EVB-USB3503

USB3503 USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications PRODUCT FEATURES Datasheet Features      — Port goes into power saving state when no devices are connected downstream — Port is shutdown when port is disabled. — Digital core shut down in Standby Mode   Supports either Single-TT or Multi-TT configurations for Full-Speed and Low-Speed connections. Enhanced configuration options available through serial I2C Slave Port — VID/PID/DID — String Descriptors — Configuration options for Hub.  Internal Default configuration option when serial I2C host not available. MultiTRAKTM  PortMap  PortSwap  PHYBoostTM  USB Port ESD Protection (DP/DM) — ±15kV (air and contact discharge) — IEC 61000-4-2 level 4 ESD protection without external devices Integrated USB 2.0 Compatible 3-Port Hub. HSIC Upstream Port Advanced power saving features — 1 μA Typical Standby Current — Dedicated Transaction Translator per port. — Configurable port mapping and disable sequencing. — Configurable differential intra-pair signal swapping. 25-pin WLCS (1.97mm x 1.97mm Wafer Level Chip Scale) Package - 0.4mm ball pitch Applications The USB3503 is targeted for applications where more than one USB port is required. As mobile devices add more features and the systems become more complex it is necessary to have more than one USB port to take communicate with the internal and peripheral devices.  Mobile Phones  Tablet Computers  Ultra Mobile PCs  Digital Still Cameras  Digital Video Camcorders  Gaming Consoles  PDAs  Portable Media Players  GPS Personal Navigation Devices  Media Players/Viewers — Programmable USB transceiver drive strength for recovering signal integrity  VariSenseTM  flexPWR® Technology — Programmable USB receiver sensitivity — Low current design ideal for battery powered applications — Internal supply switching provides low power modes   External 12, 19.2, 24, 25, 26, 27, 38.4, or 52 MHz clock input Internal 3.3V & 1.2V Voltage Regulators for single supply operation. — External VBAT and 1.8V dual supply input option  Internal Short Circuit protection of USB differential signal pins. SMSC USB3503A Revision 1.1 (02-07-13) DATASHEET USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet Order Number(s): TEMPERATURE RANGE PACKAGE TYPE REEL SIZE USB3503A-1-GL-TR 0C to 70C 25-Ball WLCSP 3000 pieces USB3503AI-1-GL-TR -40C to 85C 25-Ball WLCSP 3000 pieces ORDER NUMBER This product meets the halogen maximum concentration values per IEC61249-2-21 For RoHS compliance and environmental information, please visit www.smsc.com/rohs Please contact your SMSC sales representative for additional documentation related to this product such as application notes, anomaly sheets, and design guidelines. 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 warranted 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 WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Revision 1.1 (02-07-13) 2 DATASHEET SMSC USB3503A USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet Table of Contents Chapter 1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.1 Customer Selectable Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1.1.1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Chapter 2 Acronyms and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.1 Acronyms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2 Reference Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Chapter 3 USB3503 Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3.1 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Signal Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.1 Pin Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.2 I/O Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.3 Reference Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.4 Interrupt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 12 14 14 17 17 18 Chapter 4 Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.1 Operational Mode Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2.1 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3 Hub Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.1 Hub Initialization Stage (Hub.Init) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.2 Hub Wait RefClk Stage (Hub.WaitRef). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.3 Hub Configuration Stage (Hub.Config). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.4 Hub Connect Stage (Hub.Connect) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.5 Hub Communication Stage (Hub.Com) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.6 Hub Mode Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 22 22 22 22 22 22 23 23 23 Chapter 5 Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.1 Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1 Multi/Single TT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 Default Serial Interface Register Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3 Serial Interface Register Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.1 Register 00h: Vendor ID (LSB) - VIDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.2 Register 01h: Vendor ID (MSB) - VIDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.3 Register 02h: Product ID (LSB) - PIDL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.4 Register 03h: Product ID (MSB) - PIDM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.5 Register 04h: Device ID (LSB) - DIDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.6 Register 05h: Device ID (MSB) - DIDM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.7 Register 06h: CONFIG_BYTE_1 - CFG1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.8 Register 07h: Configuration Data Byte 2 - CFG2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.9 Register 08h: Configuration Data Byte 3 - CFG3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.10 Register 09h: Non-Removable Device - NRD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.11 Register 0Ah: Port Disable For Self Powered Operation - PDS . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.12 Register 0Bh: Port Disable For Bus Powered Operation - PDB . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.13 Register 0Ch: Max Power For Self Powered Operation - MAXPS . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.14 Register 0Dh: Max Power For Bus Powered Operation - MAXPB . . . . . . . . . . . . . . . . . . . . . . . . . SMSC USB3503A 3 DATASHEET 25 25 25 28 28 28 28 28 28 29 29 30 30 31 31 32 32 32 Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet 5.3.15 Register 0Eh: Hub Controller Max Current For Self Powered Operation - HCMCS. . . . . . . . . . . . 5.3.16 Register 0Fh: Hub Controller Max Current For Bus Powered Operation - HCMCB . . . . . . . . . . . . 5.3.17 Register 10h: Power-On Time - PWRT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.18 Register 11h: Language ID High - LANGIDH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.19 Register 12h: Language ID Low - LANGIDL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.20 Register 13h: Manufacturer String Length - MFRSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.21 Register 14h: Product String Length - PRDSL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.22 Register 15h: Serial String Length - SERSL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.23 Register 16h-53h: Manufacturer String - MANSTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.24 Register 54h-91h: Product String - PRDSTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.25 Register 92h-CFh: Serial String - SERSTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.26 Register D0: Downstream Battery Charging Enable - BC_EN . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.27 Register E5h: Port Power Status - PRTPWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.28 Register E6h: Over Current Sense Control - OCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.29 Register E7h: Serial Port Interlock Control - SP_ILOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.30 Register E8h: Serial Port Interrupt Status - INT_STATUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.31 Register E9h: Serial Port Interrupt Mask - INT_MASK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.32 Register EEh: Configure Portable Hub - CFGP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.33 Register F4h: Varisense_UP3 - VSNSUP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.34 Register F5h: Varisense_21 - VSNS21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.35 Register F6h: Boost_Up3 - BSTUP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.36 Register F8h: Boost_21 - BST21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.37 Register FAh: Port Swap - PRTSP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.38 Register FBh: Port Remap 12 - PRTR12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.39 Register FCh: Port Remap 34 - PRTR34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.40 Register FFh: Status/Command - STCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 33 33 33 34 34 34 34 34 35 35 35 36 36 37 37 38 39 39 40 40 41 41 42 43 44 Chapter 6 Serial Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 6.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2 Interconnecting the USB3503 to an I2C Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.3 I2C Message format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.3.1 Sequential Access Writes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.3.2 Sequential Access Reads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.3.3 I2C Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 45 46 46 46 47 Chapter 7 USB Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 7.1 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2 Hub Attached as a High-Speed Device (Customer-Configured for Single-TT Support Only) . . . . . . . 7.2.1 Standard Device Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.2 Configuration Descriptor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.3 Interface Descriptor (Single-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.4 Endpoint Descriptor (Single-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3 Hub Attached as a High-Speed Device (Customer-Configured as Multi-TT Capable) . . . . . . . . . . . . 7.3.1 Standard Device Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.2 Configuration Descriptor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.3 Interface Descriptor (Single-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.4 Endpoint Descriptor (Single-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.5 Interface Descriptor (Multi-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.6 Endpoint Descriptor (Multi-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.4 Class-Specific Hub Descriptor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5 String Descriptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5.1 String Descriptor Zero (specifies languages supported) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMSC USB3503A 4 DATASHEET 49 49 49 50 51 52 52 52 53 54 55 55 56 56 59 59 Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet 7.5.2 String Descriptor 1 (Manufacturer String). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 7.5.3 String Descriptor 2 (Product String) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 7.5.4 String Descriptor 3 (Serial String). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Chapter 8 Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 8.1 Downstream Port Battery Charging Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.1 USB Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.2 Special Behavior of PRTPWR Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.3 Battery Charging Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 61 61 62 Chapter 9 Integrated Power Regulators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 9.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1.1 3.3V Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1.2 1.2V Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2 Power Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2.1 Single Supply Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2.1.1 VBAT Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2.1.2 3.3V Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2.2 Double Supply Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2.2.1 VBAT + 1.8V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.2.2.2 3.3V + 1.8V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.3 Regulator Control Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 63 63 63 63 63 63 63 63 64 64 Chapter 10 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 10.1 Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.2 Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.3 Operating Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.4 DC Characteristics: Digital I/O Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5 DC Characteristics: Analog I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.6 Dynamic Characteristics: Digital I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.7 Dynamic Characteristics: Analog I/O Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.8 Regulator Output Voltages and Capacitor Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.9 ESD and Latch-Up Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.10 ESD Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.10.1 Human Body Model (HBM) Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.10.2 EN 61000-4-2 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.10.3 Air Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.10.4 Contact Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.1 REFCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.2 Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.4 USB 2.0 HSIC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 65 66 68 69 70 70 71 71 72 72 72 72 72 73 73 73 73 73 Chapter 11 Application Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 11.1 Application Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 Chapter 12 Package Outlines, Tape & Reel Drawings, Package Marking . . . . . . . . . . . . . . 77 Chapter 13 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 SMSC USB3503A 5 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet List of Figures Figure 1.1 Figure 3.1 Figure 3.2 Figure 4.1 Figure 4.2 Figure 6.1 Figure 6.2 Figure 6.3 Figure 6.4 Figure 8.1 Figure 11.1 Figure 11.2 Figure 12.1 Figure 12.2 Figure 12.3 Figure 12.4 Figure 12.5 Figure 12.6 USB3503 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . USB3503 25-Ball Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INT_N Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modes of Operation Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Timing Diagram for Hub Stages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I2C Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I2C Sequential Access Write Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sequential Access Read Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I2C Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery Charging External Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internal Chip-to-Chip Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internal Chip-to-Chip Interface with Embedded Host Port . . . . . . . . . . . . . . . . . . . . . . . . . . . WLCSP25, 1.97x1.97mm Body, 0.4mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WLCSP25, Tape and Reel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WLCSP25, Reel Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WLCSP25, Tape Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reflow Profile and Critical Parameters for Lead-free (SnAgCu) Solder. . . . . . . . . . . . . . . . . Package Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMSC USB3503A 6 DATASHEET 10 12 18 21 24 45 46 47 47 61 75 76 77 78 79 80 80 81 Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet List of Tables Table 3.1 Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3.2 USB3503 I/O Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3.3 USB3503 Primary Reference Clock Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 3.4 USB3503 Secondary Reference Clock Frequencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 4.1 Controlling Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 4.2 Timing Parameters for Hub Stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 5.1 Transaction Translator Buffer Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 5.2 Serial Interface Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 6.1 I2C Timing Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.1 Device Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.2 Configuration Descriptor (High-Speed, Single-TT Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.3 Interface Descriptor (High-Speed, Single-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.4 Endpoint Descriptor (For Status Change Endpoint, Single-TT). . . . . . . . . . . . . . . . . . . . . . . . Table 7.5 Device Descriptor (High-Speed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.6 Configuration Descriptor (High-Speed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.7 Interface Descriptor (High-Speed, Single-TT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.8 Endpoint Descriptor (For Status Change Endpoint, Single-TT). . . . . . . . . . . . . . . . . . . . . . . . Table 7.9 Interface Descriptor (Multi-TT, High-Speed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.10 EndPoint Descriptor (For Status Change Endpoint, Multi-TT). . . . . . . . . . . . . . . . . . . . . . . . . Table 7.11 Class-Specific Hub Descriptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.12 String Descriptor Zero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.13 String Descriptor 1, Manufacturer String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.14 String Descriptor 2, Product String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 7.15 String Descriptor 3, Serial String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.2 Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.3 Operating Current (Dual Supply) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.4 Operating Current (Single Supply). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.5 Digital I/O Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.6 DC Characteristics: Analog I/O Pins (DP/DM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.7 Dynamic Characteristics: Digital I/O Pins (RESET_N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.8 Dynamic Characteristics: Analog I/O Pins (DP/DM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.9 Regulator Output Voltages and Capacitor Requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 10.10ESD and Latch-up Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 11.1 Component Values in Application Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 11.2 Capacitance Values at VBUS of USB Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Table 13.1 Customer Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMSC USB3503A 7 DATASHEET 14 17 17 18 20 24 25 26 47 49 50 51 52 52 53 54 55 55 56 56 59 59 59 60 65 65 66 67 68 69 70 70 71 71 74 74 82 Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet Chapter 1 General Description The SMSC USB3503 is a low-power, USB 2.0 hub controller with HSIC upstream connectivity and three USB 2.0 downtream ports. The USB3503 operates as a hi-speed hub and supports low-speed, full-speed, and hi-speed downstream devices on all of the enabled downstream ports. The USB3503 has been specifically optimized for mobile embedded applications. The pin-count has been reduced by optimizing the USB3503 for mobile battery-powered embedded systems where power consumption, small package size, and minimal BOM are critical design requirements. Standby mode power has been minimized. Instead of a dedicated crystal, reference clock inputs are aligned to mobile applications. Flexible integrated power regulators ease integration into battery powered devices. All required resistors on the USB ports are integrated into the hub. This includes all series termination resistors on D+ and D– pins and all required pull-down resistors on D+ and D– pins. The USB3503 includes programmable features such as: MultiTRAKTM Technology, which utilizes a dedicated Transaction Translator (TT) per port to maintain consistent full-speed data throughput regardless of the number of active downstream connections. MultiTRAKTM outperforms conventional USB 2.0 hubs with a single TT in USB full-speed data transfers. PortMap, which provides flexible port mapping and disable sequences. The downstream ports of a USB3503 hub can be reordered or disabled in any sequence to support multiple platform designs with minimum effort. For any port that is disabled, the USB3503 hub controllers automatically reorder the remaining ports to match the USB host controller’s port numbering scheme. PortSwap, which adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment of USB signals (D+/D-) to connectors to avoid uneven trace length or crossing of the USB differential signals on the PCB. PHYBoost, which provides programmable levels of Hi-Speed USB signal drive strength in the downstream port transceivers. PHYBoost attempts to restore USB signal integrity in a compromised system environment. The graphic on the right shows an example of HiSpeed USB eye diagrams before and after PHYBoost signal integrity restoration. VariSense, which controls the USB receiver sensitivity enabling programmable levels of USB signal receive sensitivity. This capability allows operation in a sub-optimal system environment, such as when a captive USB cable is used. SMSC USB3503A 8 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet 1.1 Customer Selectable Features A default configuration is available in the USB3503 following a reset. This configuration may be sufficient for most applications. The USB3503 hub may also be configured by an external microcontroller. When using the microcontroller interface, the hub appears as an I2C slave device. The USB3503 hub supports customer selectable features including:  Optional customer configuration via I2C.  Supports compound devices on a port-by-port basis.  Customizable vendor ID, product ID, and device ID.  Configurable downstream port power-on time reported to the host.  Supports indication of the maximum current that the hub consumes from the USB upstream port.  Supports Indication of the maximum current required for the hub controller.  Configurable as a either a Self-Powered or Bus-Powered Hub  Supports custom string descriptors (up to 30 characters): — Product string — Manufacturer string — Serial number string  SMSC USB3503A When available, I2C configurable options for default configuration may include: — Downstream ports as non-removable ports — Downstream ports as disabled ports — USB signal drive strength — USB receiver sensitivity — USB differential pair pin location 9 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet 1.1.1 Block Diagram RESET_N Mode Control Standby Hub Mode Upstream HSIC Port VBAT Upstream HSIC To I2C Master VDD_CORE_REG VDD12_BYP VDD33_BYP 3.3V Reg 1.2V Reg SDA Serial Interface SIE Repeater TT #1 TT #2 SCL INT_N Controller TT #3 Port Controller Routing & Port Re-Ordering Logic PHY#3 PHY#2 PHY#1 PLL USB Data Downstream USB Data USB Data Downstream Downstream REF_CLK HUB_CONNECT Figure 1.1 USB3503 Block Diagram SMSC USB3503A 10 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet Chapter 2 Acronyms and Definitions 2.1 Acronyms EP: Endpoint FS: Full-Speed HS: Hi-Speed I2C®: Inter-Integrated Circuit1 LS: Low-Speed HSIC: High-Speed Inter-Chip 2.2 Reference Documents 1. USB Engineering Change Notice dated December 29th, 2004, UNICODE UTF-16LE For String Descriptors. 2. Universal Serial Bus Specification, Revision 2.0, Dated April 27th, 2000. 3. Battery Charging Specification, Revision 1.1, Release Candidate 10, Dated Sept. 22, 2008 4. High-Speed Inter-Chip USB Electrical Specification, Version 1.0, Dated Sept. 23, 2007 SMSC MAKES NO WARRANTIES, EXPRESS, IMPLIED, OR STATUTORY, IN REGARD TO INFRINGEMENT OR OTHER VIOLATION OF INTELLECTUAL PROPERTY RIGHTS. SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES AGAINST INFRINGEMENT AND THE LIKE. No license is granted by SMSC expressly, by implication, by estoppel or otherwise, under any patent, trademark, copyright, mask work right, trade secret, or other intellectual property right. **To obtain this software program the appropriate SMSC Software License Agreement must be executed and in effect. Forms of these Software License Agreements may be obtained by contacting SMSC. 1. I2C is a registered trademark of Philips Corporation. SMSC USB3503A 11 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet Chapter 3 USB3503 Pin Definitions 3.1 Pin Configuration The illustration below shows the package diagram. 1 2 3 4 5 A B C D E TOP VIEW Figure 3.1 USB3503 25-Ball Package 3.2 Signal Definitions WLCSP PIN NAME DESCRIPTION E2 DATA E1 STROBE A5 VDD33_BYP C4 PRTPWR Port Power Control Output B4 OCS_N Over Current Sense Input A1 USBDN1_DP SMSC USB3503A Upstream HSIC DATA pin of the USB Interface Upstream HSIC STROBE pin of the USB Interface 3.3 V Regulator Bypass USB downstream Port 1 D+ data pin 12 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet WLCSP PIN NAME DESCRIPTION B1 USBDN1_DM USB downstream Port 1 D- data pin C2 USBDN2_DP USB downstream Port 2 D+ data pin D2 USBDN2_DM USB downstream Port 2 D- data pin C1 USBDN3_DP USB downstream Port 3 D+ data pin D1 USBDN3_DM USB downstream Port 3 D- data pin E5 SCL I2C clock input D5 SDA I2C bi-directional data pin E3 RESET_N B5 HUB_CONNECT C5 INT_N D4 REF_SEL1 Reference Clock Select 1 input E4 REF_SEL0 Reference Clock Select 0 input B3 REFCLK A4 RBIAS Bias Resistor pin D3 VDD12_BYP 1.2 V Regulator A2 VDD33_BYP 3.3 V Regulator B2 VBAT A3 VDD_CORE_REG C3 VSS SMSC USB3503A Active low reset signal Hub Connect Active low interrupt signal Reference Clock input Voltage input from the battery supply Power supply input to 1.2V regulator for digital logic core Ground 13 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet 3.3 Pin Descriptions This section provides a detailed description of each signal. The signals are arranged in functional groups according to their associated interface. The terms assertion and negation are used. This is done to avoid confusion when working with a mixture of “active low” and “active high” signal. The term “assert”, or “assertion” indicates that a signal is active, independent of whether that level is represented by a high or low voltage. The term “negate”, or “negation” indicates that a signal is inactive. 3.3.1 Pin Definition Table 3.1 Pin Descriptions NAME SYMBOL TYPE DESCRIPTION UPSTREAM HIGH SPEED INTER-CHIP INTERFACE HSIC Clock/Strobe STROBE I/O HSIC Upstream Hub Strobe pin HSIC Data DATA I/O HSIC Upstream Hub Data pin High-Speed USB Data & Port Disable Strap Option USBDN_DP[2:1] & USBDN_DM[2:1] A-I/O These pins connect to the downstream USB peripheral devices attached to the hub’s ports Downstream Port Disable Strap option: This pin will be sampled at RESET_N negation to determine if the port is disabled. Both USB data pins for the corresponding port must be tied to VDD33_BYP to disable the associated downstream port. HS USB Data USBDN_DP[3] & USBDN_DM[3] A-I/O These pins connect to the downstream USB peripheral devices attached to the hub’s ports. There is no downstream Port Disable Strap option on these ports. SERIAL PORT INTERFACE Serial Data SDA I/OD Serial Clock SCL I SMSC USB3503A I2C Serial Data Serial Clock (SCL) 14 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet Table 3.1 Pin Descriptions (continued) NAME SYMBOL TYPE DESCRIPTION Interrupt INT_N OD Interrupt The function of this pin is determined by the setting in the CFGP.INTSUSP configuration register. When CFGP.INTSUSP = 0 (General Interrupt) A transition from high to low identifies when one of the interrupt enabled status registers has been updated. SOC must update the Serial Port Interrupt Status Register to reset the interrupt pin high. When CFGP.INTSUSP = 1 (Suspend Interrupt) Indicates USB state of the hub. ‘Asserted’ low = Unconfigured or configured and in USB Suspend ‘Negated’ high = Hub is configured, and is active (i.e., not in suspend) If unused, this pin must be tied to VDD33_BYP. Over Current Sense OCS_N I Over Current Sense - Input from external current monitor indicating an over-current condition on port 3 or on ganged supply. Negated High = No over current fault detected Asserted Low = Over Current Fault Reported Port Power PRTPWR OD Port Power Control- Enables power to USB peripheral devices downstream on port 3 or on ganged supply. Asserted High = External Device should provide power for port(s). Negated Low = External Device should disable power to port(s). MISC Reference Clock Input REFCLK I Reference clock input. Reference Clock Select REF_SEL[1:0] I The reference select input must be set to correspond to the frequency applied to the REFCLK input. The customer should tie these pins to ground or VDD33_BYP. This input is latched during HUB.Init stage. Selects input reference clock frequency per Table 3.3. SMSC USB3503A 15 DATASHEET Revision 1.1 (02-07-13) USB 2.0 HSIC High-Speed Hub Controller Optimized for Portable Applications Datasheet Table 3.1 Pin Descriptions (continued) NAME SYMBOL TYPE RESET Input RESET_N I USB Transceiver Bias RBIAS A-I/O Hub Connect HUB_CONNECT I DESCRIPTION This active low signal is used by the system to reset the chip and hold the chip in low power STANDBY MODE. A 12.0kΩ (+/- 1%) resistor is attached from ground to this pin to set the transceiver’s internal bias settings. Hub will transition to the Hub Communication Stage when this pin is asserted high. It can be used in three different ways: Tied to Ground - Hub will not transition to the Hub Communication Stage until connect_n bit of the SP_ILOCK register is negated. Tied to VDD33_BYP - Hub will automatically transition to the Hub Communication Stage regardless of the setting of the connect_n bit and without pausing for the SOC to reference status registers. Transition from low to high - Hub will transition to the Hub Communication Stage after this pin transitions from low to high. HUB_CONNECT should never be driven high when USB3503 is in Standby Mode. POWER 1.2V VDD Power VDD12_BYP Power 1.2 V Regulator. A 1.0 μF (