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All-in-OneMemory packs NOR, NAND, RAM

Posted: 01 Jun 2007 ?? ?Print Version ?Bookmark and Share

Keywords:All-in-OneMemory? embedded SuperFlash NOR blocks? NAND flash management?

Silicon Storage Technology Inc. (SST) is offering a memory subsystem that blends key benefits of NOR, NAND and RAM in a unified architecture. The All-in-OneMemory offers multigigabytes of execute-in-place code storage to meet the growing data storage needs of embedded applications like multimedia handsets, PMPs and digital still/video cameras.

A resident 32bit MCU manages all of a system's key memory components. The subsystem comes in a single package, simplifying the host interface, shortening design time, reducing overall system costs and improving quality and reliability, SST said.

The All-in-OneMemory consists of a memory controller with built-in user NOR, NAND flash and RAM. The memory controller features embedded SuperFlash NOR blocks for boot code, a flash file system for NAND flash management and a cache memory controller for pseudo NOR, which emulates high-density NOR flash.

The RAM block is divided into two user-configured sections with direct access from the host. The blocks include a cache partition for pseudo NOR and a system RAM partition for the host.

The NAND flash block is used as nonvolatile storage for the pseudo-NOR area and memory-mapped ATA NAND disk area. Using RAM and NAND to emulate high-density NOR, the expandable pseudo-NOR block can replace a costly high-density NOR device.

The managed All-in-OneMemory subsystem offers instant secure boot, memory demand paging, NAND flash management and a standard ATA data storage protocol in a small-footprint package. The first SST products using All-in-OneMemory technology will be available in the second half.

- Ismini Scouras

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