参数资料
型号: ZL50408GDC
厂商: CONEXANT SYSTEMS
元件分类: 网络接口
英文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA208
封装: 17 X 17 MM, 1.40 MM HEIGHT, MO-192, LBGA-208
文件页数: 140/144页
文件大小: 1779K
代理商: ZL50408GDC
ZL50408
Data Sheet
95
Zarlink Semiconductor Inc.
12.3.6.2
PCC – Packet Congestion Control
I2C Address: h068; CPU Address: h0510
Accessed by CPU and I2C (R/W)
12.3.6.3
MCC – Multicast Congestion Control
IC Address: h069; CPU Address: h0511
Accessed by CPU and IC (R/W)
12.3.6.4
MCCTH – Multicast Threshold Control
CPU Address: h0512
Accessed by CPU (R/W)
12.3.6.5
RDRC0 – WRED Rate Control 0
IC Address: h090; CPU Address: h0513
Accessed by CPU and I2C (R/W)
Bits [7:0]:
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).
See Programming QoS Registers application note, ZLAN-42, for more information
Bits [7:0]:
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).
See Programming QoS Registers application note, ZLAN-42, for more information
Bits [7:0]:
Global congestion control threshold on the multicast granule count. Exceeding
the MCCTH threshold is considered as an indication of multicast resources being
low.
Used to trigger RED at B% when when total multicast granule count reaches
MCCTH. Granularity is 16 granule (Default 0x3).
See Programming QoS Registers application note, ZLAN-42, for more information
Bits [3:0]:
Corresponds to the frame drop percentage Y% for WRED. Granularity
6.25%.
Bits [7:4]:
Corresponds to the frame drop percentage X% for WRED. Granularity
6.25%.
See Programming QoS Registers application note, ZLAN-42, for more information
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