參數(shù)資料
型號: 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): 55/130頁
文件大?。?/td> 770K
代理商: E-110
MAC Core Signals
2-23
RSV23
Bad packet received. For 100-Mbit/s operation, a
bad packet contains at least one of the following
problems: 4B/5B code violations, dribble nibbles,
bad FCS, less than 64 bytes (short packet), or
more than 1518 bytes or 32 Kbytes (long packet).
For 10-Mbit/s operation, a bad packet contains at
least one of the following problems: Dribble
nibbles, a bad FCS, less than 64 bytes (short
packet), or more than 1518 bytes or 32 Kbytes
(long packet).
RSV22
Long event previously seen. When the MAC
asserts the RSV22 signal, it indicates that at
some time since the last receive vector a long
event was detected, noted, and reported with this
vector. The long event is not associated with this
packet. A long event is activity on the network in
excess of 50,000 bit times. A long event is not
detected in full-duplex mode. If RSV22 is
deasserted, it indicates that a long event was not
seen.
RSV21
Invalid preamble content (not 55H) or code
(0x50555) seen in the last reception.
RSV20
Broadcast packet received (all ones in the
destination address field).
RSV19
Multicast packet received. (The first bit in the
destination address field, which is also the least
significant bit, is equal to a one—the least signif-
icant bit is transmitted first.)
RSV18
FCS error detected in the received packet. The
FCS bytes in the received packet do not match
those the MAC calculates at the destination while
the packet is being received.
RSV17
Dribble nibble seen in the received packet. Each
byte consists of two nibbles, so the number of
received nibbles should always be even. If there
is an odd number of nibbles, the last nibble is the
dribble nibble.
RSV16
Receive code violation detected. There is a
4B/5B code violation. See the RSV24 signal
description for a definition of code-group viola-
tions. The PHY asserts MRXER whenever a
receive code-group violation occurs.
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