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Ethernet controller boasts higher throughput

Posted: 29 Jul 2008 ?? ?Print Version ?Bookmark and Share

Keywords:Ethernet controller? SPI? single-port chip?

From Micrel Inc. comes the KSZ8851, a single-port embedded controller chip with 8/16/32-bit and SPI host interfaces. The high throughput device is pin compatible with Micrel's KSZ8841 and KSZ8842 product families and ideal for a wide variety of Ethernet applications in the IPSTB, VoIP, and industrial Ethernet markets. The device will be available in production quantities in Q3 08, and is priced at $4.00 for 1,000 quantities.

"With more than 250 million ports shipped since 1999, Ethernet continues to require higher and higher throughput devices," noted Richard Bowers, Micrel's director of marketing for Ethernet. "Micrel's new KSZ8851 gives existing customers the industry's highest throughput embedded controller that also features Industry support for SPI interface (32-pin QFN) and a small package option for generic bus interface (48-pin LQFP)."

The KSZ8851 integrates a Fast Ethernet MAC/PHY with an 8/16/32-bit generic host processor interface and SPI interface. The device has 18Kbit of internal buffer memory shared between the RXQ and TXQ. The buffer memory on the receive queue is 12Kbit, while the buffer memory for the transmit queue is 6Kbit. Pin compatible with Micrel's existing KSZ8841MQL and KSZ8842MQL families, the device offers performance at 80Mbps or higher. The solution supports both Big-Endian and Little-Endian processors as well as IPv4/IPv6 checksum generation and checking. These features greatly reduce CPU usage and improve overall system performance. The KSZ8851 also gives designers an enhanced power management feature with energy detect mode, programmable IO options of 3.3V/2.5V/1.8V and an industrial temperature range of -40C to +85C. Finally, the device comes in a variety of package options including 128-pin PQFP, 48-pin LQFP and 32-pin QFN.





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