zl50409 Zarlink Semiconductor, zl50409 Datasheet - Page 91

• Manufacturer Part Number: zl50409
• Description: Managed 9-port 10/100m Ethernet Switch
• Manufacturer: Zarlink Semiconductor

12.3.6.4
CPU Address: 512
Accessed by CPU (R/W)
12.3.6.5
I²C Address 090, CPU Address 513
Accessed by CPU and I
12.3.6.6
I²C Address 091, CPU Address 514
Accessed by CPU and I²C (R/W)
12.3.6.7
CPU Address 515
Accessed by CPU (R/W)
Bits [7:0]:
Bits [3:0]:
Bits [7:4]:
See Programming QoS Registers application note, ZLAN-42, for more information
Bits [3:0]:
Bits [7:4]:
See Programming QoS Registers application note, ZLAN-42, for more information
Bits [3:0]:
Bits [7:4]:
MCCTH – Multicast Threshold Control
RDRC0 – WRED Rate Control 0
RDRC1 – WRED Rate Control 1
RDRC2 – WRED Rate Control 2
Threshold on the multicast granule count. Exceeding the threshold consider as
multicast resource low and the new multicast will be dropped at B% or flow con-
trol is triggered if enabled. (Default: 0x3)
2
C (R/W)
Corresponds to the frame drop percentage Y% for WRED. Granularity
6.25%.
Corresponds to the frame drop percentage X% for WRED. Granularity
6.25%.
Corresponds to the best effort frame drop percentage B%, when shared pool
is all in use and destination port best effort queue reaches UCC. Granularity
6.25%.
Corresponds to the frame drop percentage Z% for WRED. Granularity
6.25%.
Corresponds to the frame drop percentage RB% for ingress rate control.
Granularity 6.25%.
Corresponds to the frame drop percentage RA% for ingress rate control.
Granularity 6.25%.
Zarlink Semiconductor Inc.
ZL50409
91
Data Sheet