Mobile XDR™ Memory Architecture
The Mobile XDR™ memory architecture is the world’s fastest and most power-efficient memory for mobile applications. Capable of achieving data rates of 3.2 to 4.3 Gigabits per second (Gbps) per pin at an unprecedented power efficiency of 2.2 milliwatts per Gigabit per second (mW/Gbps), Mobile XDR is a complete memory solution ideal for the low-power and high-performance requirements of next-generation smartphones, netbooks, and mobile gaming and multimedia products.
Mobile XDR memory can meet the growing performance demands of future mobile systems driven by applications such as HD video capture and encoding, and 3D gaming. In addition, Mobile XDR memory’s high performance at unmatched power efficiency can deliver extended battery life in next-generation mobile products. Further, the Mobile XDR architecture supports the use of existing manufacturing processes and infrastructure which lowers cost, reduces risk and speeds time to market.
The Mobile XDR memory architecture satisfies the bandwidth requirements of future mobile systems with the fewest number of devices possible. Each Mobile XDR DRAM can deliver delivering 12.8 to 17 GigaBytes per second (GB/s) of bandwidth from a single, 4-byte-wide device.
Enabling a new generation of media-rich mobile products
Consumers will come to expect the High Definition (HD) experience of the living room from the mobile devices they carry everyday.
In addition, they'll want features including HD resolution video recorders, multi-megapixel digital still cameras, 3D games, and media-rich web applications. These advanced mobile devices will be capable of encoding and transmitting high definition content directly to HDTVs, home PCs and servers. To pack all that functionality in a form factor that's thin, light and delivered with a pleasing aesthetic presents a tremendous challenge for mobile device designers. The Mobile XDR memory can meet these challenges with a high-performance memory architecture that meets the power-efficiency constraints of battery-operated products.
Born of the Mobile Memory Initiative
The Mobile XDR memory architecture builds on the foundation of innovations developed as part of Rambus’ Mobile Memory Initiative including:
- Very Low-Swing Differential Signaling (VLSD) - combines the robust signaling qualities of a differential architecture with innovative circuit techniques to greatly reduce active power consumption.
- FlexClocking™ Architecture - a clock-forwarded and clock-distributed topology, enables high-speed operation and a simplified DRAM interface.
- Advanced Power State Management (APSM) - in conjunction with the FlexClocking architecture, provides fast switching times between power-saving modes and delivers optimized power efficiency across a diverse range of usage profiles.
In addition to VLSD, FlexClocking architecture, and APSM, the Mobile XDR architecture features the following Rambus innovations:
- Micro-threading Technology - reduces row and column access granularity resulting in a significant performance benefit for applications dealing with small data objects.
- FlexLink™ C/A - provides the command and address information to a DRAM using a single, differential high speed communications channel.
- Fully Differential Memory Architecture (FDMA) - enables higher speed, lower noise and lower power in high performance memory systems.
- Dynamic Point-to-Point (DPP) - enables memory upgrades and expandable capacity while maintaining high-performance point-to-point signaling.
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