TNETX3151PGV datasheet(2/65 Pages) TI1

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TNETX3151

ThunderSWITCH

™ 12/3 ETHERNET™ SWITCH

WITH 12 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS

SPWS048A – MARCH 1998 – REVISED APRIL 1999

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

description

The TNETX3151 provides highly integrated switching solutions that allow network designers to lower overall

system costs. Based on Texas Instruments (TI

™) ThunderSWITCH™ architecture, the TNETX3151 design

integrates 12 full-duplex 10-Mbit/s ports and 3 full-duplex 10-/100-Mbit/s ports, as well as an address-lookup

engine, all in a single 240-pin package. All ports on the TNETX3151 are designed to support multiple addresses,

cut-through or store-and-forward modes of operation, and VLAN. The 10-/100-Mbit/s ports have

media-independent interface (MII)-compatible interfaces and can be configured to work as MII uplinks to

high-speed switching fabrics. All three of the 10-/100-Mbit/s ports can be logically combined into a single

high-performance uplink channel that can be used to provide up to 600-Mbit/s switch-to-switch connections.

The TNETX3151 incorporates an internal content-addressable memory (CAM) capable of supporting 2,048 end

stations from a single switch. In addition, the device supports 32 user-configurable VLAN-broadcast domains

(IEEE Std 802.1Q), which allows IEEE Std 802.1P priority support interoperability, IEEE Std 802.3X full-duplex

flow control, and a collision-based flow-control scheme. The TNETX3151 also integrates an EEPROM interface

that allows the device to be initialized and configured without the added expense of a CPU. All of these features

on chip greatly reduce the number of external components required to build a switch.

The internal address-lookup engine (IALE) supports up to 2K unicast/multicast and broadcast addresses and

up to 32 IEEE Std 802.1Q VLANs. For interoperability, each port can be programmed as an access port or

non-access port to recognize VLAN tags and transmit frames with VLAN tags to other systems that support

VLAN tagging. The IALE performs destination- and source-address comparisons and forwards unknown

source- and destination-address packets to ports specified via programmable masks.

TNETX3151PGV 数据表(PDF) 2 Page - Texas Instruments