参数资料
型号: ZL50408GDG2
厂商: CONEXANT SYSTEMS
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA208
封装: 17 X 17 MM, 1.40 MM HEIGHT, LEAD FREE, MO-192, LBGA-208
文件页数: 10/144页
文件大小: 1779K
代理商: ZL50408GDG2
ZL50408
Data Sheet
107
Zarlink Semiconductor Inc.
12.3.7.2
MII_OP1 – MII Register Option 1
IC Address: h0BD; CPU Address: h0601
Accessed by CPU and IC (R/W)
12.3.7.3
FEN – Feature Enable Register
IC Address: h0BE; CPU Address: h0602
Accessed by CPU and IC (R/W)
Bits [3:0]:
Duplex bit location in vendor specified register
Bits [7:4]:
Speed bit location in vendor specified register
(Default 00)
Bit [0]:
Statistic Counter
0 – Disable (Default)
1 – Enable (all ports)
When statistic counter is enable, an interrupt control frame is generated to
the CPU, every time a counter wraps around. This feature requires an
external CPU.
Bit [1]:
0
Bit [2]:
Support DS EF Code.
0 – Disable (Default)
1 – Enable (all ports)
When 101110 is detected in DS field (TOS[7:2]), the frame priority is set for
110 and drop is set for 0.
Bit [3]:
Enable VLAN ID hashing
0 – Disable (Default)
1 – Enable
If this is enabled, the VLAN ID will be used along with the MAC address when
determining the HASH index for learning/searching. This is to allow
Independent VLAN Learning (IVL).
This feature is only applicable in tagged-based VLAN mode
(PVMODE[0]=’1’). In port-based VLAN mode (PVMODE[0]=’0’), this bit must
be ‘0’.
Bit [4]:
Disable IP Multicast Support
0 – Enable IP Multicast Support (Must also set PVMODE[6]=1)
1 – Disable IP Multicast Support (Default)
When enable, IGMP packets are identified by search engine and are passed
to the CPU for processing. IP multicast packets are forwarded to the IP
multicast group members according to the VLAN port mapping table.
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