IP178C/IP178C LF/IP178CH/IP178CH LF
Datasheet
65/93
June 21, 2007
Copyright © 2004, IC Plus Corp.
IP178Cx-DS-R12
PHY
MII
ROM
R/W
Description
Default
Tag VLAN register 2
TAG_VLAN_MASK_0[8:0].
Tag VLAN 0 output port mask The mask is valid only if MII
register 13.3 TAG_VLAN_EN is logic high and VID index is
4’b0000.
When IP178C/IP178CH receives a packet, it examines the
VID index to choose a tag VLAN mask and forwards the
packets according the MAC address table and the mask.
Bit0
1: port 0 belongs to VLAN 0
0: port 0 doesn’t belong to VLAN 0
Bit1
1: port 1 belongs to VLAN 0
0: port 1 doesn’t belong to VLAN 0
Bit2
1: port 2 belongs to VLAN 0
0: port 2 doesn’t belong to VLAN 0
Bit3
1: port 3 belongs to VLAN 0
0: port 3 doesn’t belong to VLAN 0
Bit4
1: port 4 belongs to VLAN 0
0: port 4 doesn’t belong to VLAN 0
Bit5
1: port 5 belongs to VLAN 0
0: port 5 doesn’t belong to VLAN 0
Bit6
1: port 6 belongs to VLAN 0
0: port 6 doesn’t belong to VLAN 0
Bit7
1: port 7 belongs to VLAN 0
0: port 7 doesn’t belong to VLAN 0
30
14[8:0]
29[0]
28[7:0]
Bit8
1: MII port belongs to VLAN 0
0: MII port doesn’t belong to VLAN 0
9’h1ff
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