zl50411 Zarlink Semiconductor, zl50411 Datasheet - Page 94

• Manufacturer Part Number: zl50411
• Description: Managed 9-port Fast Ethernet Switch With Private Vlan
• Manufacturer: Zarlink Semiconductor

12.3.6.2
I
Accessed by CPU and I
12.3.6.3
I²C Address: h069; CPU Address: h0511
Accessed by CPU and I²C (R/W)
2
C Address: h068; CPU Address: h0510
Bit [1]:
Bits [4:2]:
Bit [5]:
Bit [6]:
Bit [7]:
Bits [7:0]:
See Programming QoS Registers application note, ZLAN-42, for more information
Bits [7:0]:
See Programming QoS Registers application note, ZLAN-42, for more information
PCC – Packet Congestion Control
MCC – Multicast Congestion Control
2
C (R/W)
Packet congestion control on the granule count of P0 queue.
Used to trigger RED at B% when destination port’s P0 queue granule count
reaches PCC and shared pool is all in use. Granularity is 16 granule (Default
0x6).
Global congestion control on the multicast granule count.
Used to trigger 100% drop (or flow control, if FC enabled on source port)
when total multicast granule count reaches MCC. Granularity is 16 granule
(Default 0x6).
Enable RX rate control (on RMAC ports only)
0 – Disable (Default)
1 – Enable
Reserved
Select VLAN tag or TOS (IP packets) to be preferentially picked to map
transmit priority and drop precedence
0 – Select VLAN Tag priority field over TOS (Default)
1 – Select TOS over VLAN tag priority field
Select TOS bits for transmission priority
0 – Use TOS [4:2] bits to map the transmit priority (Default)
1 – Use TOS [7:5] bits to map the transmit priority
Select TOS bits for drop precedence
0 – Use TOS [4:2] bits to map the drop precedence (Default)
1 – Use TOS [7:5] bits to map the drop precedence
Zarlink Semiconductor Inc.
ZL50411
94
Data Sheet