zl50400 Zarlink Semiconductor, zl50400 Datasheet - Page 72

• Manufacturer Part Number: zl50400
• Description: Lightly Managed/unmanaged 9-port 10/100 M Ethernet Switch
• Manufacturer: Zarlink Semiconductor

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.
12.3.3.6
CPU Address:h228+2n (n = hash value)
Accessed by CPU (R/W)
12.3.3.7
CPU Address:h229+2n (n = hash value)
Accessed by CPU (R/W)
Bits [7:0]:
Bits [1:0]:
Bit [2]:
Bits [3:0]
Bits [7:4]
TRUNKn_HASH76 – Trunk group n hash result 7/6 destination port number
MULTICAST_HASHn-0 – Multicast hash result 0~7 mask byte 0
MULTICAST_HASHn-1 – Multicast hash result 0~7 mask byte 1
Port 9-8 bit map for multicast hash. (Default 0x3)
Reserved (Default 0x1)
Port 7-0 bit map for multicast hash. (Default 0xFF)
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
ZL50400
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9
P
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8
HASH0-0
HASH1-0
HASH2-0
HASH3-0
HASH4-0
HASH5-0
HASH6-0
HASH7-0
P
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7
P
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0
Data Sheet