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Energy-efficient switches support IEEE 1588v2

Posted: 08 Sep 2011     Print Version  Bookmark and Share

Keywords:Ethernet device  switch ic  Ethernet platform 

Micrel Inc. debuts the KSZ84xx family of IEEE 1588v2-enabled Ethernet devices that integrate IEEE 1588v2 distributed synchronisation, Ethernet switching, and Precision GPIO in an energy efficient, compact package targeted at Industrial Ethernet and Power Substation Automation applications.

The KSZ84xx platform employing Micrel's EtherSynch technology is a compact, highly integrated, and energy efficient IEEE 1588v2 10/100 switch, supporting both centralised and distributed network topologies. A full complement of Precise Timing Protocol timing modes are provided, including the Transparent Clock (TC) introduced in IEEE 1588v2, along with a range of host interfaces capable of interfacing to a wide range of CPUs.

The KSZ84xx switches are applicable for distributed network topologies which are preferred for Industrial Ethernet networks. The ICs feature a hardware-oriented architecture that reduces the synchronisation and communications processing demands on the Host CPU. Such features as Source Addressing, One-Step TC corrections, and Bypass mode facilitate both Ring and Linear topologies. By integrating the IEEE 1588 PTPv2 time stamping as close to the physical layer as possible, sub-100ns synchronisation performance has been demonstrated.

The KSZ84xx product family consists of: 1) KSZ8463: IEEE 1588v2, 3-port switch with MII/RMII interface; 2) KSX8462: IEEE 1588v2, 3-port switch with generic host interface; and 3) KSX8441: IEEE 1588v2, Controller with generic host interface.

Micrel also intends to offer a pre-qualified Precise Timing Protocol software stack, which has been integrated with the driver and optimised to exploit the KSZ84xx architecture. Source code is available under licence.

The KSZ84xx reduces operational power consumption, which is less than 300mW. Power management features complement the inherently low-power Physical Layer design, including Energy Efficient Ethernet (EEE-IEEE 802.3az), Wake on LAN (WoL), Energy Detect Power Down (EDPD), and software power down. Standby power savings of over 95 per cent are achievable, promising the lowest power, most energy-efficient IEEE 1588v2/Ethernet solution available.

The ICs are currently sampling with volume production expected in the first quarter of 2012.





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