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DDR4

DDR4內存是新一代的內存規格。2011年1月4日，三星電子完成第一條DDR4內存。

DDR4標準 JESD79_4

1. Scope ......................................................................................................................................................................... 12. DDR4 SDRAM Package Pinout and Addressing ....................................................................................................... 22.1 DDR4 SDRAM Row for X4,X8 and X16 ................................................................................................................22.2 DDR4 SDRAM Ball Pitch........................................................................................................................................22.3 DDR4 SDRAM Columns for X4,X8 and X16 ..........................................................................................................22.4 DDR4 SDRAM X4/8 Ballout using MO-207......................................................................................................... 22.5 DDR4 SDRAM X16 Ballout using MO-207.............................................................................................................32.6 Pinout Description ..................................................................................................................................................52.7 DDR4 SDRAM Addressing.....................................................................................................................................73. Functional Description ...............................................................................................................................................83.1 Simplified State Diagram ....................................................................................................................................83.2 Basic Functionality..................................................................................................................................................93.3 RESET and Initialization Procedure .....................................................................................................................103.3.1 Power-up Initialization Sequence .............................................................................................................103.3.2 Reset Initialization with Stable Power ......................................................................................................113.4 Register Definition ................................................................................................................................................123.4.1 Programming the mode registers .............................................................................................................123.5 Mode Register ......................................................................................................................................................134. DDR4 SDRAM Command Description and Operation ............................................................................................. 244.1 Command Truth Table ..........................................................................................................................................244.2 CKE Truth Table ...................................................................................................................................................254.3 Burst Length, Type and Order ..............................................................................................................................264.3.1 BL8 Burst order with CRC Enabled .........................................................................................................264.4 DLL-off Mode & DLL on/off Switching procedure ................................................................................................274.4.1 DLL on/off switching procedure ...............................................................................................................274.4.2 DLL “on” to DLL “off” Procedure ..............................................................................................................274.4.3 DLL “off” to DLL “on” Procedure ..............................................................................................................284.5 DLL-off Mode........................................................................................................................................................294.6 Input Clock Frequency Change ............................................................................................................................304.7 Write Leveling.......................................................................................................................................................314.7.1 DRAM setting for write leveling & DRAM termination function in that mode ............................................324.7.2 Procedure Description .............................................................................................................................334.7.3 Write Leveling Mode Exit .........................................................................................................................34

標簽： DDR4

上傳時間： 2022-01-09

上傳用戶：
DDR4板設計及信號完整性驗證的挑戰

DDR4板設計及信號完整性驗證的挑戰

標簽： DDR4

上傳時間： 2022-04-30

上傳用戶：
4顆DDR4參考PCB

賽靈思原廠提供的ZCU芯片帶4顆DDR4的設計PCB，提供給有需要的朋友參考。

標簽： DDR4 pcb

上傳時間： 2022-05-19

上傳用戶：
JEDEC_官方標準文檔_JESD79-2F ，涵蓋DDR~DDR4

JEDEC 官方標準文檔涵蓋DDR~DDR4

標簽： DDR2 JEDEC標準

上傳時間： 2022-06-08

上傳用戶：
DDR4 JESD79 標準

JESD79標準，DDR4應用，DDR4驅動標準

標簽： DDR4 jesd79 標準

上傳時間： 2022-06-30

上傳用戶：jason_vip1
全志H6 開發板評估板 CADENCE_ORCAD硬件原理圖+PCB文件

全志H6 開發板評估板 CADENCE_ORCAD硬件原理圖+PCB文件，全志H6采用arm 四核A53架構，搭配MaliT720 GPU，支持OpenGL3.1，支持DDR4、EMMC5.0，芯片性能比上一代提高77%，解碼支持4K@60fps，最高分辨率可達6K(5780×2890)，支持 HDR10、HLG，并集成Allwinner Smartcolor3.0智能畫質引擎，另外，H6還提供了多種高速接口，包括USB3.0，PCIe2.0，千兆網口等，傳輸更快，信號更強。

標簽： h6開發板 orcad

上傳時間： 2022-05-12

上傳用戶：XuVshu
DDR4PCB設計規則

DDR4的PCB設計規則：設計規則設置及分組。

標簽： DDR4 PCB設計

上傳時間： 2022-05-22

上傳用戶：canderile
Rockchip RK3328 Datasheet

RK3328手冊RK3328 is a high-performance Quad-core application processor designed for Smart STB(Set Top Box) including OTT/IPTV/DVB. It is a high-integration and cost efficient SOC for 4KHDR STB.Quad-core Cortex-A53 is integrated with separate Neon and FPU coprocessor, also withshared L2 Cache. The Quad-core GPU supports high-resolution display and game.Lots of high-performance interface to get very flexible solution, such as multi-channeldisplay including HDMI2.0a and TV Encoder (CVBS). TrustZone and crypto hardware areintegrated for security. 32bits DDR3/DDR3L/DDR4/LPDDR3 provides high memorybandwidth.

標簽： rockchip rk3328

上傳時間： 2022-08-10

上傳用戶：
超實用【2-16層】高速PCB設計案例分享（原理圖 PCB文件）

8層全志A80BOX高清機頂盒AXT530124+EMMC-BGA169+AXP806原理圖+PCB 8層飛思卡爾I.MX6x智能家居控制主板MAX8903C+WM8962+MT41K128M16JT 6層瑞芯微RK3288平板方案DSN+BRD 6層安霸A7LA30方案行車記錄儀原理圖和PCB文檔 6層Rockchip_Wireless_HDMI_presentation的pcb+原理圖下載 6層HI3531海思最新最全的硬件設計資料整合包含芯片手冊，SCH和PCB 4層使用AM8252B做的帶WiFi-HDMI功能的手機互聯原理圖和PCB 4層海思HI3535網絡硬盤錄像機PBGA563+QFN64+BGA96+原理圖+PCB文件 4層MT7620A智能路由器（小米同款）原理圖和PCB文件分享下載 2層STM32F107智能家居主板IR0038+SPX1117M3-3.3+CH340G+MOC3063原理圖+PCB文件 2層LCD12864萬年歷(帶原理圖和PCB) 2層ESP8266系統板+CH340G+LM1117-V33+原理圖+PCB文件分享下載 16層官方Xilinx Kintex UltraScale FPGA KCU105+4片DDR4分享下載 14層美高森美SmartFusion2 SOC FPGA開發板FT4232H+TPS51200+USB3340+原理圖+PCB 14層高速板sch和brd文件下載 12層altera的5片DDR2組成72數據位寬 10層英特爾x86atom電腦主板BAYTRAIL+ISL95837HRZ-T+RTL8111GS原理圖與PCB文件

標簽： 實用電工

上傳時間： 2013-04-15

上傳用戶：eeworm

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DDR4

DDR4標準 JESD79_4

DDR4板設計及信號完整性驗證的挑戰

4顆DDR4參考PCB

JEDEC_官方標準文檔_JESD79-2F ，涵蓋DDR~DDR4

DDR4 JESD79 標準

全志H6 開發板評估板 CADENCE_ORCAD硬件原理圖+PCB文件

DDR4PCB設計規則

Rockchip RK3328 Datasheet

超實用【2-16層】高速PCB設計案例分享（原理圖 PCB文件）