Micrel 2-Port Ethernet Switch

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Home > Featured Products > Volume 2 - Micrel Ethernet Switch

KSZ8842-16MQL and KSZ8842-32MQL – 2-Port Ethernet Switch with Non-PCI Interface

The KSZ8842M is the industry’s first fully managed 2-port ethernet switch with non-PCI CPU interface

Ethernet Switch The KSZ8842M is the Industry’s First 2-Port Ethernet Device that can be directly connected to microprocessors for use in 8- or 16-bit (KSZ8842-16MQL), or 32-bit (KSZ8842-32MQL) Embedded or Industrial Networking applications. The device can be configured as a Layer-2 switch with the third port being connected to the Host Processor port. It may also be configured as a Repeater, for use in latency critical applications, where all packets from one port are immediately broadcast to the remaining 2-ports, thereby bypassing the lookup tables used in a store-and-forward switch architecture. State-of-the-art features such as HP Auto-MDIX, LinkMD™, IPV6 MLD Snooping to handle IPV6 packets and four priority queues have been added to support triple-play Voice, Video and Data applications.

Features

Switch Management
•	Non-blocking switch fabric assures fast packet delivery by utilizing a 1K entry forwarding table
•	Fully compliant to the IEEE 802.3u standard
•	Full-duplex IEEE 802.3x flow control (Pause) with force mode option
•	Half-duplex backpressure flow control

Advanced Switch Management
•	IEEE 802.1q VLAN support for up to 16 groups (full range of VLAN ID)
•	VLAN ID tag/untag options, per port basis
•	IEEE 802.1p/q tag insertion or removal on a per port basis (egress)
•	Programmable rate limiting at the ingress and egress port
•	Broadcast storm protection
•	IEEE 802.1d spanning tree protocol support
•	MAC filtering function to filter or forward unknown unicast packets
•	Unknown MAC address forwarding function
•	Direct forwarding mode enabling the processor to identify the ingress port and to specify the egress port
•	IGMP v1/v2 snooping support for multicast packet filtering
•	IPv6 Multicast Listener Discovery (MLD) Snooping Support

Monitoring
•	Port mirroring/monitoring/sniffing: ingress and/or egress traffic to any port
•	Management information base (MIB) counters for fully compliant statistics gathering: 34 MIB counters per port
•	Loopback modes for remote diagnostic of failure

Comprehensive Register Access
•	Control registers configurable on the fly (port priority, 802.1p/d/q)

QoS/CoS Packets Prioritization Support
•	Per port, 802.1p and DiffServ based
•	Re-mapping of 802.1p priority field on a per port basis

Power Modes, Packaging, and Power Supplies
•	Full-chip hardware power-down (register configuration not saved) provides for low power dissipation
•	Per port-based software power save on PHY (idle link detection, register configuration preserved)
•	Single power supply: 3.3V
•	Commercial Temperature Range: 0ºC to +70ºC
•	Industrial Temperature Range: –40ºC to +85ºC (KSZ8842-16MVLI - Q1 2006)

Markets:
•	Fast Ethernet
•	Embedded Ethernet
•	Industrial Ethernet

Benefits

Offers all of the features of an integrated Layer 2 managed switch plus:
•	Fully compliant to the IEEE 802.3u standard
•	Repeater mode capabilities to allow for ‘cutthru’ in latency critical Industrial Ethernet or Embedded Ethernet applications
•	MAC filtering function to filter unicast packets
•	Dynamic buffer memory scheme – Essential for applications such as Video over IP where image jitter is unacceptable
•	2-Port switch with flexible 8/16/32 bit generic host processor interface
•	Micrel LinkMD™ cable diagnostic capabilities to determine cable length, diagnose faulty cables, and determine fault distance
•	HP Auto MDI-X crossover with disable and enable option
•	Industrial Temperature support: –40ºC to +85ºC available from Q1 2006
•	Four priority queues to handle Voice, Video, Data and Control packets

Applications
•	Industrial applications for daisy chaining multiple devices (e.g. Automatic Test Equipment, IC Mounters, Industrial Equipment, etc.)
•	Industrial control in latency critical for realtime Ethernet (e.g. Motion Control)
•	Industrial control sensor devices (e.g. Temp, Pressure, Levels, Valves, etc)
•	Building Automation (Temperature Sensors, HVAC Controllers)
•	Automotive Equipment
•	Port redundancy and port monitoring
•	Security Cameras
•	Traffic Control
•	Power Plant Monitoring and Control

Consumer Apps:
•	Next Gen IP-STB Applications
•	VoIP Phone and ATA Adaptors

Datasheets
•	KSZ8842M 2-Port Ethernet Switch

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