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Dual-port RAMs enable high-speed interprocessor comms

Posted: 13 Apr 2005 ?? ?Print Version ?Bookmark and Share

Keywords:more battery life? mobl? ram? cypress semiconductor? cypress?

Targeted at mobile phone and PDA applications, the family of five high-performance More Battery Life (MoBL) dual-port RAMs from Cypress Semiconductor Corp. are used to enable high-speed interprocessor communication in next-generation phones that use multiple processors to handle video, games, e-mail or music.

According to the company, the MoBL dual ports provide the industry's lowest operating and standby current that is 80 percent lower than previous generation dual-ports. At 1.8V, operating current is 15mA (typ) and standby current is 2?A (typ), extending both talk and standby times in mobile phones.

Today's mobile phones include advanced feature sets such as the ability to record video, play MP3 music, send multimedia messages and deliver 3D multiplayer games. In order to address these requirements, Cypress said, as well as increased processing demands, many manufacturers have adopted a multi-processor, or modular, architecture for their systems.

Designed with two independent SRAM interfaces, the MoBL dual-port family of devices enables processors to efficiently exchange data. These devices enable communication and application subsystems to evolve independent of each other. Each subsystem can be self-contained with minimal software design effort for interprocessor communication.

"Shorter product life cycles are driving the demand for dual-processor architectures in multimedia mobile platforms: a modular design approach can significantly reduce development time. Our MoBL dual-ports reduce the complexity of wireless handset designs while addressing the increased data throughput and low power consumption requirements," commented Dinesh Ramanathan, Product Marketing Director for Cypress's Data Communications Division.

The new dual-ports support 1.8V, 2.5V and 3V I/O voltage, with densities up to 256Kb. They deliver access times as fast as 35ns and data rates of over 200Mbps per port to avoid data flow bottlenecks. The company also offers a 8bit bus width option to reduce trace route and simplify board layout.

The MoBL Dual-Ports are offered in a 100-ball, 0.5mm pitch, 6-by-6mm fpBGA package. They are already sampling today with full production availability expected in June 2005.

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