LAN9500AI datasheet(164/213 Pages) MICROCHIP

Nome de Peças	LAN9500AI

Descrição Electrónicos	LAN950x USB 2.0 to 10/100 Ethernet Controller

PDF	213 Pages

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Fabricante Electrônico	MICROCHIP [Microchip Technology]

Página de início	http://www.microchip.com

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164 / 213 page

LAN950x

DS00001875A-page 164

 2010 - 2015 Microchip Technology Inc.

7.4.4

MULTICAST HASH TABLE HIGH REGISTER (HASHH)

The 64-bit Multicast table is used for group address filtering. For hash filtering, the contents of the destination address

in the incoming frame is used to index the contents of the Hash table. The most significant bit determines the register

to be used (Hi/Low), while the other five bits determine the bit within the register. A value of 00000 selects Bit 0 of the

Multicast Hash Table Lo register and a value of 11111 selects the Bit 31 of the Multicast Hash Table Hi register.

If the corresponding bit is 1, then the multicast frame is accepted. Otherwise, it is rejected. If the “Pass All Multicast” (MCPAS)

bit is set (1), then all multicast frames are accepted regardless of the multicast hash values.

The Multicast Hash Table Hi register contains the higher 32 bits of the hash table and the Multicast Hash Table Low

Address:

10Ch

Size:

32 bits

Bits

Description

Type

Default

31:0

Upper 32 bits of the 64-bit Hash Table

R/W

0000_0000h

LAN9500AI Folha de dados(PDF) 164 Page - Microchip Technology