Reference design targets mobile VoWLAN phones running Linux

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Jan. 25, 2005

QuickLogic and Renasas are developing a reference design for mobile VoIP (voice-over-IP) and VoWLAN (voice-over-WLAN) phones running embedded Linux. The RTS7720IPP-DS3 design is based on a Renesas SuperH-DSP SoC (system-on-chip), along with a QuickLogic low-power programmable PCI bridge. It operates under 802.11b/g networks and runs on a Linux-based operating system.

Renesas SH7720

The heart of the RTS7720IPP-DS3 design is a Renesas SH7720, an SoC based on a 133MHz SH3-DSP core, which Renesas says delivers 173 MIPS (millions of instructions per second). The core includes 32KB of cache. On-chip peripherals include a color LCD controller supporting up to 64,000 colors, USB 1.1, I2C, and PCMCIA. The chip includes a hardware acceleration engine for SSL. It targets IP phones, L-mode FAX machines, smartphones, direct printers, and digital home electronics.

QuickLogic QuickPCI bridge

The design also incorporates a low-power programmable PCI bridge from QuickLogic, which can connect the SuperH SoC to any of several third-party 802.11a/b/g modules, QuickLogic says.

The bridge is implemented on one of QuickLogic's QuickPCI "ESPs" (embedded standard products). QuickLogic describes its ESPs as embedded PCI controllers "stitched together with a flexible FPGA (field programmable gate array) on the same piece of silicon."

The QuickPCI bridge also boasts "uWatt" programmable logic technology, which QuickLogic says makes it suitable for battery-powered and handheld systems.

Design contents and availability

The combined Renesas/QuickLogic reference design includes "all the essential elements" for a VoWLAN phone, the companies say, including a keypad, display, voice codecs, and wi-fi module. It will also be supported by a Linux-based operating system. It targets ODMs (original design manufacturers) and OEMs (original equipment manufacturers). No availability date has been set.

QuickLogic has previously partnered with TimeSys on Linux implementations for its reference designs, while Renesas has teamed with MontaVista on previous phone designs.

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