zl50405 Zarlink Semiconductor, zl50405 Datasheet - Page 79

• Manufacturer Part Number: zl50405
• Description: Managed5-port 10/100 M Ethernet Switch
• Manufacturer: Zarlink Semiconductor

12.3.3.3
CPU Address:h209+4n (n = trunk group)
Accessed by CPU (R/W)
12.3.3.4
CPU Address:h20A+4n (n = trunk group)
Accessed by CPU (R/W)
12.3.3.5
CPU Address:h20B+4n (n = trunk group)
Accessed by CPU (R/W)
Multicast Hash Registers
Multicast Hash registers are used to distribute multicast traffic. 16 registers are used to form a 8-entry array; each
entry has 10 bits, with each bit representing one port. Any port not belonging to a trunk group should be
programmed with 1. Ports belonging to the same trunk group should only have a single port set to “1” per entry. The
port set to “1” is picked to transmit the multicast frame when the hash value is met.
Bits [3:0]
Bits [7:4]
Bits [3:0]
Bits [7:4]
Bits [3:0]
Bits [7:4]
TRUNKn_HASH32 – Trunk group n hash result 3/2 destination port number
TRUNKn_HASH54 – Trunk group n hash result 5/4 destination port number
TRUNKn_HASH76 – Trunk group n hash result 7/6 destination port number
Hash result 2 destination port number (Default 0)
Hash result 3 destination port number (Default 0)
Hash result 4 destination port number (Default 0)
Hash result 5 destination port number (Default 0)
Hash result 6 destination port number (Default 0)
Hash result 7 destination port number (Default 0)
Hash Value =0
Hash Value =1
Hash Value =2
Hash Value =3
Hash Value =4
Hash Value =5
Hash Value =6
Hash Value =7
Zarlink Semiconductor Inc.
HASH0-1
HASH1-1
HASH2-1
HASH3-1
HASH4-1
HASH5-1
HASH6-1
HASH7-1
ZL50405
79
P
o
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t
9
P
o
r
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8
HASH0-0
HASH1-0
HASH2-0
HASH3-0
HASH4-0
HASH5-0
HASH6-0
HASH7-0
P
o
r
t
3
P
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0
Data Sheet