參數(shù)資料
型號(hào): E-110
廠商: LSI Corporation
英文描述: 100BASE-T Fast Ethernet Core(100BASE-T快速以太網(wǎng)處理芯片 Fast Ethernet Core)
中文描述: 100兆- T的快速以太網(wǎng)核心(100兆- T的快速以太網(wǎng)處理芯片快速以太網(wǎng)核心)
文件頁數(shù): 119/130頁
文件大?。?/td> 770K
代理商: E-110
A-1
Appendix A
Glossary
Address Filtering (Individual, Multicast, Promiscuous)
Address filtering is the process the E-110 core performs to match a des-
tination address within a received frame with an address derived at the
receiving station. There are three common types of address filtering:
Individual—the first bit of an individual address is a zero. The incom-
ing destination address is compared with the data from the individual
address pins. When all 48 bits match and the receiver is enabled,
the address filter passes.
Multicast—the first bit of an multicast address is a one. When the
destination address bits that are received in the frame contain a mul-
ticast address, the E-110 core uses its built-in FCS generator to com-
pute a nine-bit polynomial (the nine most significant bits of the 32-bit
FCS generator) from the incoming address. The value of this poly-
nomial can be used as an index into an external multicast filter hash
table. External logic can decide to either accept or reject the incom-
ing frame. The external logic enables the multicast address filter.
Promiscuous—when the external logic asserts the individual address
promiscuous mode enable pin (RPMEN) HIGH and the destination
address is an individual address, the address filter always passes,
and the incoming frame is received.
Attachment Unit Interface (AUI)
The AUI is the interface between the medium attachment unit (MAU) and
the data terminal equipment (DTE) device or repeater. A typical AUI
interface consists of a 15-pin “D” connector.
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