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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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FALXT972MCCA4 датащи(PDF) 36 Page - Intel Corporation |
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FALXT972MCCA4 датащи(HTML) 36 Page - Intel Corporation |
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36 / 92 page  Intel ® LXT972M Single-Port 10/100 Mbps PHY Transceiver 36 Datasheet Document Number: 302875-005 Revision Date: 27-Oct-2005 5.6 MII Operation This section includes the following topics: • Section 5.6.1, “MII Clocks” • Section 5.6.2, “Transmit Enable” • Section 5.6.3, “Receive Data Valid” • Section 5.6.4, “Carrier Sense” • Section 5.6.5, “Error Signals” • Section 5.6.6, “Collision” • Section 5.6.7, “Loopback” The LXT972M Transceiver implements the Media Independent Interface (MII) as defined by the IEEE 802.3 standard. Separate channels are provided for transmitting data from the MAC to the LXT972M Transceiver (TXD), and for passing data received from the line (RXD) to the MAC. Each channel has its own clock, data bus, and control signals. The following signals are used to pass received data to the MAC: • COL • CRS • RX_CLK • RX_DV • RX_ER • RXD[3:0] The following signals are used to transmit data from the MAC: • TX_CLK • TX_EN • TXD[3:0] The LXT972M Transceiver supplies both clock signals as well as separate outputs for carrier sense and collision. Data transmission across the MII is normally implemented in 4-bit-wide nibbles. |
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