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參數(shù)資料
| 型號： | E-1110 |
| 英文描述： | E-1110 10/100/1000 Mbits/s Ethernet MAC preliminary technical manual 4/01 |
| 中文描述： | 電子1110 10/100/1000 Mbits /秒以太網(wǎng)MAC初步的技術(shù)手冊4 / 01 |
| 文件頁數(shù)： | 74/108頁 |
| 文件大?。?/td> | 577K |
| 代理商： | E-1110 |
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Signals
E110_VLAN_RPVID[11:0]
E-110 VLAN Packet ID
Input
These signals contain the VLAN identier extracted from
the tag control information (TCI) eld of the current
received packet. If E110_VLAN_RPVID[11:0] is 0 and
E110_VLAN_PKT is asserted, the current received
packet is a priority-tagged frame. E110_VLAN_PKT must
be asserted for E110_VLAN_RPVID[11:0] to be valid.
E110_VLAN_PRIORITY[2:0]
E-110 VLAN Packet Priority
Input
These signals contain the user priority of the current
received packet, extracted from the tag control
information (TCI) eld. E110_VLAN_PKT must be
asserted for E110_VLAN_PRIORITY[2:0] to be valid.
E110_VLAN_CFI
E-110 VLAN Packet Canonical Format Indicator Input
The E110_VLAN_CFI signal, when asserted, indicates
that the RIF eld is present in the tag header. When the
E110_VLAN_CFI signal is asserted, the NCFI bit in the
RIF eld determines whether any MAC address
information in the MAC header is in noncanonical or
canonical format. E110_VLAN_PKT must be asserted for
CFI to be valid.
When deasserted, the E110_VLAN_CFI signal indicates
that the RIF eld is not present in the tag header, and
that all MAC address information in the MAC header is in
canonical format.
The E110_VLAN_CFI signal is extracted from the TCI
eld of the current received packet.
For more information regarding the RIF eld in the tag
header and the NCFI bit in that eld, see the
IEEE P802.1Q document.
E110_CRCEN E-110 CRC Append Enable
Output
The E-1110 asserts the E110_CRCEN signal to instruct
the MAC transmit function to append the FCS calculated
by the MAC to the end of the transmitted data. When the
E-1110 deasserts E110_CRCEN, the E-110 core still
calculates the FCS of the transmitted packet data, but
allows the FCS that comes from the E-1110 to be
transmitted with the packet. The E-110 core checks the
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