參數(shù)資料
型號: L80227
廠商: LSI CORP
元件分類: 網(wǎng)絡(luò)接口
英文描述: 10BASE-T/100BASE-TX Ethernet Physical Layer Device (PHY)(10BASE-T/100BASE-TX 以太網(wǎng)物理層處理器)
中文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封裝: LQFP-64
文件頁數(shù): 31/158頁
文件大?。?/td> 1084K
代理商: L80227
Draft 6/5/00
Block Diagram Description
2-11
Copyright 1999 by LSI Logic Corporation. All rights reserved.
Because the OSCIN input clock generates the TX_CLK output clock, the
TXD[3:0], TX_EN, and TX_ER signals are also clocked in on rising
edges of OSCIN.
On the receive side, as long as a valid data packet is not detected, CRS
and RX_DV are deasserted and the RXD[3:0] signals are held LOW.
When the start of packet is detected, CRS and RX_DV are asserted on
the falling edge of RX_CLK. The assertion of RX_DV indicates that valid
data is clocked out on RXD[3:0] on the falling edge of the RX_CLK. The
RXD[3:0] data has the same frame structure as the TXD[3:0] data and
is specified in IEEE 802.3 and shown in
Figure 2.3
. When the end of the
packet is detected, CRS and RX_DV are deasserted, and RXD[3:0] is
held LOW. CRS and RX_DV also stay deasserted if the device is in the
Link Fail State.
RX_ER is a receive error output that is asserted when certain errors are
detected on a data nibble. RX_ER is asserted on the falling edge of
C
Data C
0b11010
0b1100
D
Data D
0b11011
0b1101
E
Data E
0b11100
0b1110
F
Data F
0b11101
0b1111
I
Idle
0b11111
0b0000
J
SSD #1
0b11000
0b0101
K
SSD #2
0b10001
0b0101
T
ESD #1
0b01101
0b0000
R
ESD #2
0b00111
0b0000
H
Halt
0b00100
Undefined
Invalid codes
All others
1
0b0000*
1. These 5B codes are not used. The decoder decodes these 5B codes to
4B 0000. The encoder encodes 4B 0000 to 5B 11110, as shown in symbol
Data 0.
Table 2.4
4B/5B Symbol Mapping (Cont.)
Symbol
Name
Description
5B Code
4B Code
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L80227/B 制造商:LSI Corporation 功能描述: 制造商:LSI Corporation 功能描述:L80227/B
L80227/BI 制造商:LSI Corporation 功能描述:L80227/BI
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L80227-I 制造商:LSI Corporation 功能描述:STD CELL ASIC
L80227-I-LEADFREE 制造商:LSI Corporation 功能描述:796000124413