zl50415 Zarlink Semiconductor, zl50415 Datasheet - Page 84

• Manufacturer Part Number: zl50415
• Description: Managed 16-port 10/100 M + 2-port 1 G Ethernet Switch
• Manufacturer: Zarlink Semiconductor

14.9.3
I
Accessed by CPU, serial interface and I
2
C Address h0AC; CPU Address:h502
FCR – Flooding Control Register
Bit [4]:
Bit [5]:
Bit [6]:
Bit [7]:
Bit [3:0]:
Bit [6:4]:
Bit [7]:
7
Tos
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•
•
•
•
•
•
Per VLAN Multicast Flow Control (Default 0)
Select processor multicast queue size
Select TOS bits for Priority (Default 0)
Select TOS bits for Drop priority(Default 0)
- 0 – Disable
- 1 – Enable
- 0 = 16 entries
- 1 = 64 entries
- 0 – Use TOS [4:2] bits to map the transmit priority
- 1 – Use TOS [7:5] bits to map the transmit priority
- 0 – Use TOS [4:2] bits to map the drop priority
- 1 – Use TOS [7:5] bits to map the drop priority
6
TimeBase
U2MR: Unicast to Multicast Rate. Units in terms of time base defined in
bits [6:4]. This is used to limit the amount of flooding traffic. The value
in U2MR specifies how many packets are allowed to flood within the
time specified by bit [6:4]. To disable this function, program U2MR to 0.
(Default = 8)
Time Base: (Default = 000)
Select VLAN tag or TOS (IP packets) to be preferentially picked to map
transmit priority and drop priority ( Default = 0 ).
- 000 = 100 us
- 001 = 200 us
- 010 = 400 us
- 011 = 800 us
- 100 = 1.6 ms
- 101 = 3.2 ms
- 110 = 6.4 ms
- 111 = 100 us, same as 000.
- 0 – Select VLAN Tag priority field over TOS
- 1 – Select TOS over VLAN tag priority field
2
C (R/W)
4
Zarlink Semiconductor Inc.
3
U2MR
ZL50418
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Data Sheet