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SMSC LAN8710, LAN8710i, MII 10/100, RMII 10/100 8.1Application Diagram, 8.1.1MII Diagram

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MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR® Technology in a Small Footprint

Datasheet

Chapter 8 Application Notes

8.1Application Diagram

The LAN8710 requires few external components. The voltage on the magnetics center tap can range from 2.5 - 3.3V.

8.1.1MII Diagram

LAN8710

10/100 PHY

32-QFN

MII MDIO MII MDC

nINT

MagRJ45

TXD[3:0]	TXP
4	TXN

Interface

TXCLK

TXERRXP

TXEN

RXN

RXD[3:0]

RXCLK

RXDV

XTAL1/CLKIN

25MHz

LED[2:1]

XTAL2

nRST

Figure 8.1 Simplified Application Diagram

SMSC LAN8710/LAN8710i	73	Revision 1.0 (04-15-09)
	DATASHEET

Contents

PRODUCT FEATURES DATASHEET ORDER NUMBER(S): Reel Size is DATASHEET Table of Contents Page Page List of Figures List of Tables Page 1.1General Terms and Conventions 1.2General Description 1.3Architectural Overview 1.3.1Configuration Page 2.1Package Pin-outDiagram and Signal Table Page 3.1MAC Interface Signals Page 3.2LED Signals 3.3Management Signals 3.4General Signals 3.510/100 Line Interface Signals 3.6Analog Reference 3.7Power Signals 4.1Top Level Functional Architecture 4.2100Base-TXTransmit 4.2.1100M Transmit Data Across the MII/RMII Interface 4.2.24B/5B Encoding 4.2.3Scrambling 4.2.4NRZI and MLT3 Encoding 4.2.5100M Transmit Driver 4.2.6100M Phase Lock Loop (PLL) 4.3100Base-TXReceive 4.3.1100M Receive Input 4.3.2Equalizer, Baseline Wander Correction and Clock and Data Recovery 4.3.3NRZI and MLT-3Decoding 4.3.4Descrambling 4.3.5Alignment 4.3.65B/4B Decoding 4.3.7Receive Data Valid Signal 4.410Base-TTransmit 4.4.110M Transmit Data Across the MII/RMII Interface 4.4.2Manchester Encoding 4.4.310M Transmit Drivers 4.510Base-TReceive 4.5.110M Receive Input and Squelch 4.5.2Manchester Decoding 4.5.310M Receive Data Across the MII/RMII Interface 4.5.4Jabber Detection 4.6MAC Interface 4.6.1MII 4.6.2RMII 4.6.3MII vs. RMII Configuration 4.7Auto-negotiation Page 4.7.1Parallel Detection 4.7.2Re-starting Auto-negotiation 4.7.3Disabling Auto-negotiation 4.7.4Half vs. Full Duplex 4.8HP Auto-MDIXSupport 4.9Internal +1.2V Regulator Disable 4.9.1Disable the Internal +1.2V Regulator 4.9.2Enable the Internal +1.2V Regulator 4.10nINTSEL Strapping and LED Polarity Selection 4.11REGOFF and LED Polarity Selection 4.12PHY Address Strapping 4.13Variable Voltage I/O 4.14Transceiver Management Control 4.14.1Serial Management Interface (SMI) Page Page Page Page Page 5.1SMI Register Format Page Page Page Page Page Page Page 5.2Interrupt Management 5.2.1Primary Interrupt System 5.2.2Alternate Interrupt System 5.3Miscellaneous Functions 5.3.1Carrier Sense 5.3.2Collision Detect 5.3.3Isolate Mode 5.3.4Link Integrity Test 5.3.5Power-Downmodes 5.3.6Reset 5.3.7LED Description 5.3.8Loopback Operation 5.3.8.1Near-endLoopback 10/100 XFMR Digital Ethernet Transceiver 5.3.9Configuration Signals 5.3.9.2Mode Bus – MODE[2:0] 5.3.9.3MII/RMII Mode Selection Page 6.1Serial Management Interface (SMI) Timing 6.2MII 10/100Base-TX/RXTimings 6.2.1MII 100Base-TTX/RX Timings 6.2.1.2100M MII Transmit Timing TX_CLK TXD[3:0] TX_EN TX_ER 6.2.2MII 10Base-TTX/RX Timings TX_CLK TXD[3:0] TX_EN 6.3RMII 10/100Base-TX/RXTimings (50MHz REF_CLK IN) 6.3.1RMII 100Base-TTX/RX Timings (50MHz REF_CLK IN) 6.3.1.2100M RMII Transmit Timing (50MHz REF_CLK IN) CLKIN TXD[1:0] Page Page 6.4RMII CLKIN Requirements 6.5Reset Timing 6.6Clock Circuit 7.1DC Characteristics 7.1.1Maximum Guaranteed Ratings 7.1.2Operating Conditions 7.1.3Power Consumption 7.1.4DC Characteristics - Input and Output Buffers Page Page Page 8.1Application Diagram 8.1.1MII Diagram 8.1.2Power Supply Diagram 8.1.3Twisted-PairInterface Diagram 8.2Magnetics Selection