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參數(shù)資料
| 型號(hào)： | KSZ8893FQL |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 40/117頁 |
| 文件大小： | 0K |
| 描述： | IC SWITCH FAST ETH 3PORT 128PQFP |
| 標(biāo)準(zhǔn)包裝： | 66 |
| 控制器類型： | 以太網(wǎng)開關(guān)控制器 |
| 接口： | MII，RMII，SNI |
| 電源電壓： | 3.1 V ~ 3.5 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-BFQFP |
| 供應(yīng)商設(shè)備封裝： | 128-PQFP（14x20） |
| 包裝： | 托盤 |
| 配用： | 576-1603-ND - EVAL KIT EXPERIMENTAL KSZ8893MQL |
| 其它名稱： | 576-1565 |
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Micrel, Inc.
KSZ8893FQL
October 2007
29
M9999-101607-1.3
100Base-FX Operation
100Base-FX operation is similar to 100Base-TX operation with the differences being that the scrambler/de-scrambler
and MLT3 encoder/decoder are bypassed on transmission and reception. In addition, auto-negotiation is bypassed and
auto MDI/MDI-X is disabled.
100Base-FX Signal Detection
In 100Base-FX operation, FXSD1 (fiber signal detect), input pin 44, is usually connected to the fiber transceiver SD
(signal detect) output pin. 100Base-FX mode is activated when the FXSD1 input pin is greater than 1V. When FXSD1 is
between 1V and 1.8V, no fiber signal is detected and a far-end fault (FEF) is generated. When FXSD1 is over 2.2V, the
fiber signal is detected.
Alternatively, the designer may choose not to implement the FEF feature. In this case, the FXSD1 input pin is tied high
to force 100Base-FX mode.
100Base-FX signal detection is summarized in the following table:
FXSD1 Input Voltage
Mode
Less than 0.2V
TX mode
Greater than 1V, but less than 1.8V
FX mode
No signal detected
Far-end fault generated
Greater than 2.2V
FX mode
Signal detected
Table 5. FX and TX Mode Selection
To ensure proper operation, a resistive voltage divider is recommended to adjust the fiber transceiver SD output voltage
swing to match the FXSD1 pin’s input voltage threshold.
100Base-FX Far-End Fault
A far-end fault (FEF) occurs when the signal detection is logically false on the receive side of the fiber transceiver. The
KSZ8893FQL detects a FEF when its FXSD1 input is between 1V and 1.8V. When a FEF is detected, the
KSZ8893FQL signals its fiber link partner that a FEF has occurred by sending 84 1’s followed by a zero in the idle
period between frames.
By default, FEF is enabled. FEF can be disabled through register setting.
10Base-T Transmit
The 10Base-T driver is incorporated with the 100Base-TX driver to allow for transmission using the same magnetics.
They are internally wave-shaped and pre-emphasized into outputs with typical 2.3V amplitude. The harmonic contents
are at least 27dB below the fundamental frequency when driven by an all-ones Manchester-encoded signal.
10Base-T Receive
On the receive side, input buffers and level detecting squelch circuits are employed. A differential input receiver circuit
and a phase-locked loop (PLL) perform the decoding function. The Manchester-encoded data stream is separated into
clock signal and NRZ data. A squelch circuit rejects signals with levels less than 400mV or with short pulse widths to
prevent noise at the RXP-or-RXM input from falsely triggering the decoder. When the input exceeds the squelch limit,
the PLL locks onto the incoming signal and the KSZ8893FQL decodes a data frame. The receiver clock is maintained
active during idle periods in between data reception.
Fiber LED Driver
The device provides a current mode fiber LED driver. The edge enhanced current mode does not require any output
wave shaping. The drive current of the fiber LED driver is programmable thru register 138 (0x8A) bit[7:6]. The
programmable current values are as follow:
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8893FQL-EVAL | 功能描述:以太網(wǎng)開發(fā)工具 2+1 Port 10/100 Switch w/Tranceivers & Frame Buffers - Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評(píng)估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
| KSZ8893FQL-FX | 功能描述:以太網(wǎng) IC 2+1 Port 10/100 Switch w/Tranceivers & Frame Buffers, (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8893FQLI-FX | 功能描述:以太網(wǎng) IC 3-Port Ethernet Switch w MII/RMII Interface + 100FX (I-Temp, Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8893MBL | 功能描述:以太網(wǎng) IC 2+1 Port 10/100 Switch w/Tranceivers & Frame Buffers, 128-Ld PQFP(Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
| KSZ8893MBL TR | 功能描述:以太網(wǎng) IC 2+1 Port 10/100 Switch w/Tranceivers & Frame Buffers, 100-Ball LFBGA (Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray |
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