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參數(shù)資料
| 型號： | KSZ8041FTL-S |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 16/65頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC TXRX PHY 10/100 SGL 48TQFP |
| 標準包裝： | 250 |
| 系列： | * |
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Micrel, Inc.
KSZ8041TL/FTL/MLL
December 2009
23
M9999-120909-1.2
10Base-T Receive
On the receive side, input buffer and level detecting squelch circuits are employed. A differential input receiver circuit and
a PLL performs 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 RX+ and
RX- inputs from falsely trigger the decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming
signal and the KSZ8041TL/FTL/MLL decodes a data frame. The receive clock is kept active during idle periods in
between data reception.
SQE and Jabber Function (10Base-T only)
In 10Base-T operation, a short pulse is put out on the COL pin after each frame is transmitted. This SQE Test is required
as a test of the 10Base-T transmit/receive path. If transmit enable (TXEN) is high for more than 20ms (jabbering), the
10Base-T transmitter is disabled and COL is asserted high. If TXEN is then driven low for more than 250ms, the 10Base-
T transmitter is re-enabled and COL is de-asserted (returns to low).
Auto-Negotiation
The KSZ8041TL/FTL/MLL conforms to the auto-negotiation protocol, defined in Clause 28 of the IEEE 802.3u
specification. Auto-negotiation is enabled by either hardware pin strapping (pin 42) or software (register 0h bit 12).
Auto-negotiation allows unshielded twisted pair (UTP) link partners to select the highest common mode of operation. Link
partners advertise their capabilities to each other, and then compare their own capabilities with those they received from
their link partners. The highest speed and duplex setting that is common to the two link partners is selected as the mode
of operation.
The following list shows the speed and duplex operation mode from highest to lowest.
x
Priority 1: 100Base-TX, full-duplex
x
Priority 2: 100Base-TX, half-duplex
x
Priority 3: 10Base-T, full-duplex
x
Priority 4: 10Base-T, half-duplex
If auto-negotiation is not supported or the KSZ8041TL/FTL/MLL link partner is forced to bypass auto-negotiation, the
KSZ8041TL/FTL/MLL sets its operating mode by observing the signal at its receiver. This is known as parallel detection,
and allows the KSZ8041TL/FTL/MLL to establish link by listening for a fixed signal protocol in the absence of auto-
negotiation advertisement protocol.
The auto-negotiation link up process is shown in the following flow chart.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| KSZ8041MLL | 功能描述:以太網(wǎng) IC 3.3V, 10Base-T/100Base-TX Physical Layer Transceiver with MII Support - 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 |
| KSZ8041MLL TR | 功能描述:以太網(wǎng) IC 3.3V, 10Base-T/100Base-TX Physical Layer Transceiver with MII Support - 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 |
| KSZ8041MLLI | 功能描述:以太網(wǎng) IC 3.3V, 10Base-T/100Base-TX Physical Layer Transceiver with MII support (Industrial grade, 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 |
| KSZ8041MLLI TR | 功能描述:以太網(wǎng) IC 3.3V, 10Base-T/100Base-TX Physical Layer Transceiver with MII support (Industrial grade, 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 |
| KSZ8041MNLU | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:10Base-T/100Base-TX Physical Layer Transceiver |
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