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VoIP-optimized home gateway design runs Linux
Oct. 09, 2006

Infineon is shipping a Linux-based hardware/software reference design for integrated access devices (IADs). The ADSL2+ Residential Gateway (RG) design is based on an Infineon MIPS32 SoC (system-on-chip) with integrated VoIP (voice-over-IP) co-processor and ADSL2/2+ transceiver. The design also offers 802.11n connectivity and a DECT (digital enhanced cordless telecommunications) base station.

Infineon's Residential Gateway design comprises:
  • Danube -- A highly integrated SoC (system-on-chip) based on a 32-bit 24KEc MIPS core, and integrating a VoIP co-processor, two integrated codecs, an 8/16-bit NOR/NAND controller, and an ADSL2/2+ (asymmetric digital subscriber line) transceiver supporting data rates up to 24Mbps. I/O includes USB 2.0, two Ethernet interfaces, SPI with DMA, serial UART with hardware flow control, JTAG/EJTAG, and 32 general purpose I/Os.

  • DECT Step 8 -- Infineon's DECT subsystem

  • WLAN 802.11n -- Based on the already voted down draft 1.0 release of the embattled 802.11n standard, the design's WiFi subsystem is theoretically capable of throughputs up to 150 or 180 Mbits/sec., and can increase both throughput and range for legacy 802.11g and 802.11a/g products, Infineon says.

  • Infineon's "Spinacer" Linux stack -- A modular Linux implementation that supports a range of Infineon chips, Spinacer aims for low memory requirements and maximum flexibility, Infineon says.

Components of Infineon's Spinacer Linux stack
(Click to enlarge)

Alex Green, Infineon research director, stated, "Having a turnkey reference design frees system manufacturers from dealing with basic technology integration, and allows them to focus on product customization and feature set."

The market for residential IADs will grow at 26 percent annually over the next four years, growing from from six to 20 million units by 2010, according to IMS Research figures cited by Infineon.



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