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MVTX2602
Data Sheet
86
Zarlink Semiconductor Inc.
Map TOS field in IP packet into eight level transmit priorities:
13.6.10 AVDM – VLAN Discard Map
I2C Address h0B3, CPU Address:h509
Accessed by CPU, serial interface and I2C (R/W)
Map VLAN priority into frame discard when low priority buffer usage is above threshold
13.6.11 TOSDML – TOS Discard Map
I2C Address h0B4, CPU Address:h50A
Accessed by CPU, serial interface and I2C (R/W)
Map TOS into frame discard when low priority buffer usage is above threshold
Bit [1:0]:
Priority when the TOS field is 5
(Default 0)
Bit [4:2]:
Priority when the TOS field is 6
(Default 0)
Bit [7:5]:
Priority when the TOS field is 7
(Default 0)
7
6
5
4
3
2
1
0
FDV7
FDV6
FDV5
FDV4
FDV3
FDV2
FDV1
FDV0
Bit [0]:
Frame drop priority when VLAN Tag priority field is 0
(Default 0)
Bit [1]:
Frame drop priority when VLAN Tag priority field is 1
(Default 0)
Bit [2]:
Frame drop priority when VLAN Tag priority field is 2
(Default 0)
Bit [3]:
Frame drop priority when VLAN Tag priority field is 3
(Default 0)
Bit [4]:
Frame drop priority when VLAN Tag priority field is 4
(Default 0)
Bit [5]:
Frame drop priority when VLAN Tag priority field is 5
(Default 0)
Bit [6]:
Frame drop priority when VLAN Tag priority field is 6
(Default 0)
Bit [7]:
Frame drop priority when VLAN Tag priority field is 7
(Default 0)
7
6
5
4
3
2
1
0
FDT7
FDT6
FDT5
FDT4
FDT3
FDT2
FDT1
FDT0
Bit [0]:
Frame drop priority when TOS field is 0
(Default 0)
Bit [1]:
Frame drop priority when TOS field is 1
(Default 0)
Bit [2]:
Frame drop priority when TOS field is 2
(Default 0)
Bit [3]:
Frame drop priority when TOS field is 3
(Default 0)
Bit [4]:
Frame drop priority when TOS field is 4
(Default 0)