adm6995 ETC-unknow, adm6995 Datasheet - Page 36

• Manufacturer Part Number: adm6995
• Description: Port 10/100 Mb/s Single Chip Ethiernet Switch Controller
• Manufacturer: ETC-unknow

ADM6995L
ADMtek Inc.
Bits
1:0
2
3
4
5
6
7
9:8
11:10 R/W Discard mode (drop scheme for Q1)
13:12 R/W Discard mode (drop scheme for Q2)
15:14 R/W Discard mode (drop scheme for Q3)
4.3.10
4.3.11
ADM6995L check byte 12 &13 if this value is 0800h then ADM6995L 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 Broadcast Storming Threshold [1:0]. See below table.
R/W Broadcast Storming Enable. 1/ enable, 0/disable. Default 0.
R/W Reserved. Default 0.
R/W XCRC. 1/disable CRC check, 0/enable CRC Check. Default 0.
R/W Aging Disable. 1/disable aging, 0/enable aging. Default 0.
R/W Discard mode (drop scheme for Q0)
RO Reserved
RO Reserved
Byte 14
the max. packet number = 7490 in 100Base, 749 in 10Base
TOS IP Packet
Byte 15: Service type
Miscellaneous Configuration Register, offset: 0x10h
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
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