EVB-USB5537

EVB-USB5537 SMSC | Alldatasheet

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Copyright © 2011 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 no t necessarily given. Although the informati on 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 c onditional 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 orde r (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 pub lished specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life suppor t 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 app roval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the custom er. Copies of this document or other SMSC literature, as wel l 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. SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDI NG 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 DEALIN G 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 WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EVB-USB5537 Evaluation Bo ard Revision C User Manual

EVB-USB5537 Evaluation Board Revision C User Manual PRELIMINARY USER MANUAL Chapter 1 Overview solution. The hub is fu lly compliant with the USB 3.0 USB Specification and supports SuperSpeed (SS), Hi-Speed (HS), Full-Speed (FS), and Low-Speed (LS) USB signalling for complete coverage of all defined USB operating speeds. Additionally, it provides an upstream port compliant to both the USB 2.0 and 3.0 specifications. All seve n of the downstream ports are USB 2.0 compliant, while four of the downstream ports are also USB 3.0 compliant. All LED and port control signal pins are under firmware control in order to allow for maximum operational flex ibility, and are available as GPIOs for customer- specific use. The EVB-USB5537 demonstrates driver compatibility with Microsoft Windows 7, WinXP, Mac OS X 10.4+ and Linux Hub Drivers.

1.1 Features

„ Features the USB5537 in a 72-pi n QFN RoHS compliant package „ USB 3.0 compliant (SS, HS, FS, and LS operation), USB pins are 5 V tolerant „ One USB 2.0/3.0 upstream hub port „ Self powered operation „ Seven downstream USB 2.0 port s, with four of the downstream ports supporting USB 3.0 „ All downstream ports support individual port power „ Four downstream ports (1-4) support individual over current sense „ Optional onboard SPI Flash for external downloadable firmware „ Low-cost 4-layer space saving design „ Operates from one single voltage (+12.0 V, regulated) 'wall wart' external power supply „ Two GPIO LED indicators (LED0 and LED1) „ Single 25 MHz crystal or external clock input „ Single onboard +3.3 V, 1.5 Amp regulator „ Single onboard +1.2 V, 3 Amp regulator „ +3.3 V and port power LED indicators

1.2 General Description

The EVB-USB5537 is a demonstration and evaluat ion platform featuring the USB5537 Ultra Fast seven port hub on a 4-layer RoHS-compliant print ed circuit board. It supports the legacy USB speeds (HS/FS/LS) through an included USB 2.0 hub controller which operates in parallel with the new SuperSpeed (SS) hub controller. This parallel hub operation keeps the SuperSpeed data transfers from being affected by the slower USB 2. 0 traffic. The USB5537 is configured for operation through internal default settings and supports custom configurations through an opti onal external 8-Mbit SPI Flash device, U9. Figure 1.1 shows the top and bottom level silk screen and copper layer.

EVB-USB5537 Evaluation Board Revision C User Manual PRELIMINARY USER MANUAL Figure 1.1 Top and Bottom Level Silk Screen and Copper Layers

EVB-USB5537 Evaluation Board Revision C User Manual PRELIMINARY USER MANUAL Chapter 2 Getting Started The EVB-USB5537 is configured by internal default registers. In this configuration it operates as a USB 3.0/USB 2.0 hub device with a seven port USB HUB and SMSC’s standard VID/PID/DID settings.

2.1 Configuration

The SMSC EVB-USB5537 is designed fo r flexible configuration solution s. It can be configured with default internal register settings, through downloada ble external firmware to an onboard SPI Flash, or through SMBus.

2.1.1 Configuration Sour ce - Internal Default

When the USB5537 does not detect a valid SPI Fl ash image or SMBus configuration upon power-up, the EVB-USB5537 uses internal default register sett ings. It also sets the Vendor ID, Product ID, Language ID, and Device ID, and additional settings from internal ROM code.

2.1.2 Configuration Source - Ex ternal SPI Flash and SMBus

Upon power-up the USB5537 first looks for an external SPI Flash device. If one is found, the external ROM is enabled and code execution is then initiated from the external SPI device. If a SPI Flash device is not found, the firmware checks to see whether SMBus is enabled. To enable SMBus, pins 2 and 3 must be shorted on the J13 SMBus EN header which pulls SM_CLK high. This header has pins 1 and 2 shorted by default which disables SMBus by pulling SM_CLK low. When SMBus is enabled, the firmware configures the GPIOs to act as an SMBu s slave. As an SMBus slave, the firmware will wait indefinitely for the SMBus configuration. The SMBus can operate in either legacy mode (USB 2.0 only) or advanced mode (access to both USB 2.0 and U SB 3.0 registers). SMBus data and clock can be controlled via the onboard SMBus header, J8. If the SMBus is not enabled, the USB5537 will then look to load the configuration from an external I 2C EEPROM. If no external options are detected, the USB5537 will operate from the internal OTP memory. By default, the SPI Flash chip U9 is populated. The 10 k Ω pull-up resistors R50, R51, and R52 must also be populated. Finally, the 0 Ω resistor R35 must also be populated in order to supply +3.3V to the SPI chip. There is an alternative SPI programmi ng interface available as well that is not populated by default. The SPI chip can be programmed via the 8-pin DIP socket SKT1. When using this programming socket, the SPI Power header J12 must now be populated and the 0 Ω resistor R35 must be removed: the SPI chip is now powered through t he J12 power select header. The default is to have pins 1 and 2 shorted together whic h allows the onboard +3.3 V to power the SPI chip. However, if the SPI chip is being programmed via the SKT1 socket, then the chip should be powered by the programmer. Therefore, pins 2 and 3 should be shor ted together on J12 which passes power from the SPI programmer to the SPI chip instead of using onboard power. If the USB5537 does not detect an SMBu s interface, it will then check for an I 2C EEPROM. For I 2C communciation, the SMBus header J8 can be used to access the SCL and SDA signals on the USB5537. In order to assure pr oper operation, the external 10 k Ω pull-up resistor R44 on SM_DAT must be populated and pins 2 and 3 on the SMBus EN header must be shorted so that SM_CLK has a 10 kΩ pull-up resistor (R53) on it.

2.1.3 Configuration S ource - 25MHz Crystal

By default, a 2 mm x 1.6 mm Murata 25 MHz crystal, Y1, is populated on the evaluation board. External load capacitance is not required when this crystal is used. If a surface mount HCM49 crystal is used on the EVB instead, two 18 pF load capaci tors C71 and C72 must be populated.

EVB-USB5537 Evaluation Board Revision C User Manual PRELIMINARY USER MANUAL

2.1.4 Power Sour ce - Self-Powered

The EVB-USB5537 only supports self-powered operat ion, and is powere d through one +12.0 V regulated 'wall wart' external power supply. The +12.0 V ‘wall wart’ plugs into the 2.5 mm connector J9 on the board. Alternatively, an external voltage can be injected onto the J11 Ext. 12 V header, which is not populated by default. The +12.0 V feeds a 6 A regulator which outputs +5.0 V across the board. This +5.0 V output controls the +3.3 V and +1.3 V onboard regulators.

2.1.5 Downstream Port Power Control

The USB 3.0 downstream port powers (ports 1 through 4) are controlled via two 1 A port power devices (AP2176S) and the USB 2.0 downstream port power s (ports 5 through 7) are controlled via two 500 mA port power devices (MIC2026). The MIC2026 devices, U3 and U4, are permanently enabled through a 10 k Ω pull-up resistor on the Enable input pins. The AP2176S devices, U2 and U6, are enabled via the PRT_CTL[4:1] pins. Downstream ports 1 through 4 have individual over current sensing available and all sensing signals are pulled high to +3.3 V through external 10 k Ω resistors. Downstream ports 5 through 7 have their over curr ent sense signals mux’d with the port power control signals. In order to view over current sensing on the port power signals, the 0 Ω resistors R57, R58, and R59 must be populated. These resistors are not p opulated by default so t hat over current sensing is not possible on the PRT_CTL[7:5] pins. By default, PRT_CTL5 is used as the SM_DAT pin and PRT_CTL[7:6] are floating pins.