STMicroelectronics Introduces 4-Mbit Flash System Memory for DSPs.Business Editors GENEVA--(BUSINESS WIRE)--April 26, 2002 STMicroelectronics (NYSE NYSE See: New York Stock Exchange : STM (Scanning Tunneling Microscope) A microscope that can image down to the atomic level. An STM uses a piezoelectric tube with a tiny sharp tip at the end that is moved within nanometers of the object being sampled. ) has introduced its third DSP System Memory (DSM 1. DSM - Data Structure Manager. An object-oriented language by J.E. Rumbaugh and M.E. Loomis of GE, similar to C++. It is used in implementation of CAD/CAE software. DSM is written in DSM and C and produces C as output. ) product. The 4-Mbit Flash DSM2150F5 provides an in-system-programmable, turnkey system-memory solution for digital signal processors (DSPs). In particular, the family is designed specifically to support Analog Devices' ADSP-2153x family of DSPs, but also supports their other general-purpose 16-bit and 32-bit DSP families. The DSM2150F5 provides two independent Flash memory arrays of 512 Kbytes and 32 Kbytes, an integrated programmable logic device See PLD. (PLD) array with over 3,000 gates and 16 macrocells, and up to 40 multifunction I/O pins. By integrating Flash memory, programmable logic, and I/O ports, the DSM2150F5 connects directly and without additional logic to the DSP to form a simple, flexible two-chip subsystem on which to build DSP-based products for a wide range of applications. The DSM2150F5 provides in-system programmability (ISP) via its JTAG (Joint Test Action Group) An IEEE standard for boundary scan technology. See scan technology. JTAG - Joint Test Action Group ISP port. In this way, the DSM2150F5 cuts development time, eliminates the need for socket-mounted pre-programmed memory and logic devices, paves the way for efficient just-in-time manufacturing, and simplifies product manufacturing, testing, and field updates. The entire device (memory and configuration) can be programmed in 15-35 seconds via JTAG, with no involvement of the DSP. In addition, the DSM2150F5's JTAG port can be connected to the JTAG debug port of the DSP for fast code iterations on the bench. Designers configure the DSM2150F5 in place using PSDsoft Express, an easy-to-use, point-and-click development tool available free of charge at ST's web site (www.st.com/psd). While the large 512 Kbyte main Flash memory is ample storage for code and data tables to be boot loaded into DSP SRAM See static RAM. SRAM - static random-access memory , the smaller sector size of the secondary 32 Kbyte Flash memory is ideal for storing small data sets and calibration constants, thus eliminating the need for an external EEPROM (Electrically Erasable Programmable ROM) A rewritable memory chip that holds its content without power. Although EEPROMs spawned flash memory, EEPROMs are byte addressable at the write level, whereas flash chips must erase a block of bytes before rewriting. . The secondary Flash array can also be used to store custom start-up code which can be used in lieu of the internal DSP boot ROM allowing total flexibility. For example, the custom start-up code can be used to update the DSP internal SRAM via USB USB in full Universal Serial Bus Type of serial bus that allows peripheral devices (disks, modems, printers, digitizers, data gloves, etc.) to be easily connected to a computer. in the field--an action that is not possible using the internal DSP boot ROM. The DSM2150F5's 3,000 gate PLD can map any memory segment to any address allowing total flexibility. It also has 16 macrocells that can be used to implement any miscellaneous glue logic, eliminating the need for external PALs, PLDs, and 74-series logic for interfacing to keypads and displays, for example. The DSM2150F5's 40 multifunction configurable I/O pins enhance the DSP's I/O resources, increasing the number of peripherals that can be controlled without adding interface chips or increasing the host processor's workload. Either the DSP software or the DSM2150F5's own PLD logic can drive the state of individual I/O pins. The DSM2150F5's Flash memory features a 120ns access time, 100,000-program-erase-cycle endurance, and 15-year data retention. The DSM2150F5 operates from 3.3V +/- 10% over a temperature range of -40(degree) to +85(degree)C. It comes in an 80-pin TQFP See QFP. (DSM2150F5V-12T6) package. Devices are available in volume production. A separate FlashLINK(TM) JTAG cable for programming the DSM2150F5, which plugs into a PC's parallel port, is also available. Further information on this device is available at www.st.com/psd. About STMicroelectronics STMicroelectronics, the world's third largest independent semiconductor company, is a global leader in developing and delivering semiconductor solutions across the spectrum of microelectronics applications. An unrivalled combination of silicon and system expertise, manufacturing strength, Intellectual Property (IP) portfolio and strategic partners positions the Company at the forefront of System-on-Chip (SoC) technology and its products play a key role in enabling today's convergence markets. The Company's shares are traded on the New York Stock Exchange New York Stock Exchange (NYSE) World's largest marketplace for securities. The exchange began as an informal meeting of 24 men in 1792 on what is now Wall Street in New York City. , on Euronext Paris and on the Milan Stock Exchange Milan Stock Exchange The largest regional stock exchange in Italy, facilitating more than 90% of the country's trading volume. . In 2001, the Company's net revenues were $6.36 billion and net earnings were $257.1 million. Further information on ST can be found at www.st.com. |
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