DRAM       简介       DDR SDRAM       DDR2 SDRAM       DDR3 SDRAM       RLDRAM II       SDR SDRAM     SRAM       简介       QDR I / QDR II       ZBT/Nobl     FPGA       Cyclone III       Cyclone II       Stratix III       Stratix II/Stratix II GX

主页 > 技术中心 > 外部存储器 > RLDRAM II 打印此页 发送此页 Memory Solutions Center: RLDRAM and RLDRAM II Driven predominantly by the needs of networking applications, a new type of DRAM optimized for low-latency access, RLDRAM, was developed. Most DRAM memory types need both a row and column phase on a multiplexed address bus to support full random access. RLDRAM supports a non-multiplexed address, saving bus cycles. The multi-bank architecture in RLDRAM devices allows pipelined accesses. This means the row- and column-line lengths are smaller than in DRAM devices, reducing capacitance and improving access time. RLDRAM utilizes higher operating frequencies and uses the 1.8-V, High-Speed Transceiver Logic (HSTL) standard with DDR data transfer to provide a very high throughput. RLDRAM II offers faster random access times, on-die termination, a delay-locked loop (DLL) for higher frequency operation, larger densities, wider data paths, and higher bus utilization compared with RLDRAM. Altera offers complete system solutions, including technical collateral, software support, intellectual property (IP) cores, demo boards, and simulation models to help you successfully interface Altera® FPGAs with RLDRAM II memories. Table 1 lists RLDRAM II memory interface performance support in Altera FPGAs. Table 1. Altera FPGA RLDRAM II Memory Interface Performance Support Device RLDRAM II Interface Performance Stratix® III 1600 Mbps SIO, 800 Mbps CIO (400 MHz) Stratix II 1200 Mbps SIO, 600 Mbps CIO (300 MHz) Stratix II GX 1200 Mbps SIO, 600 Mbps CIO (300 MHz) HardCopy® II 1000 Mbps SIO, 500 Mbps CIO (250 MHz) Stratix 400 Mbps (200 MHz) Stratix GX 400 Mbps (200 MHz) Technical Documentation Altera offers technical collateral (shown in Table 2) that contains information on device support for RLDRAM II. Table 2. RLDRAM II Technical Documentation Device Handbooks Applicable Device(s) Stratix III Device Handbook: External Memory Interfaces in Stratix III Devices (PDF) chapter Stratix III Stratix II Device Handbook: External Memory Device Interfaces  (PDF) chapter Using Selectable I/O Standards (PDF) chapter Stratix II Stratix/Stratix GX Device Handbook: External Memory Device Interfaces (PDF) chapter Using Selectable I/O Standards (PDF) chapter Stratix/Stratix GX White Papers Applicable Device(s) Selecting the Right High-Speed Memory Technology for Your System (PDF) All User Guides Applicable Device(s) RLDRAM II Controller MegaCore Function User Guide (PDF)  HardCopy II Stratix II/Stratix II GX Application Notes Applicable Device(s) AN 325: Interfacing RLDRAM II With Stratix II, Stratix, and Stratix GX Devices (PDF) Stratix II Stratix/Stratix GX Hardware Test Results Applicable Device(s) Hardware Test Results Stratix Software Support and Tools Altera offers software (shown in Table 3) that aids in the RLDRAM II memory interface design process. Table 3. RLDRAM II Software Support and Tools Feature Applicable Device(s) TimeQuest Timing Analyzer All devices IBIS Models for I/O Buffers Stratix Stratix GX Development Kits and Hardware Reference Platforms Memory hardware reference platforms available from Altera are listed below in Table 4. The Gerber files, layout, termination recommendations, and signal integrity analysis information of these reference platforms are also available. Table 4. RLDRAM II Development Kits and Hardware Reference Platforms Board Name Vendor Contact Information Stratix Memory Reference Platform for DDR and RLDRAM II Altera Contact Altera or local Altera FAE Presentations and Articles Current Altera articles and presentations about RLDRAM II are listed below in Table 5. Table 5. RLDRAM II Articles Articles Type of Resource Applicable Device(s) Altera Offers First FPGA-Based Hardware Reference Platforms for DDR2, RLDRAM II, and QDRII Memories HTML Stratix series FPGAs RDLRAM and RLDRAM II Memory Vendors Micron, Inc. Related Links RLDRAM Home Page Exploring the RLDRAM II Feature Set (PDF)—By Micron External Memory Device Interfaces in Stratix II, Stratix, and Stratix GX Devices External Memory Device Interfaces in Cyclone® II and Cyclone Devices Altera Complete Memory Interface Design Solutions (PDF) Memory Controller IP MegaStoreTM Device Support Center (Signaling and Board Design)   给本页评分   相关链接 NEW! Signal Integrity Center Memory Solution Center Memory Interface Design On-Line Demonstration     注册索取最新邮件通知

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