W.F.Rakecky: Here are a couple "past" news releases from TXN which may or may not answer your question on the DSP.
You may want to check around the Cirrus Logic website since they too were licensed by USR for x2.
I myself don't believe USR had anything to do with the chip other than owning the code and the x2 scheme. There may have been some agreement where TXN would only sell the particular DSPs for x2 use, over some agreed upon time frame.
The link to TXN search area is at the bottom here, you may want to look at the DSP # and how & who TXN would sell them to.
SKOKIE, Ill. -- (May 12, 1997) -- U.S. Robotics (NASDAQ:USRX) and Texas Instruments (NYSE: TXN) announced a strategic initiative to deliver a family of affordable and upgradeable "hybrid" modems supporting both dial-up access, including U.S. Robotics' x2 56 Kbps analog, and rate adaptive Asymmetric Digital Subscriber Line (ADSL). The product family will be called x2/DSL and will run on Texas Instruments' industry performance leading TMS320C6x digital signal processing (DSP) platform. Capable of processing 1.6 billion instructions per second, the 'C6x has the processing power to implement the x2/DSL. U.S. Robotics plans to introduce x2/DSL modems in the first half of 1998.
U.S. Robotics' Advanced Development Group will develop DSP software for x2/DSL and incorporate DMT algorithms for ADSL modulation recently licensed from Aware, Inc. as well x2 56K algorithms developed by U.S. Robotics.
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TI DSP Chipset Backs Early Delivery of New USR High-Speed Modems Chipsets already in full production
HOUSTON, TEXAS (October 16, 1996) -- Texas Instruments (TI), the industry leader in digital signal processing (DSP) solutions, announced the immediate availability of modem chipsets compliant with 56 kilobits-per-second (kbps) "x2" technology from U.S. Robotics Corp. (USR, Chicago, Illinois). TI's chipset platform for the new 56 kbps modems gives modem makers a distinct competitive advantage by providing a proven chipset that is currently in full production, and facilitates a flexible software modem solution based on a software programmable digital signal processor (DSP) chip.
Because this new technology is based on existing modem chipset architectures, TI will make x2 technology available by the end of this year. Nearly 20 million modems using TI chipsets have been in mass production since 1995. This ability to swiftly deploy a new, state-of-the-art communications technique to end users exemplifies the advantage TI's software-programmable modem chipsets brings to modem manufacturers.
"The promise of 56 kilobit modems certainly represents one of the biggest Internet connectivity breakthroughs in history," said Mike Hames, vice president Semiconductor Group and worldwide manager of DSP at TI. The new 56 kbps x2 technology uses traditional telephone lines to allow Internet and on-line services users to download text, image, and video data at twice the speed of today's 28.8 kbps modems.
"Any kind of 56 kbps connectivity requires identical protocols both in the user's modem and at the Internet service providers [ISPs] where reprogrammable USR modems are already widely installed," continued Hames. "This alone will make x2 an automatic de facto standard for Internet access equipment." Any modem product designed using the TI chipsets, including PC modem cards, external PC modems, and Internet access equipment, will be compatible with x2.
TI's operating-system-independent, and Windows(TM)-based modem chipsets are built around one of the company's TMS320 DSP cores. This lets modem product designers easily upgrade end equipment with new technology through software reprogrammability both at the host level and at the DSP level, protecting end users against hardware obsolescence.
According to Casey Cowell, chairman, CEO, and president of U.S. Robotics, "USR has long depended on programmable TI DSP solutions to give our modems significant performance advantages, and we are pleased to be working with Texas Instruments to bring this new technology to market. Based on TI's leading DSP technology, we will be able to upgrade many of our existing modem architectures without any hardware changes. This flexibility is key in bringing x2 to market quickly."
TI has emerged as a clear leader in providing modem chipsets to end-equipment vendors. For example, TI was first-to-market with modem chipsets supporting 33.6 kilobit-per-second cohttp://www.ti.com/sc/docs/dsps/products/data/x2news.htmnnection speeds, and to date, nearly 20 million V.34 modems have shipped using TI DSP chipsets. Advanced, DSP-based handshaking techniques let TI-based modems connect over a highly unpredictable assortment of line conditions throughout the worldwide telecom infrastructure. The new x2 modems are based on these same chipsets and are already in trial use at 56,000 bits-per-second at selected ISP sites.
ti.com |
