adm6996f Infineon Technologies Corporation, adm6996f Datasheet - Page 38

• Manufacturer Part Number: adm6996f
• Description: 6 Port 10/100 Mb/s Single Chip Ethernet Switch Controller
• Manufacturer: Infineon Technologies Corporation

ADM6996F
Infineon-ADMtek Co Ltd
4.3.10 TOS IP Packet
4.3.11 Miscellaneous Configuration Register, offset: 0x10h
Bits
15:14 R/W Discard mode (drop scheme for Q3)
13:12 R/W Discard mode (drop scheme for Q2)
11:10 R/W Discard mode (drop scheme for Q1)
9:8
7
6
5
4
3
2
1:0
ADM6996F check byte 12 &13 if this value is 0800h then ADM6996F knows this is a
TOP priority packet.
Type 0800
Byte 12~13
IP header define
Note:
Bit[1:0]: Broadcast Storming threshold.
- time interval : 50ms
Type Description
R/W Discard mode (drop scheme for Q0)
R/W Aging Disable. 1/disable aging, 0/enable aging. Default 0.
R/W XCRC. 1/disable CRC check, 0/enable CRC Check. Default 0.
R/W Reserved. Default 0.
R/W Broadcast Storming Enable. 1/ enable, 0/disable. Default 0.
R/W Broadcast Storming Threshold[1:0]. See below table.
RO Reserved
RO Reserved
Byte 14
the max. packet number = 7490 in 100Base, 749 in 10Base
Byte 15: Service type
Broadcast storm mode after initial:
Bit[7:0]: IP protocol version number & header length.
Bit[7~5]: IP Priority (Precedence ) from 7~0
Bit 4: No Delay (D)
Bit 3: High Throughput
Bit 2: High Reliability (R)
Bit[1:0]: Reserved
IP Header
Byte 14~15
Register Description
Initial value
0x0h
0x0h
0x0h
0x0h
0x0h
0x1h
0x0h
0x0h
0x0h
0x0h
0x0h
4-1