參數(shù)資料
型號(hào)： IP178C-DS-R01
廠商： Electronic Theatre Controls, Inc.
英文描述： 8 Port 10/100 Ethernet Integrated Switch
中文描述： 8端口10/100以太網(wǎng)集成開關(guān)
文件頁(yè)數(shù)： 45/93頁(yè)
文件大?。?/td> 538K
代理商： IP178C-DS-R01
IP178C/IP178C LF/IP178CH/IP178CH LF
Datasheet
Special tag
IP178C/IP178CH
supports special tag function to exchange switching information with CPU without
involving VLAN tag information. The special tag function is enabled by programming MII register 31.30[14]
STAG_EN.
From CPU to switch
When special tag function is enabled,
IP178C/IP178CH
forwards packets from MII (CPU) by checking
special tag added by CPU. The tag definition is shown in the following table.
IP178C/IP178CH
will
remove the special tag 81XX and re-calculate CRC when it forwards the packet to a un-tag field.
IP178C/IP178CH
will update the special tag to 81XX and re-calculate CRC when it forwards the packet
to a tag field.
Preamble
SFD
DA
SA
81XX(special tag)
Special tag 81XX
bit [15:12]
bit[11:8]
8
1
0000_0001: instruct 178C forwards the packet to port 0
0000_0010: instruct 178C forwards the packet to port 1
0000_0100: instruct 178C forwards the packet to port 2
0000_1000: instruct 178C forwards the packet to port 3
0001_0000: instruct 178C forwards the packet to port 4
0010_0000: instruct 178C forwards the packet to port 5
0100_0000: instruct 178C forwards the packet to port 6
1000_0000: instruct 178C forwards the packet to port 7
From switch to CPU
When special tag function is enabled,
IP178C/IP178CH
sends packets to MII (CPU) with source port
information by adding special tag to the frame.
IP178C/IP178CH
will add the special tag 81XX and
re-calculate CRC when it receives the packet from a un-tag field.
IP178C/IP178CH
will update the tag
8100 to 81XX and re-calculate CRC when it receives the packet from a tag field. The tag definition is
shown in the following table.
Bit[15:12]
bit[11:8]
8
1
0000 0001: the source port of the packet is port 0
0000 0010: the source port of the packet is port 1
0000 0100: the source port of the packet is port 2
0000 1000: the source port of the packet is port 3
0001 0000: the source port of the packet is port 4
0010 0000: the source port of the packet is port 5
0100 0000: the source port of the packet is port 6
1000 0000: the source port of the packet is port 7
Copyright
2004, IC Plus Corp.
45/93
June 21, 2007
IP178Cx-DS-R12
Data
CRC
bit[7:0]
bit[7:0]
相關(guān)PDF資料
PDF描述
IP178C-DS-R02 8 Port 10/100 Ethernet Integrated Switch
IP178C 8 Port 10/100 Ethernet Integrated Switch
IP178CH 8 Port 10/100 Ethernet Integrated Switch
IP178CHLF 8 Port 10/100 Ethernet Integrated Switch
IP178CLF 8 Port 10/100 Ethernet Integrated Switch
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IP178C-DS-R02 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch
IP178C-DS-R03 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch
IP178C-DS-R04 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch
IP178C-DS-R05 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch
IP178C-DS-R06 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8 Port 10/100 Ethernet Integrated Switch
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