參數(shù)資料
型號(hào)： LU3X34FTR
英文描述： Quad 3 V 10/100 Ethernet Transceiver TX/FX
中文描述： 四3伏10/100以太網(wǎng)收發(fā)器德克薩斯州/外匯
文件頁(yè)數(shù)： 20/52頁(yè)
文件大?。?/td> 678K
代理商： LU3X34FTR
20
Lucent Technologies Inc.
LU3X34FTR
Quad 3 V 10/100 Ethernet Transceiver TX/FX
Preliminary Data Sheet
July 2000
Functional Description
(continued)
100Base-X Transmitter
The 100Base-X transmitter consists of functional
blocks which convert synchronous 4-bit nibble data, as
provided by the internal MII, to a 125 Mbits/s serial
data stream. This data stream may be routed either to
the on-chip twisted-pair PMD for 100Base-TX signal-
ing, or to an external fiber-optic PMD for 100Base-FX
applications. The LU3X34FTR implements the
100Base-X transmit state machine as specified in the
IEEE802.3u Standard, Clause 24 and comprises the
following functional blocks in its data path:
I
Symbol encoder.
I
Scrambler block.
I
Parallel/serial converter and NRZ/NRZI encoder
block.
Symbol Encoder
The symbol encoder converts 4-bit (4B) nibble data
generated by the RMII-MII module into 5-bit (5B) sym-
bols for transmission. This conversion is required to
allow control symbols to be combined with data sym-
bols. Refer to Table 11 for 4B to 5B symbol mapping.
Following onset of the TXEN signal, the 4B/5B symbol
encoder replaces the first two nibbles of the preamble
from the MAC frame with a /J/K code-group pair (11000
10001) start-of-stream delimiter (SSD). The symbol
encoder then replaces subsequent 4B codes with cor-
responding 5B symbols. Following negation of the
TXEN signal, the encoder substitutes the first two idle
symbols with a /T/R code-group pair (01101 00111)
end-of-stream delimiter (ESD) then continuously injects
idle symbols into the transmit data stream until the next
transmit packet is detected.
相關(guān)PDF資料
PDF描述
LU3X34FTR-HS128-DB Quad 3 V 10/100 Ethernet Transceiver TX/FX
LU3X34FTR Quad 3 V 10/100 Ethernet Transceiver(四通道10M位/秒和100 M位/秒以太網(wǎng)收發(fā)器)
LU3X54FT QUAD-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX
LU3X54FTL QUAD-FET for 10Base-T/100Base-TX/FX
LU3X54FTL-HS208-DB QUAD-FET for 10Base-T/100Base-TX/FX
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LU3X34FTR-HS128-DB 制造商:AGERE 制造商全稱:AGERE 功能描述:Quad 3 V 10/100 Ethernet Transceiver TX/FX
LU3X54FT 制造商:AGERE 制造商全稱:AGERE 功能描述:QUAD-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX
LU3X54FTL 制造商:AGERE 制造商全稱:AGERE 功能描述:QUAD-FET for 10Base-T/100Base-TX/FX
LU3X54FTLHS208 制造商:Alcatel-Lucent 功能描述:3X54FTLHS208
LU3X54FTL-HS208-DB 制造商:AGERE 制造商全稱:AGERE 功能描述:QUAD-FET for 10Base-T/100Base-TX/FX
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