOUT = 0mA; BL = 4, CL = CL(IDD), AL = 0; tCK = tCK(IDD), tRAS = tRASmax(IDD), tRP = tRP(IDD); CKE is HIGH, /CS is HIGH between valid commands; Address bus inputs are SWITCHING; Data pattern is same as | IDD4R | 1620 | mA | |
| Operating burst write current; All banks open, Continuous burst writes; BL = 8, CL = CL(IDD), AL = 0; tCK = tCK(IDD), tRAS = tRASmax(IDD), tRP = tRP(IDD); CKE is HIGH, /CS is HIGH between valid commands; Address bus inputs are SWITCHING; Data bus inputs are SWITCHING IDD4R | IDD4W | 1710 | mA | ||
| Burst refresh current; tCK = tCK(IDD); Refresh command at every tRFC(IDD) interval; CKE is HIGH, /CS is HIGH between valid commands; Other control and address bus inputs are SWITCHING; Data bus inputs are SWITCHING | IDD5 | 1980 | mA | ||
| Self refresh current; CK and /CK at 0V; CKE ≒ 0.2V; Other control and address bus inputs are FLOATING; Data bus inputs are FLOATING | IDD6 | 360 | mA | ||
| Operating bank interleave read current; All bank interleaving reads, IOUT = 0mA; BL = 8, CL = CL(IDD), AL = tRCD(IDD)-1tCK(IDD); tCK = tCK(IDD), Trc = tRC(IDD), tRRD = tRRD(IDD), tRCD = 1tCK(IDD); CKE is HIGH, CS is HIGH between valid commands;Address bus inputs are STABLE during DESELECTs; Data pattern is same as IDD4R; | IDD7 | 1935 | mA |
需要注意的是,模塊的IDD是根據(jù)特定品牌DRAM(3Xnm)組件的IDD計算得出的,實際測量值可能會因DQ負載電容而有所不同。
五、時序參數(shù)
| 該模塊的時序參數(shù)眾多,涵蓋了時鐘周期、信號延遲、命令延遲等多個方面。例如,平均時鐘周期tCK的范圍為0.938 - <1.071ns,CK高電平寬度tCH為0.48 - 0.52tCK等。詳細的時序參數(shù)可參考如下表格: | Speed | DDR4 2133 | Unit | ||
|---|---|---|---|---|---|
| Parameter | Symbol | Min | Max | ||
| Average Clock Period | tCK | 0.938 | <1.071 | ns | |
| CK high-level width | tCH | 0.48 | 0.52 | tCK | |
| CK low-level width | tCL | 0.48 | 0.52 | tCK | |
| DQS_t,DQS_c to DQ skew, per group, per access | tDQSQ | - | TBD | tCK/2 | |
| DQS_t,DQS_c to DQ Skew determin-istic, per group, per access | tDQSQ | - | TBD | tCK/2 | |
| DQ output hold time from DQS_t,DQS_c | tQH | TBD | - | tCK/2 | |
| DQS_t,DQS_c to DQ Skew total, per group, per access; DBI enabled | tDQSQ | - | TBD | UI | |
| DQ output hold time total from DQS_t, DQS_c; DBI enabled | tQH | TBD | - | UI | |
| DQ to DQ offset , per group, per ac-cess referenced to DQS_t, DQS_c | tDQSQ | TBD | TBD | UI | |
| DQS_t, DQS_c differential READ Pre-amble (2 clock preamble) | tRPRE | 0.9 | TBD | tCK | |
| DQS_t, DQS_c differential READ Postamble | tRPST | TBD | TBD | tCK | |
| DQS_t, DQS_c differential WRITE Preamble | tWPRE | 0.9 | - | tCK | |
| DQS_t, DQS_c differential WRITE Postamble | tWPST | TBD | TBD | tCK | |
| DQS_t and DQS_c low-impedance time (Referenced from RL-1) | tLZ(DQS) | -360 | 180 | ps | |
| DQS_t and DQS_c high-impedance time (Referenced from RL+BL/2) | tHZ(DQS) | - | 180 | ps | |
| DQS_t, DQS_c differential input low pulse width | tDQSL | 0.46 | 0.54 | tCK | |
| DQS_t, DQS_c differential input high pulse width | tDQSH | 0.46 | 0.54 | tCK | |
| DQS_t, DQS_c rising edge to CK_t, CK_c rising edge (1 clock preamble) | tDQSS | -0.27 | 0.27 | tCK | |
| DQS_t, DQS_c falling edge setup time to CK_t, CK_c rising edge | tDSS | 0.18 | - | tCK | |
| DQS_t, DQS_c falling edge hold time from CK_t, CK_c rising edge | tDSH | 0.18 | - | tCK | |
| Delay from start of internal write trans-action to internal read command for different bank group | tWTR_S | Max(2nCK, 2.5ns) | - | ||
| Delay from start of internal write trans-action to internal read command for same bank group | tWTR_L | Max(4nCK,7.5ns) | - | ||
| WRITE recovery time | tWR | 15 | - | ns | |
| Mode Register Set command cycle time | tMRD | 8 | - | nCK | |
| CAS_n to CAS_n command delay for same bank group | tCCD_L | 6 | - | nCK | |
| CAS_n to CAS_n command delay for different bank group | tCCD_S | 4 | - | nCK | |
| Auto precharge write recovery + precharge time | tDAL | tWR+tRP/tCK | nCK | ||
| ACTIVATE to ACTIVATE Command delay to different bank group for 2KB page size | tRRD_S(2K) | Max(4nCK,5 |
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深入解析ADVANTECH 288Pin DDR4 2133 VLP RDIMM 4GB內存模塊
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