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LAN8710A-EZC 데이터시트(PDF) 19 Page - SMSC Corporation |
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LAN8710A-EZC 데이터시트(HTML) 19 Page - SMSC Corporation |
19 / 82 page Small Footprint MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology Datasheet SMSC LAN8710A/LAN8710Ai 19 Revision 1.4 (08-23-12) DATASHEET Chapter 3 Functional Description This chapter provides functional descriptions of the various device features. These features have been categorized into the following sections: Transceiver Auto-negotiation HP Auto-MDIX Support MAC Interface Serial Management Interface (SMI) Interrupt Management Configuration Straps Miscellaneous Functions Application Diagrams 3.1 Transceiver 3.1.1 100BASE-TX Transmit The 100BASE-TX transmit data path is shown in Figure 3.1. Each major block is explained in the following subsections. 3.1.1.1 100BASE-TX Transmit Data Across the MII/RMII Interface For MII, the MAC controller drives the transmit data onto the TXD bus and asserts TXEN to indicate valid data. The data is latched by the transceiver’s MII block on the rising edge of TXCLK. The data is in the form of 4-bit wide 25MHz data. Figure 3.1 100BASE-TX Transmit Data Path MAC Tx Driver MLT-3 Converter NRZI Converter 4B/5B Encoder CAT-5 RJ45 25MHz by 5 bits NRZI MLT-3 MLT-3 MLT-3 Scrambler and PISO MII/RMII 25MHz by 4 bits Ext Ref_CLK (for RMII only) PLL MII 25 Mhz by 4 bits or RMII 50Mhz by 2 bits MLT-3 Magnetics 125 Mbps Serial TX_CLK (for MII only) |
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