TNETX15VE datasheet(106/113 Pages) TI1

Nome de Peças	TNETX15VE

Descrição Electrónicos	VLAN-ENGINE ADDRESS-LOOKUP DEVICE

PDF	113 Pages

Scroll/Zoom	100%

Fabricante Electrônico	TI1 [Texas Instruments]

Página de início	http://www.ti.com

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TNETX15VE

VLAN-ENGINE ADDRESS-LOOKUP DEVICE

SPWS028B – APRIL 1997 – REVISED SEPTEMBER 1997

106

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

APPLICATION INFORMATION

VLAN support for proprietary systems

In a third-party application the pretag can be used to transfer the VLANID for frames that are sourced by the

system to the TNETX3150/TNETX3150A and eventually to the TNETX15VE. Since the pretag is used as an

offset in the tagVLAN registers, they must be configured one-to-one so that the tagVLAN offset agrees

one-to-one with the VLANID.

The current TNETX15VE implements two bits of VLANID (four possible VLANs), where the pretag field (which

is used to index into the tagVLAN array) is four bits. As the designer is deciding on the pretag bit fields, and the

entries for the tagVLAN array for translation into VLANids for the inbound packets, there are multiple array

entries that can be used in this version of the TNETX15VE. TagVLAN0 to tagVLAN3 is recommended as future

versions can be equipped with four bits of VLANid.

TNETX15VE Folha de dados(PDF) 106 Page - Texas Instruments