EVB8720 SMSC, EVB8720 Datasheet

EVB8720

Manufacturer Part Number

EVB8720

Description

Ethernet Modules & Development Tools LAN8720 Design BRD

Manufacturer

SMSC

Datasheet

1.EVB8720.pdf (12 pages)

Specifications of EVB8720

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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EVB8720 Evaluation Board User Manual

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

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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

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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

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USER MANUAL

SMSC EVB8720

Revision 1.1 (05-24-10)

Related parts for EVB8720

EVB8720 Summary of contents

Page 1

... EVB8720 Evaluation Board User Manual Copyright © 2010 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 ...

Page 2

... LAN8720A is connected to an RJ45 Ethernet jack with integrated magnetics for 10/100 connectivity. A simplified block diagram of the EVB8720 can be seen in Note: Revisions 1.1 and later of the EVB8720 Evaluation Board User Manual pertain to EVB8720 assembly number 6584. For information on the older, discontinued EVB8720 assembly number 7170AZ, refer to revision 1 ...

Page 3

... Power Power is normally supplied to the EVB8720’s +3.3V regulator externally via the +5V power pins of the 40-pin connector. If desired, the EVB8720 can be powered without +5V present on the 40-pin connector (P1) by supplying +5V to the TP2 (red) test point with ground connected to pin 20 of the J1 header ...

Page 4

... Connector Testpoints (P1) +3.3V Testpoint 2.2.1 PHY Address Configuration The EVB8720 allows the user to configure the default PHY address at power-up via the PHYAD[0] configuration strap. Table 2.1 default, PHYAD[0] is configured to a value of “0”. Table 2.1 PHYAD[0] Resistor Configuration PHYAD[0] 0 (Default) 1 Revision 1 ...

Page 5

... EVB8720 Evaluation Board User Manual 2.2.2 Boot Mode Configuration The EVB8720 can be configured to boot into a specific mode of operation at power-up via the MODE[2:0] configuration straps. default, all EVB8720 MODE[2:0] straps are configured to a value of “1”. Note: For additional details on each mode of operation, refer to the LAN8720A datasheet. ...

Page 6

... The nINT and REFCLKO functions share a common LAN8720A pin. This pin can operate in two functional modes: nINT (Interrupt) Mode and REFCLKO Mode. The nINTSEL configuration strap is used to select one of these two modes. Additionally, the EVB8720 allows clock source selection in each mode, resulting in the four modes of operation detailed in Figure via the on-board 50MHz oscillator ...

Page 7

... The LAN8720A provides the ability to disable the internal +1.2V regulator. When the regulator is disabled, an external +1.2V must be supplied to the VDDCR pin (via TP3). Configuration of the internal regulator is controlled by the REGOFF configuration strap. The EVB8720 must be properly configured for each mode as follows: Internal +1 ...

Page 8

... Section 2.1, "Power," on page 3. Table 2.6 System Connections DESCRIPTION Pulse J0011D01BNL Adam Tech PH2-20-U-A Table 2.7 to for a full pin list Tyco 5173278-2 Table 2.8 to for a full pin list USER MANUAL 8 EVB8720 Evaluation Board User Manual CONNECTION (Note 2.3) PART SMSC EVB8720 ...

Page 9

... The functionality of pin 10 depends on the configured mode of operation. Pin 10 will be driven by REFCLKO in the REFCLKO modes of operation. In the nINT on-board 50MHz oscillator mode, pin 10 will be driven by the EVB8720’s on-board 50MHz oscillator. In the nINT off-board 50MHz clock mode, pin 10 is either unconnected (50MHz clock provided by the partner device via the TXCLK pin) or used to provide the 50MHz clock to the CLKIN pin of the LAN8720A ...

Page 10

... The functionality of pin 9 depends on the configured mode of operation. Pin 9 will be driven by REFCLKO in the REFCLKO modes of operation. In the nINT on-board 50MHz oscillator mode, pin 9 will be driven by the EVB8720’s on-board 50MHz oscillator. In the nINT off- board 50MHz clock mode, pin 9 is either unconnected (50MHz clock provided by the partner device via the TXCLK pin) or used to provide the 50MHz clock to the CLKIN pin of the LAN8720A ...

Page 11

... EVB8720 Evaluation Board User Manual 2.3 Mechanicals Figure 2.3 details the EVB8720 mechanical dimensions. SMSC EVB8720 Ø0.125 TOP VIEW Ø0.125 3.000 Figure 2.3 EVB8720 Mechanicals USER MANUAL 11 0.175 0.200 0.200 0.175 Revision 1.1 (05-24-10) ...

Page 12

... Rev. 1.1 All (05-24-10) Rev. 1.0 Initial Release (04-06-09) Revision 1.1 (05-24-10) Table 3.1 Customer Revision History Entire document revised for new EVB version; consistency with latest EVB User Manual layout. USER MANUAL 12 EVB8720 Evaluation Board User Manual CORRECTION SMSC EVB8720 ...

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