AR8327-AL1A-R datasheet(160/394 Pages) ETC2

160 / 394 page

160 • AR8327/AR8327N Seven-port Gigabit Ethernet Switch

Atheros Communications, Inc.

160 • June 2011

COMPANY CONFIDENTIAL

3.6.34

PORT4_PRI_CTRL

Address 0x0694

18:16

R/O

3'h4

PORT_STATE_4

Port State. These bits are used to manage the port to

determine what kind of frames are allowed to enter

or leave the port for simple bridge loop detection or

803.1D Spanning Tree.

3'b000: Disable mode. The port is completely

disable, and can't receive or transmit any frames.

3'b001: Blocking Mode. In this state, the port

forwards received management frames to the

designed port only. Any other frames can't be

transmitted or received by the port, and without

learning any SA address.

3'b010: Listening Mode. In this state, the port will

receive and transmit only management frames, but

without learning any SA address. Any other frames

can't be transmitted or received by the port.

3'b011: Learning Mode. In this state, the port will

learning all SA, and discard all frames except

management frames, and only management frames

allowed to be transmitted out.

3'b100: Forward Mode. In this state, the port will

learning all SA, transmit and receive all frames like

normal.

R/O

RESERVED

14:12

R/O

RESERVED

R/W

RESERVED

R/W

FORCE_PORT_VLA

N_EN_4

1'b1: force to use port base vlan enable. If this bit is

set to 1'b1, use port base vlan & vlan table result to

determine destination port.

9:8

R/W

2'0

VLAN_MODE_4

802.1Q mode for this port.

2'b00: 802.1Q disable. Use port base VLAN only.

2'b01: fallback. Enable 802.1Q for all received

frames. Don't discard ingress membership violation

and use the port base VLAN if the frame's VID isn't

contained in VLAN Table.

2'b10: check. Enable 802.1Q for all received frames.

Don't discard ingress membership violation but

discard frames which VID isn't contained in VLAN

Table.

2'b11: secure. Enable 802.1Q for all received frames.

Discard frames with ingress membership violation

or whose VID isn't contained in the VLAN Table.

R/O

'h6F

RESERVED

6:0

R/W

b00

PORT_VID_MEM_4

Port Base VLAN Member. Each bit restrict which

port can send frames to. To send frames to port0, bit

16 must be set to 1'b1, etc. These bits are set to one

after reset except the port's bit. This prevents frames

going out the port they received in.

Bit

R/W

Inital

Value

Mnemonic

Description

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