General Description

The KSZ8842-series of 2-port switches includes PCI and non-PCI CPU interfaces. This datasheet describes the KSZ8842-PMQL/PMBL PCI CPU interface chips. KSZ8842-PMQL is PQFP package chip, KSZ8842-PMBL is LFBGA package chip. For information on the KSZ8842-MQL/MBL CPU non-PCI interface switches, refer to the KSZ8842-MQL/MBL datasheet.

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 KSZ8842- PMQL/PMBL

• Switch registers are used to support transceiver control and status. They are configurable on-the-fly (portpriority, 802.1p/d/Q, etc.)

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Applications

• 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