Datasheet KSZ8842-PMQL, KSZ8842-PMBL (Microchip) - 2

Micrel, Inc. Features
Switch Management
• Non-blocking switch fabric assures fast packet delivery
by utilizing a 1K entry MAC Address look-up engine and
a store-and-forward architecture
• Fully compliant with IEEE802.3u standards
• Full-duplex IEEE 802.3x flow control (Pause) with force
mode option
• Half-duplex back pressure flow control Advanced Switch Management
• IEEE 802.1Q VLAN support for up to 16 groups (fullrange of VLAN IDs)
• 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 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: 32 MIB counters per port
• Loop back modes for remote failure diagnostics Comprehensive Register Access
• There are three kinds of register groups:
• The PCI configuration registers are used to initialize
and configure the PCI interface
• The PCI control/status registers are used to
communicate between the host and KSZ8842PMQL/PMBL
• Switch registers are used to support transceiver control
and status. They are configurable on-the-fly (portpriority, 802.1p/d/Q, etc.) QoS/CoS Packets Prioritization Support KSZ8842-PMQL/PMBL 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: 0°C to +70°C
• Industrial Temperature Range: –40°C to +85°C
• Available in 128-pin PQFP and 100-ball LFBGA Additional Features
In addition to offering all of the features of an integrated
Layer-2 managed switch, the KSZ8842-PMQL/PMBL
offers:
• Repeater mode capabilities to allow for cut through in
latency critical Industrial Ethernet or Embedded
Ethernet applications
• Dynamic buffer memory scheme essential for
applications such as Video over IP where image jitter is
unacceptable
• 2-Port switch with a 32-bit/33MHz PCI processor
interface.
®
• Micrel LinkMD cable diagnostics to determine cable
length, diagnose faulty cables, and determine distanceto-fault
• Hewlett Packard (HP) Auto MDI-X crossover with
disable and enable options
• Four priority queues to handle voice, video, data, and
control packets
• Ability to transmit and receive jumbo frame sizes up to
1916 bytes Applications
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• Video Distribution Systems
High-end Cable, Satellite, and IP set-top boxes
Video over IP
Voice over IP (VoIP) and Analog Telephone Adapters
(ATA)
Industrial Control in Latency Critical Applications
Motion Control
Industrial Control Sensor Devices (Temperature,
Pressure, Levels, and Valves)
Security and Surveillance Cameras Markets
• Fast Ethernet
• Embedded Ethernet
• Industrial Ethernet • Per port, 802.1p and DiffServ based
• Re-mapping of 802.1p priority field on a per port basis October 2007 2 M9999-100207-1.5