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參數(shù)資料
| 型號： | 84221 |
| 廠商： | LSI Corporation |
| 英文描述： | Quad 100BaseTX/100BaseFX/10BaseT Physical Layer Device （Highly Integrated Ethernet Transceiver For Twisted Pair And Fiber Ethernet Applications）(四通道100BaseTX/100BaseFX/10BaseT 物理層處理器（高度集成的以太網(wǎng)雙絞線和光纖數(shù)據(jù)收發(fā)器）) |
| 中文描述： | 四100BaseTX/100BaseFX/10BaseT物理層裝置（高度集成的以太網(wǎng)收發(fā)器，雙絞線和光纖以太網(wǎng)的應(yīng)用）（四通道100BaseTX/100BaseFX/10BaseT物理層處理器（高度集成的以太網(wǎng)雙絞線和光纖數(shù)據(jù)收發(fā)器） ） |
| 文件頁數(shù)： | 12/70頁 |
| 文件大?。?/td> | 1017K |
| 代理商： | 84221 |
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12
MD400184/A
84221
2.0 Functional Description
2.1 GENERAL
The 84221 is a complete 10/100 Mbps Ethernet Media
Interface IC. The 84221 has four separate and
independent channels. Each channel has the following
main sections: controller interface, encoder, decoder,
scrambler, descrambler, clock and data recovery, twisted
pair interface transmitter, twisted pair interface receiver,
and auto negotiation. A Management Interface (MI) serial
port, which provides access to eleven registers for each
channel, is common to all four channels. Figure 1 shows
the 84221 block diagram.
The 84221 can operate as a 100BaseTX device (100
Mbps mode) or as a 10BaseT device (10 Mbps mode).
The 100 Mbps and 10 Mbps modes differ in data rate,
signalling protocol, and allowed wiring as follows:
The 100 Mbps TX mode uses two pairs of category 5, or
better, UTP or STP twisted pair cable with 4B5B
encoded, scrambled, and MLT3 coded (ternary) 125
MHz data to achieve a throughput of 100 Mbps.
The 10 Mbps mode uses two pairs of category 3, or
better, UTP or STP twisted pair cable with Manchester
encoded 10 MHz binary data to achieve a 10 Mbps
thruput.
The data symbol format on the fiber or twisted pair cable
for the 100 and 10 Mbps modes is defined in IEEE 802.3
specifications and shown in Figure 2.
On the transmit side for 100 Mbps operation, data is
received on the controller interface from an external
Ethernet controller per the format shown in Figure 3. The
data is sent to the encoder for formatting. For TX
operation, the encoded data is sent to the scrambler. The
encoded and scrambled data is then sent to the TX
transmitter. The transmitter converts the encoded and
scrambled data into MLT3 ternary format. The transmitter
then preshapes the output and drives the twisted pair
cable.
Figure 2. Frame Format
PREAMBLE
SFD
DA
LLC DATA
FCS
SA
INTERFRAME
GAP
ETHERNET MAC FRAME
LN
INTERFRAME
GAP
SSD
PREAMBLE
SFD
LLC DATA
FCS
DA
IDLE
100 BASE-TX DATA SYMBOLS
SA
IDLE
LN
ESD
= [ 1 1 1 1 ...]
= [ 1 1 0 0 0 1 0 0 0 1 ]
= [ 0 1 1 0 1 0 0 1 1 1 ]
= [ DATA ]
= [ 1 1 ]
= [ 1 0 1 0 ...] 62 BITS LONG
ESD
DA, SA, LN, LLC DATA, FCS
SSD
PREAMBLE
SFD
IDLE
BEFORE / AFTER
4B5B ENCODING,
SCRAMBLING, AND
MLT3 CODING
PREAMBLE
SFD
LLC DATA
FCS
DA
IDLE
10 BASE-T DATA SYMBOLS
SA
IDLE
LN
SOI
= [ NO TRANSITIONS ]
= [ 1 0 1 0 ... ] 62 BITS LONG
= [ 1 1 ] WITH NO MID BIT
TRANSITION
= [ DATA ]
= [ 1 1 ]
SOI
DA, SA, LN, LLC DATA, FCS
SFD
PREAMBLE
IDLE
BEFORE / AFTER
MANCHESTER
ENCODING
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 842225 REV A1 | 制造商:Aavid Thermalloy 功能描述:- Bulk |
| 84222C | 功能描述:固定電感器 2.2uH 2.0A Mini SMT Power RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| 8422303301B | 制造商:ESSEX 功能描述:SPDT 277V. COIL ENCLOSED RELAY |
| 84223C | 功能描述:固定電感器 22uH 0.6A Mini SMT Power RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
| 84224C | 功能描述:固定電感器 220uH 0.2A Mini SMT Power RoHS:否 制造商:AVX 電感:10 uH 容差:20 % 最大直流電流:1 A 最大直流電阻:0.075 Ohms 工作溫度范圍:- 40 C to + 85 C 自諧振頻率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接類型:SMD/SMT 封裝 / 箱體:6.6 mm x 4.45 mm |
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