AR8327-AL1A-R datasheet(127/394 Pages) ETC2

127 / 394 page

Atheros Communications, Inc.

AR8327/AR8327N Seven-port Gigabit Ethernet

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Table 3-110.

ATU_FUNC_REG Register

Bit

R/W

Inital

Value

Mnemonic

Description

R/W SC

AT_BUSY

DEPEND: AT_DONE, Address table busy. This

bit must be set to 1'b1 to start an AT operation

and cleared to zero by hardware after the

operation is done. If this bit is 1'b1 on read, cpu

can't request another operation.

30:25

R/O

RESERVED

24:22

R/W

TRUNK_PORT_NUM

TRUNK port number. When CPU function is

"CHANGE TRUNK PORT", the AT_PORT_NUM

in arl bitmap will be changed to

TRUNK_PORT_NUM.

R/O

RESERVED

20:16

R/W

ATU_INDEX

If ATU_TYPE is reserved ATU Entry, this index is

the address of Reserved ATU entry

R/W

AT_VID_EN

1'b1: when CPU function is "GET NEXT", the vid

in the valid ARL entry must be equal to the vid

we set

R/W

AT_PORT_EN

1'b1: when CPU function is "GET NEXT", the

AT_PORT_NUM must be in the Destination port

in the valid ARL entry.

R/W

AT_MULTI_EN

1'b1: when CPU function is "GET NEXT", the

high bytes of mac address in the valid ARL entry

must be 0x01005E or 0x3333.

1'b0: all enty

R/W

AT_FULL_VIO

ARL table full violation. This bit is set to 1'b1 if

the ARL table is full when cpu want to add a new

entry to ARL table, and also be set to 1'b1 if the

ARL table is empty when cpu want to purge an

entry to ARL table.

11:8

R/W

AT_PORT_NUM

Port number to be flushed. If "AT_FUNC" is set

to 4'b0101, lookup module must flush all unicast

entries for the port.(or flush the port from ARL

table)

7:6

R/O

RESERVED

R/W

ATU_TYPE

1'b1:Reserved ATU Entry

1'b0: Normal ATU Entry.

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