RTL8305SC
Datasheet
5-port 10/100Mbps Single-Chip Dual MII Switch Controller
40
Track ID: JATR-1076-21 Rev. 1.2
6.4.3.
Port 3 Control 1
Table 38. Port 3 Control 1
Name
Byte.bit
Description
Default
Reserved
55.7
1
Internal Use
55.6
0
Local loopback
55.5
1: Perform ‘local loopback’, i.e. loopback MAC’s RX back to TX
0: Normal operation
0
Internal Use
55.4
0
Discard Non PVID
packets
55.3
1: If the received packets are tagged, the switch will discard packets whose
VID does not match the ingress port’s PVID
0: No packets will be dropped
0
Disable 802.1p
priority
55.2
1: Disable 802.1p priority classification for ingress packets on port 3
0: Enable 802.1p priority classification on port 3
1
Disable Diffserv
priority
55.1
1: Disable Diffserv priority classification for ingress packets on port 3
0: Enable Diffserv priority classification
1
Disable port-based
priority on port 3
55.0
1: Disable port-based priority QoS function on port 3
0: Enable port-based priority QoS function on port 3. Ingress packets on
port 3 will be classed as high priority
1
6.4.4.
Reserved
Table 39. Reserved
Name
Byte.bit
Description
Default
Reserved
56.7~56.0
0x00
Reserved
57.7~57.0
0x00
6.4.5.
Port 3 Control 2 & VLAN Entry [D]
Table 40. Port 3 Control 2 & VLAN Entry [D]
Name
Byte.bit
Description
Default
VLAN Entry [D]
Internal Use
58.7
1
Internal Use
58.6
1
Reserved
58.5
0
VLAN ID [D]
Membership Bit
[4:0]
58.4~58.0
This 5-bit field specifies which ports are the members of VLAN D. If a
destination address look up fails, the packet associated with this VLAN will
be broadcast to the ports specified in this field. Bit 0 stands for port 0, bit 4
stands for port 4.
E.g.:
10001 means port 4 and 0 are the members of VLAN D
10010 means port 4 and 1 are the members of VLAN D
11111 means all 5 ports are the members of VLAN D
1 1000
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