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Fast Ethernet controller boosts IP video streaming

Posted: 15 Apr 2008 ?? ?Print Version ?Bookmark and Share

Keywords:Fast Ethernet? IP controller? video streaming?

Teridian Semiconductor Corp. has started to sample the 78Q8430 10/100 Fast Ethernet multimedia offload controller for video streaming and mixed media (data, voice and VoIP) applications.

The 78Q8430 targets Ethernet applications requiring reliable connectivity and quality of service levels such as industrial networking, STB, DTV and other consumer broadband or A/V equipment.

According to the company, the 78Q8430 enables designers to use more of their host processor MIPS for important system level functionality such as image/audio processing, format conversion and encoding/decoding tasks by offloading many of the communications processing tasks to the controller.

The Teridian 78Q8430 is a 10/100BASE-TX controller that seamlessly interfaces to non-PCI processors through a simplified pseudo SRAM-like Host Bus Interface supporting 32/16/8bit data bus widths. It provides support for IEEE802.3x flow control and compliance with IEEE802.3 and 802.3u standards and employs a unique management scheme for the integrated 32Kbyte SRAM FIFO memory to adaptively allocate memory, depending on the data stream load and direction all without host or software driver intervention for reduced host MIPS requirements and lower packet latency.

In addition, the flexible packet classification engine supports up to 128 user configurable rules and by default comes configured with 8 unicast (or perfect) IP address filtering ability, and can be configured for wildcard address filtering, positive/negative filtering, promiscuous mode operation, as well as multicast and broadcast mode operation. Other offload functionality includes 64Kbyte JUMBO packet support, IP Checksum calculation, check/generate/strip/append CRC's, four levels of transmit priority queuing, and the ability to drop frames based on source IP address.

Pricing is less than $3 in volume production quantities. Commercial temperature-grade samples of the 78Q8430, as well as evaluation kits for ST OS/20 and Linux 2.6.x (for ARM920T) are available now, with production volumes expected later this quarter. Industrial temperature grade samples will be available the following quarter.

- Ismini Scouras

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