KSZ8842-PMQL集成電路（IC）的控制器規(guī)格書PDF中文資料

General Description

The KSZ8842-series of 2-port switches includes PCI and non-PCI CPU interfaces, and are available in 8/16-bit and 32-bit bus designs (see Ordering Information). This datasheet describes the KSZ8842M-series of non-PCI CPU interface chips. For information on the KSZ8842 PCI CPU interface switches, refer to the KSZ8842P datasheet.

Features

Switch Management

? Non-blocking switch fabric assures fast packet delivery by utilizing a 1K entry forwarding table

? Fully compliant with IEEE 802.3u 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 (full range of VLAN IDs)

? VLAN ID tag/untag options, on a 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 ports

? Broadcast storm protection

? IEEE 802.1d spanning tree protocol support

? MAC filtering function to filter or forward unknown unicast packets

? Direct forwarding mode enabling the processor to identify the ingress port and to specify the egress port

? Internet Group Management Protocol (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

? MIB counters for fully compliant statistics gathering – 34 MIB counters per port

? Loopback modes for remote failure diagnostics

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

? Remapping 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) allows 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 (see Ordering Information)

? Available in 128-pin PQFP and 100-ball LFBGA (optional package: 128-pin LQFP)

? Available in –16 version for 8/16-bit bus support and – 32 version for 32-bit bus support (see Ordering Information).

Additional Features

In addition to offering all of the features of an integrated Layer-2 managed switch, the KSZ8842M 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 flexible 8, 16, or 32-bit generic host processor interfaces

? Micrel LinkMD? cable diagnostics to determine cable length, diagnose faulty cables, and determine distance-to-fault

? Hewlett Packard (HP) Auto-MDIX 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

? 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