zl50400 Zarlink Semiconductor, zl50400 Datasheet - Page 81
zl50400
Manufacturer Part Number
zl50400
Description
Lightly Managed/unmanaged 9-port 10/100 M Ethernet Switch
Manufacturer
Zarlink Semiconductor
Datasheet
1.ZL50400.pdf
(124 pages)
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12.3.6.2
I
Accessed by CPU and I
12.3.6.3
I²C Address h069, CPU Address: 511
Accessed by CPU and I²C (R/W)
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
2
C Address h068, CPU Address: 510
Bits [7:0]:
Bits [7:0]:
Bits [7:0]:
Bits [3:0]:
Bits [7:4]:
See Programming QoS Registers application note, ZLAN-42, for more information
UCC – Unicast Congestion Control
MCC – Multicast Congestion Control
MCCTH – Multicast Threshold Control
RDRC0 – WRED Rate Control 0
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
2
C (R/W)
C (R/W)
Number of frame count. Used for best effort dropping at B% when destination
port’s best effort queue reaches UCC threshold and shared pool is all in use.
Granularity is 16 granule (Default 0x6)
In multiples of 16 granules (granularity). Used for triggering MC flow control
when destination port’s multicast best effort queue reaches MCC threshold.
(Default 0x6)
Corresponds to the frame drop percentage Y% for WRED. Granularity
6.25%.
Corresponds to the frame drop percentage X% for WRED. Granularity
6.25%.
Zarlink Semiconductor Inc.
ZL50400
81
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