AX88796ALF datasheet(23/68 Pages) ASIX

23 / 68 page

AX88796ALF

3-in-1 Local Bus Fast Ethernet Controller

4.1.3 Broadcast Address Match Filter

The Broadcast check logic compares the Destination Address Field (first 6 bytes of the received packet) to all 1’s, which is

the values are “FF FF FF FF FF FF FF” in Hex format. If any bit of the six bytes does not equal to 1’s, the Protocol Control

Logic rejects the packet.

4.1.4 Aggregate Address Filter with Receive Configuration Setup

The final address filter decision depends on the destination address types, identified by the above 3 address

match filters, and the setup of parameters of Receive Configuration Register.

Definitions of address match filter result are as following:

Signal

Value

Description

Phy

Unicast Address Match

Unicast Address not Match

Mul

Multicast Address Match

Multicast Address not Match

Bro

Broadcast Address Match

Broadcast Address not Match

AGG

Aggregate Address Match

Aggregate Address not Match

The meaning of AB, AM and PRO signals, please refer to “Receive Configuration Register”

Aggregate Address Filter function will be:

AGG

Bro

/Bro

/Mul

PRO

/Bro

Mul

Phy

AND

Logic

AND

Logic

AND

Logic

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