EVB8740/EVB8741 Evaluation Board User Manual
Contents
1. SMSC EVB8740 EVB8741 5 USER MANUAL Revision 1 0 04 29 13 EVB8740 EVB8741 Evaluation Board User Manual 2 2 3 nINT TXER TXD4 Pin Configuration nINTSEL The nINT TXER and TXD4 functions share a common LAN8740A LAN8741A pin This pin can operate in two functional modes nINT Interrupt Mode and TXER TXD4 Mode TXER is also used in EEE mode as TXER when TXEN 1 and LPI when TXEN 0 The nINTSEL configuration strap is used to select one of these two modes The EVB8740 EVB8741 must be properly configured for each mode as follows nINT Mode Depopulate R46 Depopulate the 2 3 positions of JP3 and JP4 Populate the 1 2 positions of JP3 and JP4 to pull up the nINTSEL strap nINT mode TXER TXD4 Mode Default EVB8740 EVB8741 Mode Depopulate the 1 2 positions of JP3 and JP4 Populate the 2 3 positions of JP3 and JP4 to pull down the nINTSEL strap TXER TXD4 mode Populate R46 Note The niINTSEL configuration strap shares functionality with LED2 Therefore LED2 may function active high or active low depending on the nINTSEL configuration For additional information on the functionality of the nINT TXER TXD4 and LED2 nINTSEL pins refer to the LAN8740A LAN8741A Datasheet and LAN8740A LAN8741A schematics 2 2 4 Internal 1 2V Regulator Configuration REGOFF The LAN8740A LAN8741A provides the ability to disable the internal 1 2V regulator When the regulator is disabled an external 1 2V must be sup2. 0 EVB8741 Mechanicals Revision 1 0 04 29 13 10 SMSC EVB8740 EVB8741 USER MANUAL 3 User Manual Revision History EVB8740 EVB8741 Evaluation Board User Manual Table 3 1 Customer Revision History REVISION LEVEL amp DATE SECTION FIGURE ENTRY CORRECTION Rev 1 0 04 29 13 All Initial release SMSC EVB8740 EVB8741 11 USER MANUAL Revision 1 0 04 29 13 Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery amp Lifecycle Information Microchip EVB8740
3. 29 13 4 SMSC EVB8740 EVB8741 USER MANUAL EVB8740 EVB8741 Evaluation Board User Manual Table 2 1 PHYAD 2 0 Resistor Configuration continued PHYAD 2 0 PULL UP DOWN RESISTORS PHYAD 2 0 PHYAD2 PHYAD1 PHYADO R26 R35 R25 R36 R24 R37 110 Populate Populate Populate 111 Populate Populate Populate 2 2 2 Reset Mode Configuration The EVB8740 EVB8741 can be configured to reset into a specific mode of operation at power up via the MODE 2 0 configuration straps Table 2 2 details the proper configuration required for each mode By default all EVB8740 EVB8741 MODE 2 0 straps are configured to a value of 1 Note For additional details on each mode of operation refer to the LAN8740A LAN8741A datasheet Table 2 2 MODE 2 0 Resistor Configuration MODE 2 0 PULL UP DOWN RESISTORS MODE 2 0 MODE2 MODE1 MODE0 R28 R33 R29 R32 R30 R31 000 Populate Populate Populate 10BASE T Half Duplex Auto neg disabled 001 Populate Populate Populate 10BASE T Full Duplex Auto neg disabled 010 Populate Populate Populate 100BASE TX Half Duplex Auto neg disabled 011 Populate Populate Populate 100BASE TX Full Duplex Auto neg disabled 100 Populate Populate Populate 100BASE TX Half Duplex Auto neg enabled 101 Populate Populate Populate Repeater mode 110 Populate Populate Populate Power Down mode 111 Default Populate Populate Populate All capable Auto neg enabled
4. SsmscC SUCCESS BY DESIGN MICROCHIP EVB8740 EVB8741 Evaluation Board User Manual my TUE ASSY 6695 REV A If MH uuy Copyright 2013 SMSC or its subsidiaries All rights reserved Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications Consequently complete information sufficient for construction purposes is not necessarily given Although the information has been checked and is believed to be accurate no responsibility is assumed for inaccuracies SMSC reserves the right to make changes to specifications and product descriptions at any time without notice Contact your local SMSC sales office to obtain the latest specifications before placing your product order The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC s standard Terms of Sale Agreement dated before the date of your order the Terms of Sale Agreement The product may contain design defects or errors known as anomalies which may cause the product s functions to deviate from published specifications Anomaly sheets are available upon request SMSC products are not designed intended authorized or wa
5. WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES SMSC EVB8740 EVB8741 Revision 1 0 04 29 13 USER MANUAL EVB8740 EVB8741 Evaluation Board User Manual 1 Introduction 1 1 The LAN8740A LAN8741A is a low power 10BASE T 100BASE TX physical layer PHY transceiver with variable I O voltage that is compliant with the IEEE 802 3 802 3u and 802 3az Energy Efficient Ethernet standards Energy Efficient Ethernet EEE support results in significant power savings during low link utilizations The EVB8740 EVB8741 is a PHY Evaluation Board EVB that interfaces a Media Independent Interface MII MAC controller to the LAN8740A LAN8741A Ethernet MII PHY via a standard 40 pin MII connector The LAN8740A LAN8741A is connected to an RJ45 Ethernet jack with integrated magnetics for 10 100 connectivity A simplified block diagram of the EVB8740 EVB8741 can be seen in Figure 1 1 MIl Ethernet EVB8740 EVB8741 Figure 1 1 EVB8740 EVB8741 Block Diagram Note Though the LAN8740A LAN8741A_ supports an RMII mode of operation the EVB8740 EVB8741 evaluation board does not support this mode References Concepts and material available in the following documents may be helpful when reading this document Visit www smsc com for the latest documentation SMSC LAN8740A LAN8741A Datasheets AN 25 3 Migrating from the LAN8710A LAN8720A to the LAN8740 LAN8741 LAN8742 AN 8 13 Suggested Magnetics SMSC LAN8740A LAN8741A Eval
6. ding on the configured mode nINT or TXER TXD4 R46 must be depopulated or populated Refer to Section 2 2 3 nINT TXER TXD4 Pin Configuration nINTSEL on page 6 for additional information Revision 1 0 04 29 13 USER MANUAL SMSC EVB8740 EVB8741 EVB8740 EVB8741 Evaluation Board User Manual Table 2 7 P1 40 Pin Female MII Connector Pinout PIN DESCRIPTION PIN DESCRIPTION PIN DESCRIPTION PIN DESCRIPTION 1 5V 11 TXER Note 2 5 21 5V 31 GND 2 MDIO 12 TXCLK 22 GND 32 GND 3 MDC 13 TXEN 23 GND 33 GND 4 RXD3 14 TXDO 24 GND 34 GND 5 RXD2 15 TXD1 25 GND 35 GND 6 RXD1 16 TXD2 26 GND 36 GND 7 RXDO 17 TXD3 27 GND 37 GND 8 RXDV 18 COL 28 GND 38 GND 9 RXCLK 19 CRS 29 GND 39 GND 10 RXER 20 5V 30 GND 40 5V Note 2 5 To use the TXER signal from the MAC the nINT TXER TXD4 pin and R46 must be configured properly Refer to Section 2 2 3 nINT TXER TXD4 Pin Configuration nINTSEL on page 6 for additional information 2 2 9 Switches Table 2 8 Switches SWITCH DESCRIPTION FUNCTION S1 Reset switch When pressed triggers a board reset SMSC EVB8740 EVB8741 USER MANUAL 9 Revision 1 0 04 29 13 EVB8740 EVB8741 Evaluation Board User Manual 2 3 Mechanicals Figure 2 2 details the EVB8740 EVB8741 mechanical dimensions 0 175 0 200 0 125 a D lt TOP VIEW 0 125 ys 0 200 0 175 kG 3 000 Figure 2 2 EVB874
7. e internal 1 2V regulator is disabled In this case an external 1 2V regulator must be supplied to test point TP3 Note 2 2 The LAN8740A LAN8741A s VDDIO power may be supplied externally at a voltage other than 3 3V as described in Section 2 1 Power on page 3 SMSC EVB8740 EVB8741 7 Revision 1 0 04 29 13 USER MANUAL EVB8740 EVB8741 Evaluation Board User Manual 2 2 8 System Connections Table 2 5 System Connections PLUG HEADER DESCRIPTION PART T1 RJ45 with Integrated LEDs Pulse J0011D01BNL J1 RT IR Adam Tech PH2 28 U A Note Refer Table 2 6 to for a full pin list Py 40 pin Female MII Connector E Tyco 5173278 2 Note Refer Table 2 7 to for a full pin list Table 2 6 J1 2x14 MII Header Pinout HEADER HEADER PIN DESCRIPTION PIN DESCRIPTION 1 nRST 15 TXD1 2 MDIO Note 2 3 16 TXD2 3 MDC 17 TXD3 4 RXD3 PHYAD2 18 CRS_DV COL MODE2 5 RXD2 RMIISEL 19 CRS 6 RXD1 MODE1 20 Ground 7 RXD0 MODEO 21 nINT Note 2 4 8 RXDV 22 VDDIO 9 RXCLK PHYAD1 23 3 3V 10 RXER RXD4 PHYADO 24 Ground 11 TXER TXD4 Note 2 4 25 Ground 12 TXCLK 26 Ground 13 TXEN 27 Ground 14 TXDO 28 Ground Note 2 3 Resistor R11 acts as a pull up on the MDIO pin In most situations the MAC circuitry provides this pull up and R11 is not required Note 2 4 Pins 11 and 21 of the J1 header must be configured to properly connect to the nINT TXER TXD4 pin of the LAN8740A LAN8741A Depen
8. on REGOFF on page 6 for additional information SMSC EVB8740 EVB8741 3 Revision 1 0 04 29 13 USER MANUAL EVB8740 EVB8741 Evaluation Board User Manual 2 2 Configuration The following sub sections describe the various board features and configuration settings A top view of the EVB8740 EVB8741 is shown in Figure 2 1 40 pin MII MII VDDCR Reset JP1 JP4 Integrated connector Testpoints Testpoint Button RJ45 P1 Magnetics EJ o aN E j CEE isos ws SPEED amp LINK ACT LEDs integrated in magjack VDDIO 5V GND AVDD_ETH Testpoint Testpoint Testpoint Testpoint Figure 2 1 Top View of the EVB8740 EVB8741 SMSC LAN8740A LAN8741A 3 3V Testpoint 2 2 1 PHY Address Configuration The EVB8740 EVB8741 allows the user to configure the default PHY address at power up via the PHYAD 2 0 configuration straps Table 2 1 details the proper configuration required for each PHY address value By default all EVB8740 EVB8741 PHY address straps are configured to a value of 0 Table 2 1 PHYAD 2 0 Resistor Configuration PHYAD 2 0 PULL UP DOWN RESISTORS PHYAD 2 0 PHYAD2 PHYAD1 PHYADO R26 R35 R25 R36 R24 R37 000 Default Populate Populate Populate 001 Populate Populate Populate 010 Populate Populate Populate 011 Populate Populate Populate 100 Populate Populate Populate 101 Populate Populate Populate Revision 1 0 04
9. plied to the VDDCR pin via TP3 Configuration of the internal regulator is controlled by the REGOFF configuration strap The EVB8740 EVB8741 must be properly configured for each mode as follows Internal 1 2V Regulator Enabled Default EVB8740 EVB8741 Mode Depopulate the 2 3 positions of JP1 and JP2 Populate the 1 2 positions of JP1 and JP2 to pull down the REGOFF strap enable regulator Internal 1 2V Regulator Disabled Depopulate the 1 2 positions of JP1 and JP2 Populate the 2 3 positions of JP1 and JP2 to pull up the REGOFF strap disable regulator Note The REGOFF configuration strap shares functionality with LED1 Therefore LED1 may function active high or active low depending on the REGOFF configuration For additional information on the LED1 REGOFF pin and the disabling of the internal 1 2V regulator power sequencing requirements etc refer to the LAN8740A LAN8741A Datasheet and LAN8740A LAN8741A schematics 2 2 5 Clock Configuration The EVB8740 EVB8741 can be clocked via the onboard crystal oscillator or an optional external clock Crystal Oscillator Default The 25 MHz crystal Y1 is connected to the internal oscillator of the LAN8740A LAN8741A A PLL circuit in the LAN8740A LAN8741A generates all the timing required by the PHY Revision 1 0 04 29 13 6 SMSC EVB8740 EVB8741 USER MANUAL EVB8740 EVB8741 Evaluation Board User Manual External Clock The EVB8740 EVB8741 can be configured to use an exte
10. rnal clock by removing crystal Y1 and resistor R20 A 25MHz 3 3V signal may then be applied to pin 1 of Y1 which connects to pin 5 of the LAN8740A LAN8741A Pin 2 of Y1 which connects to pin 4 of the LAN8740A LAN8741A should be left floating when using an external clock 2 2 6 LEDs Table 2 3 LEDs REFERENCE COLOR INDICATION Link Activity LEDI Green Active when the PHY has established a valid link with a link partner and blinks when activity is detected Speed i Yellow Active when a 100BASE TX link has been established Inactive when a 10BASE T link has been established or during line isolation Note LED1 and LED2 are located inside the RJ45 connector LED1 and LED2 may function active high or active low depending on the configuration of the REGOFF and nINTSEL straps respectively Refer to the LAN8740A LAN8741A Datasheet and LAN8740A LAN8741A schematics for additional information 2 2 7 Test Points Table 2 4 Test Points TEST POINT DESCRIPTION CONNECTION TP1 3 3V Test Point Orange 3 3V TP2 5 0V Test Point Red 5 0V 1 2V VDDCR Test Point Unpopulated TP3 Note 2 1 1 2V TP4 Ground Test Point Black Ground TP5 VDDIO Test Point Purple 3 3V Note 2 2 TP6 nPME Test Point Unpopulated nPME RXD2 nPME RMIISEL TP7 AVDD Test Point White AVDD TP8 AVDD_ETH Test Point Yellow AVDD_ETH Note 2 1 VDDCR is the internal 1 2V regulated output When REGOFF is enabled th
11. rranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage Any and all such uses without prior written approval of an Officer of SMSC and further testing and or modification will be fully at the risk of the customer Copies of this document or other SMSC literature as well as the Terms of Sale Agreement may be obtained by visiting SMSC s website at http www smsc com SMSC is a registered trademark of Standard Microsystems Corporation SMSC Product names and company names are the trademarks of their respective holders The Microchip name and logo and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U S A and other countries SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE TITLE AND AGAINST INFRINGEMENT AND THE LIKE AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT INCIDENTAL INDIRECT SPECIAL PUNITIVE OR CONSEQUENTIAL DAMAGES OR FOR LOST DATA PROFITS SAVINGS OR REVENUES OF ANY KIND REGARDLESS OF THE FORM OF ACTION WHETHER BASED ON CONTRACT TORT NEGLIGENCE OF SMSC OR OTHERS STRICT LIABILITY BREACH OF WARRANTY OR OTHERWISE WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE AND
12. uation Board Schematics Revision 1 0 04 29 13 2 SMSC EVB8740 EVB8741 USER MANUAL EVB8740 EVB8741 Evaluation Board User Manual 2 Board Details This section includes the following EVB8740 EVB8741 board details Power Configuration Mechanicals 2 1 Power 2 1 1 5V Power Power is normally supplied to the EVB8740 EVB8741 s 3 3V regulator externally via the 5V power pins of the MII connector If desired the EVB8740 EVB8741 can be powered without 5V present on the MII connector by supplying 5V to the TP2 red test point with ground connected to the TP4 black test point Note Before connecting an external power supply to TP2 ensure power is not present on the MII connector s 5V pins Connecting 5V simultaneously via the MII connector and TP2 may result in permanent damage to the board 2 1 2 VDDIO Power The LAN8740A LAN8741A s VDDIO power may be supplied at a voltage other than 3 3V by depopulating resistor R12 and supplying 1 6V to 3 6V externally via test point TP5 purple with ground connected to the TP4 black test point Note Before connecting an external power supply to TP5 ensure that resistor R12 has been removed Connecting an external power supply to TP5 while resistor R12 is populated may result in permanent damage to the board 2 1 3 1 2V Power The LAN8740A LAN8741A s internal 1 2V regulator can be optionally disabled Refer to Section 2 2 4 Internal 1 2V Regulator Configurati
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