RTL8305SC
Datasheet
5-port 10/100Mbps Single-Chip Dual MII Switch Controller
28
Track ID: JATR-1076-21 Rev. 1.2
Name
Byte.bit
Description
Default
Disable VLAN
member set
ingress filtering
1.1
1: The switch will not drop the received frame if the ingress port of this
packet is not included in the matched VLAN member set. It will still forward
the packet to the VLAN members specified in the matched member set. This
setting works on both port-based and tag-based VLAN configurations
0: The switch will drop the received frame if the ingress port of this packet is
not included in the matched VLAN member set
1
Disable VLAN
tag admit control
1.0
1: The switch accepts all frames it receives whether tagged or untagged.
0: The switch will only accept tagged frames and will drop untagged frames.
1
6.1.3.
Global Control Register2
Table 14. Global Control Register2
Name
Byte.bit
Description
Default
Internal Use
2.7
0
Internal Use
2.6
0
Internal Use
2.5~2.0
11 1111
6.1.4.
Global Control Register3
Table 15. Global Control Register3
Name
Byte.bit
Description
Default
Internal Use
3.7
0
Internal Use
3.6
0
Internal Use
3.5~3.0
11 1111
6.1.5.
Global Control Register4
Table 16. Global Control Register4
Name
Byte.bit
Description
Default
Reserved
4.7
1
Enable defer
4.6
1: Enable carrier sense deferring for half duplex back pressure
0: Disable carrier sense deferring for half duplex back pressure
1
LED blink time
4.5
1: On 43ms, then Off 43ms
0: On 120ms, then Off 120ms
1
Queue weight
4.4~4.3
The frame service ratio between the high priority queue and low priority
queue is:
11=16:1
10=Always high priority queue first
01=8:1
00=4:1
11
Disable broadcast
storm control
4.2
1: Disable Broadcast Storm Control
0: Enable Broadcast Storm Control
1
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