SST Launches Next-Generation FlashFlex51 8-bit, 8051 Microcontrollers

11/9/2004 - SST (Silicon Storage Technology, Inc., NASDAQ: SSTI), a leader in flash memory technology, announced the availability of its next-generation FlashFlex51 family of 8-bit, 8051-compatible microcontrollers. The new SST89E/V52RD2/RD, SST89E/V54RD2/RD and SST89E/V58RD2/RD microcontrollers leverage the companyís proprietary SuperFlash technology with a dual-block flash architecture that supports in-application programming (IAP) and features SSTís unique SoftLock security feature. In addition to up to 32 Kbytes of on-chip SuperFlash memory, the new RD2/RD product family offers 1 KByte of on-chip SRAM and fast clock speeds of up to 40 MHz. The low-cost RD2/RD microcontrollers provide customers with an ideal solution for developing microcontroller-based application specific products for high-volume applications in industrial, PC, digital consumer, wireless and networking markets.

The unique architecture of the RD2/RD enables users to map the flash memory into two independent blocks. The primary memory block-0 is comprised of 8 KBytes (SST89E/V52RD2/RD), 16 KBytes (SST89E/V54RD2/RD) or 32 KBytes (SST89E/V58RD2/RD) of SuperFlash EEPROM with a 128-Byte sector size, and occupies the internal ROM space for an 8051-compatible microcontroller. The secondary memory block-1 housing 8 Kbytes of SuperFlash EEPROM, also with a 128-Byte sector size, can be used as either electronically erasable nonvolatile data or code storage. The RD2/RD microcontrollers can be reprogrammed from a single-voltage 3-volt or 5-volt power supply.

ďOur RD2/RD family provides users with a low-cost, dual-bank flash microcontroller, that is ideal for high-volume applications,Ē said Paul Lui, Vice President of Special Product Group, SST. ďWith densities ranging from 8 to 32 KBytes, we believe there is no other cost-effective flash microcontroller available today that specifically addresses all the needs of industrial, PC, networking and Internet-enabled applications.Ē

Flexible Reprogrammability Through IAP
Like all of SST's FlashFlex51 microcontrollers, the dual-memory block architecture of the RD2/RD series supports IAP. The IAP mode allows the CPU to run user programs from one flash memory block, while servicing a flash programming operation in the background on the other block concurrently, thereby allowing the flash contents to be altered while the CPU continues to run the application software. IAP lowers cost and improves time-to-market for manufacturers, while bringing enhanced user experiences and convenience to consumers. IAP will also have a significant role in enabling increased functionality, such as remote diagnostics and product monitoring, in network- or Internet-enabled devices.

In addition to IAP, the RD2/RD microcontroller also features SSTís innovative memory remap feature. Memory remap enables the boot-strap loader in memory block-1 to be run at the onset of every MCU reset. This allows users to remap the secondary memory block-1 physical address to overlay the lower order logical address so that interrupts can be serviced when the primary memory block-0 is busy under program/erase operation.

SoftLock Security Protection
The RD2/RD series of microcontrollers also include SSTís proprietary SoftLock security features. SoftLock is a special security protection mode that prevents both accidental overwriting of program memory and software piracy, while still enabling IAP operation under the secured environment. SST's SoftLock mode contains a four-level security lock scheme, thereby increasing the versatility of the flash memory partition between the two memory blocks.

RD2/RD Series Development Tools
The RD2/RD series of microcontrollers are fully supported by industry-standard development tools, including software, programmers and in-circuit emulators. SST also provides its own proprietary development tools and software utilities, including an in-system programming boot-strap loader and a software-based emulator.

SSTís FlashFlex51 microcontroller family enables a seamless transition of 8051 designs from development to pre-production to high-volume manufacturing without the need to re-design and re-qualify at every cycle. Because of SST's SuperFlash technology, the FlashFlex51 microcontrollers enable faster time-to-market of system designs without the high risks and costs normally associated with the traditional approach of converting designs from windowed EPROMs to one-time programmable (OTP) to mask-ROM versions.

Pricing and Availability
Samples of the RD2/RD microcontrollers are available now. SST expects production quantities to be available by the end of Q4. The SST89E52RD2-40-C-NJ is priced at $1.20 each, the SST89E54RD2-40-C-NJ is priced at $1.38 each and the SST89E58RD2-40-C-NJ is priced at $1.55 each, all in quantities of 10K. For additional information, visit SSTís Web site at

About SuperFlash Technology
SST's SuperFlash technology is a NOR type, split-gate cell architecture which uses a reliable thick-oxide process with fewer manufacturing steps resulting in a low-cost, nonvolatile memory solution with excellent data retention and higher reliability. The split-gate NOR SuperFlash architecture facilitates a simple and flexible design suitable for high performance, high reliability, small or medium sector size, in- or off-system programming and a variety of densities, all in a single CMOS-compatible technology.

About Silicon Storage Technology, Inc.
Headquartered in Sunnyvale, California, SST designs, manufactures and markets a diversified range of nonvolatile memory solutions, based on proprietary, patented SuperFlash technology, for high volume applications in the digital consumer, networking, wireless communications and Internet computing markets. SST's product families include various densities of high functionality flash memory components, flash mass storage products and flash microcontrollers. SST also offers its SuperFlash technology for embedded applications through its world-class manufacturing partners and technology licensees including 1st Silicon (Malaysia) Sdn. Bhd., Grace Semiconductor Manufacturing Corporation (Grace), IBM, Motorola, Inc., National Semiconductor Corporation, NEC Corporation, Oki Electric Industry Co. Ltd., Samsung Electronics Co. Ltd., SANYO Electric Co., Ltd., Seiko Epson Corp., Shanghai Hua Hong NEC Electronics Co., Ltd., Taiwan Semiconductor Manufacturing Co. Ltd. (TSMC), Toshiba Corporation, Vanguard International Semiconductor Corporation, and Winbond Electronics Corp. TSMC offers embedded SuperFlash under its trademark Emb-FLASH. Further information on SST can be found on the company's Web site at

The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc. Emb-FLASH is a trademark of TSMC.

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