参数资料
型号: ZL50408GDG2
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, LEAD FREE, MO-192, LBGA-208
文件页数: 143/144页
文件大小: 1779K
代理商: ZL50408GDG2
ZL50408
Data Sheet
98
Zarlink Semiconductor Inc.
12.3.6.14
AVPMH – VLAN Priority Map
IC Address: h058; CPU Address: h0532
Accessed by CPU and IC (R/W)
Map VLAN priority into eight level transmit priorities:
12.3.6.15
AVDM – VLAN Discard Map
IC Address: h05C; CPU Address: h0533
Accessed by CPU and IC (R/W)
Map VLAN priority into frame discard when low priority buffer usage is above threshold
12.3.6.16
TOSPML – TOS Priority Map
IC Address: h059; CPU Address: h0540
Accessed by CPU and IC (R/W)
Map TOS field in IP packet into eight level transmit priorities
Bits [1:0]:
Priority when the VLAN tag priority field is 5 (Default 0)
Bits [4:2]:
Priority when the VLAN tag priority field is 6 (Default 0)
Bits [7:5]:
Priority when the VLAN tag priority field is 7 (Default 0)
Bit [0]:
Frame drop precedence when VLAN Tag priority field is 0 (Default 0)
0 – Drop Precedence Level 0 (Lowest) (Default)
1 – Drop Precedence Level 1 (Highest)
Bit [1]:
Frame drop precedence when VLAN Tag priority field is 1 (Default 0)
Bit [2]:
Frame drop precedence when VLAN Tag priority field is 2 (Default 0)
Bit [3]:
Frame drop precedence when VLAN Tag priority field is 3 (Default 0)
Bit [4]:
Frame drop precedence when VLAN Tag priority field is 4 (Default 0)
Bit [5]:
Frame drop precedence when VLAN Tag priority field is 5 (Default 0)
Bit [6]:
Frame drop precedence when VLAN Tag priority field is 6 (Default 0)
Bit [7]:
Frame drop precedence when VLAN Tag priority field is 7 (Default 0)
Bits [2:0]:
Priority when the TOS field is 0 (Default 0)
Transmit Priority Level 0 (Lowest)
Transmit Priority Level 1
...
Transmit Priority Level 6
Transmit Priority Level 7 (Highest)
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