LAN9211 datasheet(110/147 Pages) SMSC

110 / 147 page

High-Performance Small Form Factor Single-Chip Ethernet Controller with HP Auto-MDIX Support

Datasheet

Revision 2.9 (03-01-12)

110

SMSC LAN9211

DATASHEET

Note: By convention, the left most byte of the Ethernet address (in this example 0x12) is the most

significant byte and is transmitted/received first.

5.4.4

HASHH—Multicast Hash Table High Register

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 register contains the lower 32 bits of the hash table.

5.4.5

HASHL—Multicast Hash Table Low Register

This register defines the lower 32-bits of the Multicast Hash Table. Please refer to Table 5.4.4,

"HASHH—Multicast Hash Table High Register" for further details.

Offset:

Attribute:

R/W

Default Value:

00000000h

Size:

32 bits

BITS

DESCRIPTION

31-0

Upper 32 bits of the 64-bit Hash Table

Offset:

Attribute:

R/W

Default Value:

00000000h

Size:

32 bits

BITS

DESCRIPTION

31-0

Lower 32 bits of the 64-bit Hash Table

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