USB251xB/xBi USB 2.0 Hi-Speed Hub Controller PRODUCT FEATURES Datasheet General Description Features The SMSC USB251xB/xBi hub is a family of low-power, configurable, MTT (multi transaction translator) hub controller IC products for embedded USB solutions. The x in the part number indicates the number of downstream ports available, while the B indicates battery charging support. The SMSC hub supports lowspeed, full-speed, and hi-speed (if operating as a hispeed hub) downstream devices on all of the enabled downstream ports. High performance, low-power, small footprint hub controller IC with 2, 3, or 4 downstream ports Fully compliant with the USB 2.0 Specification [1] Enhanced OEM configuration options available through either a single serial I2C(R) EEPROM, or SMBus slave port MultiTRAKTM -- High-performance multiple transaction translator which provides one transaction translator per port PortMap PortSwap -- Flexible port mapping and disable sequencing PHYBoost -- Programmable USB signal drive strength for recovering signal integrity using 4-level driving strength resolution Full power management with individual or ganged power control of each downstream port Fully integrated USB termination and pull-up/pulldown resistors Supports a single external 3.3 V supply source; internal regulators provide 1.2 V internal core voltage Onboard 24 MHz crystal driver or external 24 MHz clock input Customizable vendor ID, product ID, and device ID 4 kilovolts of HBM JESD22-A114F ESD protection (powered and unpowered) Supports self- or bus-powered operation Supports the USB Battery Charging specification Rev. 1.1 for Charging Downstream Ports (CDP) The USB251xB/xBi offers the following package: -- 36-pin QFN (6x6 mm) lead-free RoHS compliant package -- Programmable USB differential-pair pin locations ease PCB design by aligning USB signal lines directly to connectors -- Cost savings include using the same PCB components and application of USB-IF Compliance by Similarity Highlights USB251xB/xBi products are fully footprint compatible with USB251x/xi/xA/xAi products as direct drop-in replacements USB251xBi products support the industrial temperature range of -40C to +85C USB251xB products support the extended commercial temperature range of 0C to +85C Applications LCD monitors and TVs Multi-function USB peripherals PC motherboards Set-top boxes, DVD players, DVR/PVR Printers and scanners PC media drive bay Portable hub boxes Mobile PC docking Embedded systems SMSC USB251xB/xBi Revision 2.2 (02-17-12) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Order Numbers: ORDER NUMBERS* USB2512B-AEZG USB2513B-AEZC USB2514B-AEZC USB2512Bi-AEZG USB2513Bi-AEZG USB2514Bi-AEZG LEAD-FREE ROHS COMPLIANT PACKAGE PACKAGE SIZE (MM) TEMPERATURE RANGE 0C to 85C 36-QFN 6x6x0.5 -40C to 85C * Add -TR to the end of any QFN order number to order tape and reel (36-pin packages only). Reel size is 3,000 pieces. 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 (c) 2012 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. 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 2.2 (02-17-12) 2 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Conventions Within this manual, the following abbreviations and symbols are used to improve readability. Example BIT FIELD.BIT x...y BITS[m:n] PIN zzzzb 0xzzz zzh rsvd code Section Name x <Parameter> {,Parameter} [Parameter] SMSC USB251xB/xBi Description Name of a single bit within a field Name of a single bit (BIT) in FIELD Range from x to y, inclusive Groups of bits from m to n, inclusive Pin Name Binary number (value zzzz) Hexadecimal number (value zzz) Hexadecimal number (value zz) Reserved memory location. Must write 0, read value indeterminate Instruction code, or API function or parameter Section or Document name Don't care <> indicate a Parameter is optional or is only used under some conditions Braces indicate Parameter(s) that repeat one or more times Brackets indicate a nested Parameter. This Parameter is not real and actually decodes into one or more real parameters. 3 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Table of Contents Chapter 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.1 Configurable Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Chapter 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Chapter 3 Pin Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3.1 Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2 Pin List (Alphabetical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 Pin Descriptions (Grouped by Function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3.1 Configuring the Strap Pins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.4 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 14 19 22 23 Chapter 4 Battery Charging Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.1 USB Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1.1 Special Behavior of PRTPWR Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2 Battery Charging Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2.1 Battery Charging enabled via I2C EEPROM or SMBus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 24 25 25 Chapter 5 Initial Interface/Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.1 Internal Register Set (Common to I2C EEPROM and SMBus) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1 Register 00h: Vendor ID (LSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.2 Register 01h: Vendor ID (MSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.3 Register 02h: Product ID (LSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.4 Register 03h: Product ID (MSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.5 Register 04h: Device ID (LSB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.6 Register 05h: Device ID (MSB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.7 Register 06h: CONFIG_BYTE_1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.8 Register 07h: Configuration Data Byte 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.9 Register 08h: Configuration Data Byte 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.10 Register 09h: Non-Removable Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.11 Register 0Ah: Port Disable For Self-Powered Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.12 Register 0Bh: Port Disable For Bus-Powered Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.13 Register 0Ch: Max Power For Self-Powered Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.14 Register 0Dh: Max Power For Bus-Powered Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.15 Register 0Eh: Hub Controller Max Current For Self-Powered Operation . . . . . . . . . . . . . . 5.1.16 Register 0Fh: Hub Controller Max Current For Bus-Powered Operation . . . . . . . . . . . . . . 5.1.17 Register 10h: Power-On Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.18 Register 11h: Language ID High . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.19 Register 12h: Language ID Low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.20 Register 13h: Manufacturer String Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.21 Register 14h: Product String Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.22 Register 15h: Serial String Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.23 Register 16h-53h: Manufacturer String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.24 Register 54h-91h: Product String . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.25 Register 92h-CFh: Serial String. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.26 Register D0h: Battery Charging Enable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.27 Register F6h: Boost_Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.28 Register F8h: Boost_4:0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Revision 2.2 (02-17-12) 4 DATASHEET 27 28 28 29 29 29 29 30 31 32 32 33 33 34 34 34 35 35 35 35 35 36 36 36 36 37 37 37 38 SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.29 Register FAh: Port Swap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.30 Register FBh: PortMap 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.31 Register FCh: PortMap 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.32 Register FFh: Status/Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2 I2C EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.1 I2C Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.2 Protocol Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.3 Pull-Up Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.4 In-Circuit EEPROM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3 SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.1 SMBus Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.2 Protocol Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.3 Slave Device Timeout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.4 Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.5 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.6 Bus Reset Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.7 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4 Default Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5.1 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5.2 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 39 40 41 41 41 41 42 42 42 42 42 43 44 44 44 44 44 44 44 48 Chapter 6 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 6.1 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 6.2 Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 6.2.1 Package Thermal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Chapter 7 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 7.1 Oscillator/Crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2 External Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.1 SMBus Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.2 I2C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 57 57 57 57 Chapter 8 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 8.1 Tape and Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Appendix A (Acronyms). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Appendix B (References) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Datasheet Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 SMSC USB251xB/xBi 5 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet List of Figures Figure 2.1 Figure 3.1 Figure 3.2 Figure 3.3 Figure 3.4 Figure 3.5 Figure 3.6 Figure 4.1 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 5.5 Figure 6.1 Figure 7.1 Figure 7.2 Figure 8.1 Figure 8.2 Figure 8.3 USB251xB/xBi Hub Family Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-Port 36-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-Port 36-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-Port 36-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Non-Removable Pin Strap Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Strap Option with IPD Pin Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LED Pin Strap Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery Charging via External Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset_N Timing for Default Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Supply Rise Time Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical Crystal Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Formula to Find the Value of C1 and C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-Pin QFN, 6x6 mm Body, 0.5 mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-Pin Package Tape Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-Pin Package Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Revision 2.2 (02-17-12) 6 DATASHEET 10 11 12 13 22 22 23 24 43 43 45 46 47 50 56 56 58 59 60 SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet List of Tables Table 1.1 Table 3.1 Table 3.2 Table 3.3 Table 3.4 Table 3.5 Table 5.1 Table 6.1 Table 6.2 Table 6.3 Table 6.4 Table 6.5 Table 6.6 Table 6.7 Table 6.8 Table 6.9 Table 6.10 Table 6.11 Table 7.1 Summary of Compatibilities between USB251xB/xBi and USB251x/xi/xA/xAi Products . . . . 9 USB251xB/xBi Pin List (Alphabetical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 USB251xB/xBi Pin List (Alphabetical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 USB251xB/xBi Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Strap Option Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Initial Interface/Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 Supply Current Unconfigured: Hi-Speed Host (ICCINTHS) . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Supply Current Unconfigured: Full-Speed Host (ICCINTFS). . . . . . . . . . . . . . . . . . . . . . . . . . 52 Supply Current Configured: Hi-Speed Host (IHCH1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Supply Current Configured: Full-Speed Host (IFCC1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 Supply Current Suspend (ICSBY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Supply Current Reset (ICRST) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Pin Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 Package Thermal Resistance Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Package Thermal Resistance Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Crystal Circuit Legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Customer Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 SMSC USB251xB/xBi 7 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 1 Overview The SMSC USB251xB/xBi hub family is a group of low-power, configurable, MTT (multi transaction translator) hub controller ICs. The hub provides downstream ports for embedded USB solutions and is fully compliant with the USB 2.0 Specification [1]. Each of the SMSC hub controllers can attach to an upstream port as a full-speed or full-/hi-speed hub. The hub can support low-speed, full-speed, and hi-speed downstream devices when operating as a hi-speed hub. All required resistors on the USB ports are integrated into the hub. This includes all series termination resistors and all required pull-down and pull-up resistors on D+ and D- pins. The over-current sense inputs for the downstream facing ports have internal pull-up resistors. The USB251xB/xBi hub family includes programmable features, such as: PortMap: provides flexible port mapping and disable sequences. The downstream ports of a USB251xB/xBi hub can be reordered or disabled in any sequence to support multiple platform designs with minimum effort. For any port that is disabled, the USB251xB/xBi hub controller automatically reorders the remaining ports to match the USB host controller's port numbering scheme. 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: enables 4 programmable levels of USB signal drive strength in downstream port transceivers. PHYBoost will also attempt to restore USB signal integrity. 1.1 MultiTRAKTM Technology: implements a dedicated Transaction Translator (TT) for each port. Dedicated TTs help maintain consistent full-speed data throughput regardless of the number of active downstream connections. Configurable Features The SMSC USB251xB/xBi hub controller provides a default configuration that may be sufficient for most applications. Strapping option pins (see Section 3.3.1 on page 22) provide additional features to enhance the default configuration. When the hub is initialized in the default configuration, the following features may be configured using the strapping options: Downstream non-removable ports, where the hub will automatically report as a compound device Downstream disabled ports Enabling of battery charging option on individual ports The USB251xB/xBi hub controllers can alternatively be configured by an external I2C EEPROM or a microcontroller as an SMBus slave device. When the hub is configured by an I2C EEPROM or over SMBus, the following configurable features are provided: Support for compound devices on a port-by-port basis Selectable over-current sensing and port power control on an individual or ganged basis to match the circuit board component selection Customizable vendor ID, product ID, and device ID Configurable USB signal drive strength Configurable USB differential pair pin location Configurable delay time for filtering the over-current sense inputs Configurable downstream port power-on time reported to the host Indication of the maximum current that the hub consumes from the USB upstream port Revision 2.2 (02-17-12) 8 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Indication of the maximum current required for the hub controller Custom string descriptors (up to 31 characters): Product Manufacturer Serial number Battery charging USB251xB/xBi products are fully footprint compatible with USB251x/xi/xA/xAi products: Pin-compatible Direct drop-in replacement Use the same PCB components USB-IF Compliance by Similarity for ease of use and a complete cost reduction solution Product IDs, device IDs, and other register defaults may differ. See Section 5.1 on page 27 for details. Table 1.1 Summary of Compatibilities between USB251xB/xBi and USB251x/xi/xA/xAi Products SMSC USB251xB/xBi Part Number Drop-in Replacement USB2512 USB2512B USB2512i USB2512Bi USB2512A USB2512B USB2512Ai USB2512Bi USB2513 USB2513B USB2513i USB2513Bi USB2514 USB2514B USB2514i USB2514Bi 9 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 2 Block Diagram To upstream VBUS Upstream USB data To I2C EEPROM or SMBus master 24 MHz crystal SDA SCK 3.3 V VDDA Buspower detect/ Vbus pulse Upstream PHY 1.2 V reg Serial interface PLL Serial interface engine Repeater ... 3.3 V TT #1 1.2 V reg Controller TT #x Port controller VDDCR Routing and port re-ordering logic Port #1 PHY#1 USB data downstream OC sense switch driver/ LED drivers ... OC Port sense power switch/ LED drivers Port #x PHY#x USB data downstream OC sense switch driver/ LED drivers OC Port sense power switch/ LED drivers x indicates the number of available downstream ports: 2, 3, or 4 Figure 2.1 USB251xB/xBi Hub Family Block Diagram Revision 2.2 (02-17-12) 10 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 3 Pin Information This chapter outlines the pinning configurations for each package type available, followed by a corresponding pin list organized alphabetically. The detailed pin descriptions are listed then outlined by function in Section 3.3: Pin Descriptions (Grouped by Function) on page 19. 3.1 Pin Configurations VBUS_DET RESET_N HS_IND/CFG_SEL1 SCL/SMBCLK/CFG_SEL0 VDD33 SDA/SMBDATA/NON_REM1 NC NC NC 27 26 25 24 23 22 21 20 19 The following figures detail the pinouts of the various USB251xB/xBi versions. SUSP_IND/LOCAL_PWR/NON_REM0 28 18 NC VDDA33 29 17 OCS_N2 USBDM_UP 30 16 PRTPWR2/BC_EN2 USBDP_UP 31 15 VDD33 XTALOUT 32 14 CRFILT XTALIN/CLKIN 33 13 OCS_N1 PLLFILT 34 12 PRTPWR1/BC_EN1 RBIAS 35 11 TEST VDD33 36 10 VDDA33 SMSC USB2512B/12Bi (Top View QFN-36) 1 2 3 4 5 6 7 8 9 USBDM_DN1 USBDP_DN1 USBDM_DN2 USBDP_DN2 VDDA33 NC NC NC NC Ground Pad (must be connected to VSS) Indicates pins on the bottom of the device. Figure 3.1 2-Port 36-Pin QFN SMSC USB251xB/xBi 11 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller VBUS_DET RESET_N HS_IND/CFG_SEL1 SCL/SMBCLK/CFG_SEL0 VDD33 SDA/SMBDATA/NON_REM1 NC NC OCS_N3 27 26 25 24 23 22 21 20 19 Datasheet SUSP_IND/LOCAL_PWR/NON_REM0 28 18 PRTPWR3/BC_EN3 VDDA33 29 17 OCS_N2 USBDM_UP 30 16 PRTPWR2/BC_EN2 USBDP_UP 31 15 VDD33 14 CRFILT 13 OCS_N1 12 PRTPWR1/BC_EN1 11 TEST 10 VDDA33 5 6 7 8 9 VDDA33 USBDM_DN3/PRT_DIS_M3 USBDP_DN3/PRT_DIS_P3 NC NC 4 36 3 35 USBDP_DN2/PRT_DIS_P2 RBIAS VDD33 Ground Pad (must be connected to VSS) USBDM_DN2/PRT_DIS_M2 34 2 PLLFILT USBDP_DN1/PRT_DIS_P1 33 1 32 USBDM_DN1/PRT_DIS_M1 XTALOUT XTALIN/CLKIN SMSC USB2513B/13Bi (Top View QFN-36) Indicates pins on the bottom of the device. Figure 3.2 3-Port 36-Pin QFN Revision 2.2 (02-17-12) 12 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller VBUS_DET RESET_N HS_IND/CFG_SEL1 SCL/SMBCLK/CFG_SEL0 VDD33 SDA/SMBDATA/NON_REM1 OCS_N4 PRTPWR4/BC_EN4 OCS_N3 27 26 25 24 23 22 21 20 19 Datasheet SUSP_IND/LOCAL_PWR/NON_REM0 28 18 PRTPWR3/BC_EN3 VDDA33 29 17 OCS_N2 USBDM_UP 30 16 PRTPWR2/BC_EN2 USBDP_UP 31 15 VDD33 XTALOUT 32 14 CRFILT XTALIN/CLKIN 33 13 OCS_N1 PLLFILT 34 12 PRTPWR1/BC_EN1 RBIAS 35 11 TEST VDD33 36 10 VDDA33 SMSC USB2514B/14Bi (Top View QFN-36) 7 8 9 USBDP_DN3/PRT_DIS_P3 USBDM_DN4/PRT_DIS_M4 USBDP_DN4/PRT_DIS_P4 6 4 USBDP_DN2/PRT_DIS_P2 USBDM_DN3/PRT_DOS_M3 3 USBDM_DN2/PRT_DIS_M2 5 2 USBDP_DN1/PRT_DIS_P1 VDDA33 1 USBDM_DN1/PRT_DIS_M1 Ground Pad (must be connected to VSS) Indicates pins on the bottom of the device. Figure 3.3 4-Port 36-Pin QFN SMSC USB251xB/xBi 13 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 3.2 Pin List (Alphabetical) Table 3.1 USB251xB/xBi Pin List (Alphabetical) PIN NUMBERS BC_EN1 BC_EN2 Battery Charging Strap Option 12 16 - BC_EN3 18 - BC_EN4 20 Configuration Programming Selection 24 CLKIN External Clock Input 33 CRFILT Core Regulator Filter Capacitor 14 Ground Pad Exposed Pad Tied to Ground (VSS) ePad Hi-Speed Upstream Port Indicator 25 LOCAL_PWR Local Power Detection 28 NC No Connect CFG_SEL0 CFG_SEL1 HS_IND USB2514B USB2514Bi NAME USB2513B USB2513Bi SYMBOL USB2512B USB2512Bi 36 QFN 25 6 - NC 7 - NC 18 - NC 19 - NC 8 - NC 9 - NC 20 - NC 21 - NON_REM0 NON_REM1 OCS_N1 Non-Removable Port Strap Option 28 Over-Current Sense 13 22 17 OCS_N2 - OCS_N3 PLLFILT Revision 2.2 (02-17-12) 19 - OCS_N4 PLL Regulator Filter Capacitor 21 34 14 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Table 3.1 USB251xB/xBi Pin List (Alphabetical) (continued) PIN NUMBERS PRT_DIS_M1 PRT_DIS_M2 Downstream Port Disable Strap Option 3 6 - PRT_DIS_M4 PRT_DIS_P1 1 - PRT_DIS_M3 Port Disable 2 4 - PRT_DIS_P3 USB Port Power Enable 9 12 16 - PRTPWR3 18 - PRTPWR4 RBIAS 7 - PRT_DIS_P4 PRTPWR2 8 - PRT_DIS_P2 PRTPWR1 USB Transceiver Bias 20 35 RESET_N Reset Input 26 SCL Serial Clock 24 SDA Serial Data Signal 22 SMBCLK System Management Bus Clock 24 SMBDATA Server Message Block Data Signal 22 SUSP_IND Active/Suspend Status Indicator 28 TEST USBDM_UP Test Pin 11 USB Bus Data 30 31 USBDP_UP USBDM_DN1 Hi-Speed USB Data 1 3 USBDM_DN2 USBDM_DN3 - 6 - USBDM_DN4 4 USBDP_DN2 - 7 - USBDP_DN4 SMSC USB251xB/xBi 8 2 USBDP_DN1 USBDP_DN3 USB2514B USB2514Bi NAME USB2513B USB2513Bi SYMBOL USB2512B USB2512Bi 36 QFN 15 DATASHEET 9 Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Table 3.1 USB251xB/xBi Pin List (Alphabetical) (continued) PIN NUMBERS VBUS_DET Upstream VBUS Power Detection 27 3.3 V Power VDD33 5 VDD33 10 VDD33 15 VDD33 23 VDD33 29 VDD33 36 XTALIN XTALOUT USB2514B USB2514Bi NAME USB2513B USB2513Bi SYMBOL USB2512B USB2512Bi 36 QFN Crystal Input 33 Crystal Output 32 Table 3.2 USB251xB/xBi Pin List (Alphabetical) PIN NUMBERS BC_EN1 BC_EN2 Battery Charging Strap Option 12 16 - BC_EN3 18 - BC_EN4 20 Configuration Programming Selection 24 CLKIN External Clock Input 33 CRFILT Core Regulator Filter Capacitor 14 Ground Pad (VSS) Exposed Pad Tied to Ground (VSS) ePad HS_IND Hi-Speed Upstream Port Indicator 25 Local Power Detection 28 CFG_SEL0 CFG_SEL1 LOCAL_PWR Revision 2.2 (02-17-12) USB2514B USB2514Bi NAME USB2513B USB2513Bi SYMBOL USB2512B USB2512Bi 36 QFN 25 16 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Table 3.2 USB251xB/xBi Pin List (Alphabetical) (continued) PIN NUMBERS 6 - NC 7 - NC 18 - NC 19 NC USB2514B USB2514Bi No Connect SYMBOL USB2513B USB2513Bi NAME USB2512B USB2512Bi 36 QFN - NC 8 - NC 9 - NC 20 - 21 NC NON_REM0 NON_REM1 OCS_N1 28 Over-Current Sense 13 22 17 OCS_N2 - OCS_N3 PRT_DIS_M1 PRT_DIS_M2 PLL Regulator Filter Capacitor Downstream Port Disable Strap Option - 1 3 - 6 - PRT_DIS_M4 Port Disable 2 4 - PRT_DIS_P3 7 - PRT_DIS_P4 PRTPWR2 8 - PRT_DIS_P2 PRTPWR1 21 34 PRT_DIS_M3 PRT_DIS_P1 19 - OCS_N4 PLLFILT - Non-Removable Port Strap Option USB Port Power Enable 9 12 16 - PRTPWR3 18 - PRTPWR4 20 USB Transceiver Bias 35 RESET_N Reset Input 26 SCL Serial Clock 24 SDA Serial Data Signal 22 RBIAS SMSC USB251xB/xBi 17 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Table 3.2 USB251xB/xBi Pin List (Alphabetical) (continued) PIN NUMBERS SMBCLK System Management Bus Clock 24 SMBDATA Server Message Block Data Signal 22 SUSP_IND Active/Suspend Status Indicator 28 TEST USBDM_UP Test Pin 11 USB Bus Data 30 31 USBDP_UP USBDM_DN1 Hi-Speed USB Data 1 3 USBDM_DN2 - USBDM_DN3 6 - USBDM_DN4 4 USBDP_DN2 - USBDP_DN3 9 Upstream VBUS Power Detection 27 3.3 V Digital Power 15 23 VDD33 36 VDD33 VDDA33 7 - USBDP_DN4 VDD33 8 2 USBDP_DN1 VBUS_DET 3.3 V Analog Power 5 VDDA33 10 VDDA33 29 - VDDA33 XTALIN XTALOUT Revision 2.2 (02-17-12) USB2514B USB2514Bi NAME USB2513B USB2513Bi SYMBOL USB2512B USB2512Bi 36 QFN Crystal Input 33 Crystal Output 32 18 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 3.3 Pin Descriptions (Grouped by Function) An N at the end of a signal name indicates that the active (asserted) state occurs when the signal is at a low voltage level. When the N is not present, the signal is asserted when it is at a high voltage level. The terms assertion and negation are used exclusively in order to avoid confusion when working with a mixture of active low and active high signals. 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. Table 3.3 USB251xB/xBi Pin Descriptions SYMBOL BUFFER TYPE DESCRIPTION UPSTREAM USB 2.0 INTERFACES USBDM_UP USBDP_UP IO-U VBUS_DET I USB Data: connect to the upstream USB bus data signals (host, port, or upstream hub). Detect Upstream VBUS Power: detects the state of the upstream VBUS power. The SMSC hub monitors VBUS_DET to determine when to assert the internal D+ pull-up resistor: (signaling a connect event). When designing a detachable hub, this pin should be connected to VBUS on the upstream port via a 2:1 voltage divider. Two 100 k resistors are suggested. For self-powered applications with a permanently attached host, this pin must be connected to a dedicated host control output, or connected to the 3.3 V domain that powers the host (typically VDD33). DOWNSTREAM USB 2.0 INTERFACES USBDP_DN[x:1]/ PRT_DIS_P[x:1] IO-U Hi-Speed USB Data: connect to the downstream USB peripheral devices attached to the hub's port. To disable, use a 10 k pull-up resistor to 3.3 V. Downstream Port Disable Strap Option: when enabled by package and configuration settings (see Table 5.1 on page 26), this pin is sampled at RESET_N negation to determine if the port is disabled. USBDM_DN[x:1]/ PRT_DIS_M[x:1] To disable a port, pull up both PRT_DIS_M[x:1] and PRT_DIS_P[x:1] pins for the corresponding port number(s). See Section 3.3.1, on page 22 for pull up details. PRTPWR[x:1]/ O12 USB Power Enable: enables power to USB peripheral devices downstream. BC_EN[x:1] IPD Battery Charging Strap Option: when enabled by package and configuration settings (see Table 5.1), the pin will be sampled at RESET_N negation to determine if ports [x:1] support the battery charging protocol. When supporting the battery charging protocol, the hub also supports external port power controllers. The battery charging protocol enables a device to draw the currents per the USB battery charging specification. See Section 3.3.1, on page 22 for strap pin details. 1 : Battery charging feature is supported for port x 0 : Battery charging feature is not supported for port x OCS_N[x:1] IPU Over-Current Sense: input from external current monitor indicating an overcurrent condition. RBIAS I-R USB Transceiver Bias: a 12.0 k (+/- 1%) resistor is attached from ground to this pin to set the transceiver's internal bias settings. SMSC USB251xB/xBi 19 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Table 3.3 USB251xB/xBi Pin Descriptions (continued) SYMBOL BUFFER TYPE DESCRIPTION SERIAL PORT INTERFACES SDA/ I/OSD12 Serial Data Signal SMBDATA/ System Management Bus Signal NON_REM1 Non-Removable Port 1 Strap Option: when enabled by package and configuration options (see Table 5.1 on page 26), this pin will be sampled (in conjunction with LOCAL_PWR/SUSP_IND/NON_REM0) at RESET_N negation to determine if ports [x:1] contain permanently attached (non-removable) devices: NON_REM[1:0] NON_REM[1:0] NON_REM[1:0] NON_REM[1:0] = = = = 00 01 10 11 : : : : all ports are removable port 1 is non-removable ports 1 and 2 are non-removable when available, ports 1, 2, and 3 are non-removable When NON_REM[1:0] is chosen such that there is a non-removable device, the hub will automatically report itself as a compound device (using the proper descriptors). RESET_N IS SCL/ I/OSD12 RESET Input: the system can reset the chip by driving this input low. The minimum active low pulse is 1 s. Serial Clock (SCL) SMBCLK/ System Management Bus Clock CFG_SEL0 Configuration Select: the logic state of this multifunction pin is internally latched on the rising edge of RESET_N (RESET_N negation), and will determine the hub configuration method as described in Table 5.1. HS_IND/ I/O12 Hi-Speed Upstream Port Indicator: upstream port connection speed. Asserted = the hub is connected at HS Negated = the hub is connected at FS Note: When implementing an external LED on this pin, the active state is indicated above and outlined in Section 3.3.1.3, on page 23. Configuration Programming Select 1: the logic state of this pin is internally latched on the rising edge of RESET_N (RESET_N negation), and will determine the hub configuration method as described in Table 5.1. CFG_SEL1 MISC XTALIN ICLKx Crystal Input: 24 MHz crystal. This pin connects to either one terminal of the crystal or to an external 24 MHz clock when a crystal is not used. External Clock Input: this pin connects to either one terminal of the crystal or to an external 24 MHz clock when a crystal is not used. CLKIN XTALOUT Revision 2.2 (02-17-12) OCLKx Crystal Output: this is the other terminal of the crystal circuit with 1.2 V p-p output and a weak (< 1mA) driving strength. When an external clock source is used to drive XTALIN/CLKIN, leave this pin unconnected, or use with appropriate caution. 20 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Table 3.3 USB251xB/xBi Pin Descriptions (continued) SYMBOL BUFFER TYPE SUSP_IND/ I/O DESCRIPTION Active/Suspend Status LED: indicates USB state of the hub. Negated = unconfigured; or configured and in USB suspend Asserted = hub is configured and is active (i.e., not in suspend) Local Power: detects availability of local self-power source. LOCAL_PWR/ Low = self/local power source is NOT available (i.e., the hub gets all power from the upstream USB VBus) High = self/local power source is available Non-Removable 0 Strap Option: when enabled by package and configuration settings (see Table 5.1 on page 26), this pin will be sampled (in conjunction with NON_REM[1]) at RESET_N negation to determine if ports [x:1] contain permanently attached (non-removable) devices: NON_REM0 Note: When implementing an external LED on this pin, the active state is outlined below and detailed in Section 3.3.1.3, on page 23. NON_REM[1:0] = NON_REM[1:0] = NON_REM[1:0] = NON_REM[1:0] = LED is active low TEST IPD 00 01 10 11 : : : : all ports are removable; LED is active high port 1 is non-removable; LED is active low ports 1 and 2 are non-removable; LED is active high (when available) ports 1, 2, and 3 are non-removable; Test Pin: treat as a no connect pin or connect to ground. No trace or signal should be routed or attached to this pin. POWER, GROUND, and NO CONNECTS CRFILT VDD Core Regulator Filter Capacitor: this pin can have up to a 0.1 F low-ESR capacitor to VSS, or be left unconnected. VDD33 3.3 V Power PLLFILT PLL Regulator Filter Capacitor: this pin can have up to a 0.1 F low-ESR capacitor to VSS, or be left unconnected. VSS Ground Pad/ePad: the package slug is the only VSS for the device and must be tied to ground with multiple vias. NC No Connect: no signal or trace should be routed or attached to all NC pins. SMSC USB251xB/xBi 21 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 3.3.1 Configuring the Strap Pins If a pin's strap function is enabled thru the hub configuration selection, (Table 5.1: Initial Interface/Configuration Options on page 26) the strap pins must be pulled either high or low using the values provided in Table 3.4. Each strap option is dependent on the pin's buffer type, as outlined in the sections that follow. Table 3.4 Strap Option Summary STRAP OPTION RESISTOR VALUE BUFFER TYPE 47 - 100 k I/O 10 k IPD 47 - 100 k I/O Non-Removable Internal Pull-Down LED 3.3.1.1 NOTES Only applicable to port power pins Contains a built-in resistor Non-Removable If a strap pin's buffer type is I/O, an external pull-up or pull-down must be implemented as shown in Figure 3.4. Use Strap High to set the strap option to 1 and Stap Low to set the strap option to 0. When implementing the Strap Low option, no additional components are needed (i.e., the internal pull-down provides the resistor) +V R k I/O Strap Pin Strap High I/O Strap Pin Strap Low R k HUB HUB GND Figure 3.4 Non-Removable Pin Strap Example 3.3.1.2 Internal Pull-Down (IPD) If a strap pin's buffer type is IPD (pins BC_EN[x:1]), one of the two hardware configurations outlined below must be implemented. Use the Strap High configuration to set the strap option value to 1 and Strap Low to set the strap option value to 0. +V R k IPD Strap Pin Strap High IPD Strap Pin HUB Strap Low HUB VSS VSS Figure 3.5 Pin Strap Option with IPD Pin Example Revision 2.2 (02-17-12) 22 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 3.3.1.3 LED If a strap pin's buffer type is I/O and shares functionality with an LED, the hardware configuration outlined below must be implemented. The internal logic will drive the LED appropriately (active high or low) depending on the sampled strap option. Use the Strap High configuration to set the strap option value to 1 and Strap Low to set the strap option to 0. +V LED/ Strap High R k Strap Pin Strap Pin HUB HUB R k LED/ Strap Low Figure 3.6 LED Pin Strap Example 3.4 Buffer Type Descriptions Table 3.5 Buffer Type Descriptions BUFFER TYPE I Input I/O Input/output IPD Input with internal weak pull-down resistor IPU Input with internal weak pull-up resistor IS Input with Schmitt trigger O12 Output 12 mA I/O12 Input/output buffer with 12 mA sink and 12 mA source I/OSD12 Open drain with Schmitt trigger and 12 mA sink. Meets the I2C-Bus Specification [2] requirements. ICLKx XTAL clock input OCLKx XTAL clock output I-R I/O-U SMSC USB251xB/xBi DESCRIPTION RBIAS Analog input/output defined in USB specification 23 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 4 Battery Charging Support The USB251xB/xBi SMSC hub provides support for battery charging devices on a per port basis in compliance with the USB Battery Charging Specification, Revision 1.1. The hub can be configured to individually enable each downstream port for battery charging support either via pin strapping as illustrated in Figure 4.1 or by setting the corresponding configuration bits via I2C EEPROM or SMBus (Section 5.1 on page 27). 3.3 V 5.0 V USB Port Power Controller RSTRAP IN USB251xB/xBi PRTPWR[x:1] OCS_N[x] EN VBUS FLAG Figure 4.1 Battery Charging via External Power Supply Note: RSTRAP enables battery charging. 4.1 USB Battery Charging A downstream port enabled for battery charging turns on port power as soon as the power on reset and hardware configuration process has completed. The hub does not need to be enumerated nor does VBUS_DET need to be asserted for the port power to be enabled. These conditions allow battery charging in S3, S4, and S5 system power states as well as in the fully operational state. The USB Battery Charging Specification does not interfere with standard USB operation, which allows a device to perform battery charging at any time. A port that supports battery charging must be able to support 1.5 amps of current on VBUS. Standard USB port power controllers typically only allow for 0.8 amps of current before detecting an over-current condition. Therefore, the 5 volt power supply, port power controller, or over-current protection devices must be chosen to handle the larger current demand compared to standard USB hub designs. 4.1.1 Special Behavior of PRTPWR Pins The USB251xB/xBi enables VBUS by asserting the port power (PRTPWR) as soon as the hardware configuration process has completed. If the port detects an over-current condition, PRTPWR will be turned off to protect the circuitry from overloading. If an over-current condition is detected when the hub is not enumerated, PRTPWR can only be turned on from the host or if RESET_N is toggled. These Revision 2.2 (02-17-12) 24 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet behaviors provide battery charging even when the hub is not enumerated and protect the hub from sustained short circuit conditions. If the short circuit condition persists when the hub is plugged into a host system the user is notified that a port has an over-current condition. Otherwise PRTPWR turned on by the host system and the ports operate normally. 4.2 Battery Charging Configuration The battery charging option can be configured in one of two ways: 4.2.1 When the hub is brought up in the default configuration with strapping options enabled, with the PRTPWR[x:1]/BC_EN[x:1] pins configured. See the following sections for details: -- Section 3.3: Pin Descriptions (Grouped by Function) on page 19 -- Section 3.3.1.2: Internal Pull-Down (IPD) on page 22 When the hub is initialized for configuration over I2C EEPROM or SMBus. Either of these interfaces can be used to configure the battery charging option. Battery Charging enabled via I2C EEPROM or SMBus Register memory map location 0xD0 is allocated for battery charging support. The Battery Charging register at location 0xD0 starting from bit 1 enables battery charging for each downstream port when asserted. Bit 1 represents port 1, bit 2 represents port 2, etc. Each port with battery charging enabled asserts the corresponding PRTPWR[x:1] pin. SMSC USB251xB/xBi 25 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 5 Initial Interface/Configuration Options The hub must be configured in order to correctly function when attached to a USB host controller. The hub can be configured either internally or externally by setting the CFG_SEL[1:0] pins (immediately after RESET_N negation) as outlined in the table below. Note: See Chapter 11 (Hub Specification) of the USB specification for general details regarding hub operation and functionality. To configure the hub externally, there are two principal ways to interface to the hub: over SMBus or I2C EEPROM. The hub can be configured internally, where several default configurations are available as described in the table below. When configured internally, additional configuration is available using the strap options (listed in Section 3.3.1 on page 22). Note: Strap options are not available when configuring the hub over I2C or SMBus. Table 5.1 Initial Interface/Configuration Options CFG_SEL[1] CFG_SEL[0] 0 0 Default configuration: Strap options enabled Self-powered operation enabled Individual power switching Individual over-current sensing 0 1 The hub is configured externally over SMBus (as an SMBus slave device): Strap options disabled All registers configured over SMBus 1 0 Default configuration with the following overrides: Bus-powered operation 1 1 The hub is configured over 2-wire I2C EEPROM: Strap options disabled 2 All registers configured by I C EEPROM Revision 2.2 (02-17-12) DESCRIPTION 26 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Internal Register Set (Common to I2C EEPROM and SMBus) 5.1 The register set available when configuring the hub to interface over I2C or SMBus is outlined in the table below. Each register has R/W capability, where EEPROM reset values are 0x00. Reserved registers should be written to 0 unless otherwise specified. Contents read from unavailable registers should be ignored. 00h Vendor ID LSB 24 01h Vendor ID MSB 04 02h Product ID LSB 03h Product ID MSB 25 04h Device ID LSB B3 05h Device ID MSB 0B 06h Configuration Data Byte 1 9B 07h Configuration Data Byte 2 20 08h Configuration Data Byte 3 02 09h Non-Removable Devices 00 0Ah Port Disable (Self) 00 0Bh Port Disable (Bus) 00 0Ch Max Power (Self) 01 0Dh Max Power (Bus) 32 0Eh Hub Controller Max Current (Self) 01 0Fh Hub Controller Max Current (Bus) 32 10h Power-on Time 32 11h Language ID High 00 12h Language ID Low 00 13h Manufacturer String Length 00 14h Product String Length 00 15h Serial String Length 00 16h-53h Manufacturer String 00 SMSC USB251xB/xBi 27 DATASHEET 12 13 USB2514B/14Bi DEFAULT ROM VALUES (HEXIDECIMAL) USB2513B/13Bi REGISTER NAME USB2512B/12Bi ADDRESS 14 Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 54h-91h Product String 00 92h-CFh Serial String 00 D0h Battery Charging Enable 00 E0h rsvd 00 F5h rsvd 00 F6h Boost_Up 00 F7h rsvd 00 F8h Boost_x:0 00 F9h rsvd 00 FAh Port Swap 00 FBh Port Map 12 00 FCh Port Map 34 FD-FEh rsvd 00 FFh Status/Command Note: SMBus register only 00 5.1.1 - USB2514B/14Bi DEFAULT ROM VALUES (HEXIDECIMAL) USB2513B/13Bi REGISTER NAME USB2512B/12Bi ADDRESS 00 Register 00h: Vendor ID (LSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 VID_LSB Least Significant Byte of the Vendor ID: a 16-bit value that uniquely identifies the Vendor of the user device (assigned by USB-Interface Forum). Set this field using either the SMBus or I2C EEPROM interface options. 5.1.2 Register 01h: Vendor ID (MSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 VID_MSB Most Significant Byte of the Vendor ID: a 16-bit value that uniquely identifies the Vendor of the user device (assigned by USB-Interface Forum). Set this field using either the SMBus or I2C EEPROM interface options. Revision 2.2 (02-17-12) 28 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.3 Register 02h: Product ID (LSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 PID_LSB Least Significant Byte of the Product ID: a 16-bit value that uniquely identifies the Product ID of the user device. Set this field using either the SMBus or I2C EEPROM interface options. 5.1.4 Register 03h: Product ID (MSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 PID_MSB Most Significant Byte of the Product ID: a 16-bit value that uniquely identifies the Product ID of the user device. Set this field using either the SMBus or I2C EEPROM interface options. 5.1.5 Register 04h: Device ID (LSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 DID_LSB Least Significant Byte of the Device ID: a 16-bit device release number in BCD format (assigned by OEM). Set this field using either the SMBus or I2C EEPROM interface options. 5.1.6 Register 05h: Device ID (MSB) BIT NUMBER BIT NAME DESCRIPTION 7:0 DID_MSB Most Significant Byte of the Device ID: a 16-bit device release number in BCD format (assigned by OEM). Set this field using either the SMBus or I2C EEPROM interface options. SMSC USB251xB/xBi 29 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.7 Register 06h: CONFIG_BYTE_1 BIT NUMBER BIT NAME 7 SELF_BUS_PWR DESCRIPTION Self or Bus Power: selects between self- and bus-powered operation. The hub is either self-powered (draws less than 2 mA of upstream bus power) or bus-powered (limited to a 100 mA maximum of upstream power prior to being configured by the host controller). When configured as a bus-powered device, the SMSC hub consumes less than 100 mA of current prior to being configured. After configuration, the buspowered SMSC hub, along with all associated hub circuitry, any embedded devices (if part of a compound device), and all externally available downstream ports (max 100 mA) must consume no more than 500 mA of upstream VBUS current. The current consumption is system dependent and must not violate the USB 2.0 Specification [1]. When configured as a self-powered device, < 1 mA of upstream VBUS current is consumed and all ports are available. Each port is capable of sourcing 500 mA of current. This field is set over either the SMBus or I2C EEPROM interface options. 0 : bus-powered operation 1 : self-powered operation If dynamic power switching is enabled (Section 5.1.8), this bit is ignored and LOCAL_PWR is used to determine if the hub is operating from self or bus power. 6 rsvd 5 HS_DISABLE Hi-Speed Disable: disables the capability to attach as either a hi- or fullspeed device, forcing full-speed attachment only (i.e., no hi-speed support). 0 : hi-/full-speed 1 : full-speed only (hi-speed disabled) 4 MTT_ENABLE Multi-TT Enable: enables one transaction translator per port operation. Selects between a mode where only one transaction translator is available for all ports (single-TT), or each port gets a dedicated transaction translator (multi-TT). 0 : single TT for all ports 1 : multi-TT (one TT per port) 3 EOP_DISABLE EOP Disable: disables End Of Packet (EOP) generation at End Of Frame Time #1 (EOF1) when in full-speed mode. During full-speed operation only, the hub can send EOP when no downstream traffic is detected at EOF1. See the USB 2.0 Specification, Section 11.3.1 for details. 0 : EOP generation is normal 1 : EOP generation is disabled 2:1 CURRENT_SNS Over-Current Sense: selects current sensing on all ports (ganged); a portby-port basis (individual); or none (for bus-powered hubs only). The ability to support current sensing on a ganged or port-by-port basis is hardware implementation dependent. 00 : ganged sensing 01 : individual sensing 1x : over-current sensing not supported (use with bus-powered configurations) Revision 2.2 (02-17-12) 30 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet BIT NUMBER BIT NAME 0 PORT_PWR DESCRIPTION Port Power Switching: enables power switching on all ports (ganged) or a port-by-port basis (individual). The ability to support power enabling on a ganged or port-by-port basis is hardware implementation dependent. 0 : ganged switching 1 : individual switching 5.1.8 Register 07h: Configuration Data Byte 2 BIT NUMBER BIT NAME DESCRIPTION 7 DYNAMIC Dynamic Power Enable: controls the ability of the hub to automatically change from self-powered to bus-powered operation if the local power source is removed or unavailable. It can also go from bus-powered to selfpowered operation if the local power source is restored. When dynamic power switching is enabled, the hub detects the availability of a local power source by monitoring LOCAL_PWR. If the hub detects a change in power source availability, the hub immediately disconnects and removes power from all downstream devices. It also disconnects the upstream port. The hub will then re-attach to the upstream port as either a bus-powered hub (if local power is unavailable) or a self-powered hub (if local power is available). 0 : no dynamic auto-switching 1 : dynamic auto-switching capable 6 rsvd 5:4 OC_TIMER Over Current Timer Delay: 00 01 10 11 3 COMPOUND : : : : 0.1 ms 4.0 ms 8.0 ms 16.0 ms Compound Device: indicates the hub is part of a compound device (see the USB Specification for definition). The applicable port(s) must also be defined as having a non-removable device. Note: When configured via strapping options, declaring a port as nonremovable automatically causes the hub controller to report that it is part of a compound device. 0 : no 1 : yes, the hub is part of a compound device 2:0 SMSC USB251xB/xBi rsvd 31 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.9 Register 08h: Configuration Data Byte 3 BIT NUMBER BIT NAME 7:4 rsvd 3 PRTMAP_EN DESCRIPTION Port Mapping Enable: selects the method used by the hub to assign port numbers and disable ports. 0 : standard mode 1 : port mapping mode 2:1 rsvd 0 STRING_EN Enables String Descriptor Support 0 : string support disabled 1 : string support enabled 5.1.10 Register 09h: Non-Removable Device BIT NUMBER BIT NAME DESCRIPTION 7:0 NR_DEVICE Non-Removable Device: indicates which port has a non-removable device. 0 : port is removable 1 : port is non-removable Bit Bit Bit Bit Bit Bit Bit Bit 7 6 5 4 3 2 1 0 : : : : : : : : rsvd rsvd rsvd controls controls controls controls rsvd port port port port 4 3 2 1 Note: The device must provide its own descriptor data. When using the default configuration, the NON_REM[1:0] pins will designate the appropriate ports as being non-removable. Revision 2.2 (02-17-12) 32 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.11 Register 0Ah: Port Disable For Self-Powered Operation BIT NUMBER BIT NAME 7:0 PORT_DIS_SP DESCRIPTION Port Disable Self-Powered: disables one or more ports. 0 = port is available 1 = port is disabled Bit Bit Bit Bit Bit Bit Bit Bit 7 6 5 4 3 2 1 0 : : : : : : : : rsvd rsvd rsvd controls controls controls controls rsvd port port port port 4 3 2 1 During self-powered operation when mapping mode is disabled (PRTMAP_EN = 0), this register selects the ports that will be permanently disabled. These ports are then unavailable and cannot be enabled or enumerated by a host controller. The ports can be disabled in any order, where the internal logic will automatically report the correct number of enabled ports to the USB host. The active ports will be reordered in order to ensure proper function. When using the default configuration, PRT_DIS_P[x:1] and PRT_DIS_M[x:1] pins disable the appropriate ports. 5.1.12 Register 0Bh: Port Disable For Bus-Powered Operation BIT NUMBER BIT NAME 7:0 PORT_DIS_BP DESCRIPTION Port Disable Bus-Powered: disables one or more ports. 0 = port is available 1 = port is disabled Bit Bit Bit Bit Bit Bit Bit Bit 7 6 5 4 3 2 1 0 : : : : : : : : rsvd rsvd rsvd controls controls controls controls rsvd port port port port 4 3 2 1 During self-powered operation when mapping mode is disabled (PRTMAP_EN = 0), this selects the ports which will be permanently disabled.These ports are then unavailable and cannot be enabled or enumerated by a host controller. The ports can be disabled in any order, where the internal logic will automatically report the correct number of enabled ports to the USB host. The active ports will be reordered in order to ensure proper function. When using the internal default option, the PRT_DIS_P[x:1] and PRT_DIS_M[x:1] pins disable the appropriate ports. SMSC USB251xB/xBi 33 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.13 Register 0Ch: Max Power For Self-Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 MAX_PWR_SP Max Power Self-Powered: the value in 2 mA increments that the hub consumes from an upstream port (VBUS) when operating as a self-powered hub. This value includes the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device. The embedded peripheral reports 0 mA in its descriptors. Note: 5.1.14 The USB 2.0 Specification does not permit this value to exceed 100 mA Register 0Dh: Max Power For Bus-Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 MAX_PWR_BP Max Power Bus-Powered: the value in 2 mA increments that the hub consumes from an upstream port (VBUS) when operating as a bus-powered hub. This value includes the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device. The embedded peripheral reports 0 mA in its descriptors. 5.1.15 Register 0Eh: Hub Controller Max Current For Self-Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 HC_MAX_C_SP Hub Controller Max Current Self-Powered: the value in 2 mA increments that the hub consumes from an upstream port (VBUS) when operating as a selfpowered hub. This value includes the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value does NOT include the power consumption of a permanently attached peripheral if the hub is configured as a compound device. The USB 2.0 Specification does not permit this value to exceed 100 mA A value of 50 (decimal) indicates 100 mA, which is the default value. Note: Revision 2.2 (02-17-12) 34 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.16 Register 0Fh: Hub Controller Max Current For Bus-Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 HC_MAX_C_BP Hub Controller Max Current Bus-Powered: the value in 2 mA increments that the hub consumes from an upstream port (VBUS) when operating as a buspowered hub. This value will include the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value will not include the power consumption of a permanently attached peripheral if the hub is configured as a compound device. A value of 50 (decimal) would indicate 100 mA, which is the default value. Note: 5.1.17 Register 10h: Power-On Time BIT NUMBER BIT NAME DESCRIPTION 7:0 POWER_ON_TIME Power-On Time: the length of time that it takes (in 2 ms intervals) from the time the host initiated the power-on sequence on a port until the port has adequate power. 5.1.18 Register 11h: Language ID High BIT NUMBER BIT NAME 7:0 LANG_ID_H 5.1.19 USB Language ID: upper 8 bits of a 16-bit ID field Register 12h: Language ID Low BIT NUMBER BIT NAME 7:0 LANG_ID_L 5.1.20 DESCRIPTION DESCRIPTION USB Language ID: lower 8 bits of a 16-bit ID field Register 13h: Manufacturer String Length BIT NUMBER BIT NAME DESCRIPTION 7:0 MFR_STR_LEN Manufacturer String Length: with a maximum string length of 31 characters (when supported). SMSC USB251xB/xBi 35 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.21 Register 14h: Product String Length BIT NUMBER BIT NAME DESCRIPTION 7:0 PRD_STR_LEN Product String Length: with a maximum string length of 31 characters (when supported). 5.1.22 Register 15h: Serial String Length BIT NUMBER BIT NAME DESCRIPTION 7:0 SER_STR_LEN Serial String Length: with a maximum string length of 31 characters (when supported). 5.1.23 Register 16h-53h: Manufacturer String BIT NUMBER BIT NAME DESCRIPTION 7:0 MFR_STR Manufacturer String: UNICODE UTF-16LE per USB 2.0 Specification: with a maximum string length of 31 characters (when supported). The string consists of individual 16-bit UNICODE UTF-16LE characters. The characters will be stored starting with the LSB at the least significant address and the MSB at the next 8-bit location. (Subsequent characters must be stored in sequential contiguous addresses in the same LSB, MSB manner.) Warning: Close attention to the byte order of the selected programming tool should be monitored. Note: 5.1.24 Register 54h-91h: Product String BIT NUMBER BIT NAME 7:0 PRD_STR DESCRIPTION Product String: UNICODE UTF-16LE per USB 2.0 Specification When supported, the maximum string length is 31 characters (62 bytes). The string consists of individual 16-bit UNICODE UTF-16LE characters. The characters will be stored starting with the LSB at the least significant address and the MSB at the next 8-bit location. (Subsequent characters must be stored in sequential contiguous address in the same LSB, MSB manner.) Warning: Close attention to the byte order of the selected programming tool should be monitored. Note: Revision 2.2 (02-17-12) 36 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.25 Register 92h-CFh: Serial String BIT NUMBER BIT NAME 7:0 SER_STR DESCRIPTION Serial String: UNICODE UTF-16LE per USB 2.0 specification When supported, the maximum string length is 31 characters (62 bytes). The string consists of individual 16-bit UNICODE UTF-16LE characters. The characters will be stored starting with the LSB at the least significant address and the MSB at the next 8-bit location. (Subsequent characters must be stored in sequential contiguous address in the same LSB, MSB manner.) Warning: Close attention to the byte order of the selected programming tool should be monitored. Note: 5.1.26 Register D0h: Battery Charging Enable BIT NUMBER BIT NAME 7:0 BC_EN DESCRIPTION Battery Charging Enable: enables the battery charging feature for the corresponding port. 0 : battery charging support is not enabled 1 : battery charging support is enabled Bit Bit Bit Bit Bit Bit Bit Bit 5.1.27 7 6 5 4 3 2 1 0 : : : : : : : : rsvd rsvd rsvd controls controls controls controls rsvd port port port port 4 3 2 1 Register F6h: Boost_Up BIT NUMBER BIT NAME 7:2 rsvd 1:0 BOOST_IOUT DESCRIPTION USB electrical signaling drive strength boost bit for the upstream port. 00 01 10 11 : : : : normal electrical drive strength elevated electrical drive strength elevated electrical drive strength elevated electrical drive strength Note: SMSC USB251xB/xBi no boost - low (~ 4% boost) - medium (~ 8% boost) - high (~12% boost) Boost could result in non-USB compliant parameters. Therefore, a value of 00 should be implemented unless specific implementation issues require additional signal boosting to correct for degraded USB signalling levels. 37 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.28 Register F8h: Boost_4:0 BIT NUMBER BIT NAME 7:6 BOOST_IOUT_4 DESCRIPTION USB electrical signaling drive strength boost bit for downstream port 4. 00 01 10 11 5:4 BOOST_IOUT_3 BOOST_IOUT_2 BOOST_IOUT_1 no boost - low (~4% boost) - medium (~ 8% boost) - high (~12% boost) : : : : normal electrical drive strength elevated electrical drive strength elevated electrical drive strength elevated electrical drive strength no boost - low (~4% boost) - medium (~ 8% boost) - high (~12% boost) USB electrical signaling drive strength boost bit for downstream port 2. 00 01 10 11 1:0 normal electrical drive strength elevated electrical drive strength elevated electrical drive strength elevated electrical drive strength USB electrical signaling drive strength boost bit for downstream port 3. 00 01 10 11 3:2 : : : : : : : : normal electrical drive strength elevated electrical drive strength elevated electrical drive strength elevated electrical drive strength no boost - low (~4% boost) - medium (~ 8% boost) - high (~12% boost) USB electrical signaling drive strength boost bit for downstream port 1. 00 01 10 11 : : : : normal electrical drive strength elevated electrical drive strength elevated electrical drive strength elevated electrical drive strength no boost - low (~4% boost) - medium (~ 8% boost) - high (~12% boost) Note: Boost could result in non-USB compliant parameters. Therefore, a value of 00 should be implemented unless specific implementation issues require additional signal boosting to correct for degraded USB signalling levels. 5.1.29 Register FAh: Port Swap BIT NUMBER BIT NAME DESCRIPTION 7:0 PRTSP Port Swap: swaps the upstream USBDP/USBDM pins (USBDP_UP and USBDM_UP) and the downstream USBDP/USBDM pins (USBDP_DN[x:1] and USBDP_DN[x:1]) for ease of board routing to devices and connectors. 0 : USB D+ functionality is associated with the DP pin and D- functionality is associated with the DM pin. 1 : USB D+ functionality is associated with the DM pin and D- functionality is associated with the DP pin. Bit Bit Bit Bit Bit Bit Bit Bit Revision 2.2 (02-17-12) 7 6 5 4 3 2 1 0 : : : : : : : : rsvd rsvd rsvd controls port 4 controls port 3 controls port 2 controls port 1 when set to 1, the upstream port DP/DM is swapped. 38 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.30 Register FBh: PortMap 12 BIT NUMBER BIT NAME DESCRIPTION 7:0 PRTR12 PortMap Register for Ports 1 and 2: When a hub is enumerated by a USB host controller, the hub is only permitted to report how many ports it has; the hub is not permitted to select a numerical range or assignment. The host controller will number the downstream ports of the hub starting with the number 1, up to the number of ports that the hub reports having. The host's port number is called the Logical Port Number and the physical port on the hub is the Physical Port Number. When mapping mode is enabled (see PRTMAP_EN, Section 5.1.9 on page 32) the hub's downstream port numbers can be mapped to different logical port numbers (assigned by the host). Note: Contiguous logical port numbers must be implemented, starting from number 1 up to the maximum number of enabled ports. This ensures that the hub's ports are numbered in accordance with the way a host will communicate with the ports. Bit [7:4] Bit [3:0] SMSC USB251xB/xBi 0000 Physical port 2 is disabled 0001 Physical port 2 is mapped to logical port 1 0010 Physical port 2 is mapped to logical port 2 0011 Physical port 2 is mapped to logical port 3 0100 Physical port 2 is mapped to logical port 4 1000 to 1111 rsvd, will default to 0000 value 0000 Physical port 1 is disabled 0001 Physical port 1 is mapped to logical port 1 0010 Physical port 1 is mapped to logical port 2 0011 Physical port 1 is mapped to logical port 3 0100 Physical port 1 is mapped to logical port 4 1000 to 1111 rsvd, will default to 0000 value 39 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.31 Register FCh: PortMap 34 BIT NUMBER BIT NAME DESCRIPTION 7:0 PRTR34 PortMap Register for Ports 3 and 4: When a hub is enumerated by a USB host controller, the hub is only permitted to report how many ports it has; the hub is not permitted to select a numerical range or assignment. The host controller will number the downstream ports of the hub starting with the number 1, up to the number of ports that the hub reports having. The host's port number is called the Logical Port Number and the physical port on the hub is the Physical Port Number. When mapping mode is enabled (see PRTMAP_EN, Section 5.1.9 on page 32) the hub's downstream port numbers can be mapped to different logical port numbers (assigned by the host). Note: Contiguous logical port numbers must be implemented, starting from number 1 up to the maximum number of enabled ports. This ensures that the hub's ports are numbered in accordance with the way a host will communicate with the ports. Bit [7:4] Bit [3:0] Revision 2.2 (02-17-12) 0000 Physical port 4 is disabled 0001 Physical port 4 is mapped to logical port 1 0010 Physical port 4 is mapped to logical port 2 0011 Physical port 4 is mapped to logical port 3 0100 Physical port 4 is mapped to logical port 4 1000 to 1111 rsvd, will default to 0000 value 0000 Physical port 3 is disabled 0001 Physical port 3 is mapped to logical port 1 0010 Physical port 3 is mapped to logical port 2 0011 Physical port 3 is mapped to logical port 3 0100 Physical port 3 is mapped to logical port 4 1000 to 1111 rsvd, will default to 0000 value 40 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.1.32 Register FFh: Status/Command BIT NUMBER BIT NAME 7:3 rsvd 2 INTF_PW_DN DESCRIPTION SMBus Interface Power Down: 0 : interface is active 1 : interface power down after ACK has completed 1 RESET Reset the SMBus interface and internal memory back to RESET_N assertion default settings. 0 : normal run/idle state 1 : force a reset of registers to their default state 0 USB_ATTACH USB Attach (and write protect) 0 : SMBus slave interface is active 1 : the hub will signal a USB attach event to an upstream device, and the internal memory (address range 0x00-0xFE) is write-protected to prevent unintentional data corruption. 5.2 I2C EEPROM The SMSC hub can be configured via a 2-wire (I2C) EEPROM (256x8). See Table 5.1 for details on enabling the I2C EEPROM interface. The I2C EEPROM interface implements a subset of the I2C Master Specification (refer to the Philips Semiconductor Standard I2C-Bus Specification I2C protocol for details). The hub's interface is designed to attach to a single dedicated I2C EEPROM which conforms to the Standard-mode I2C specification (100 kbit/s transfer rate and 7-bit addressing) for protocol and electrical compatibility. The I2C EEPROM shares the same pins as the SMBus interface, therefore the SMBus interface is not available when the I2C EEPROM interface has been enabled (and vice versa). The hub acts as the master and generates the serial clock SCL, controls the bus access (determines which device acts as the transmitter and which device acts as the receiver), and generates the START and STOP conditions. The hub will read the external EEPROM for configuration data and then attach to the upstream USB host. Note: If no external EEPROM is present, the hub will write 0 to all configuration registers. The hub does not have the capacity to write to the external EEPROM. The hub only has the capability to read from an external EEPROM. The external EEPROM will be read (even if it is blank), and the hub will be configured with the values that are read. Any values read for unsupported registers will not be retained (i.e., they will remain as the default values). Reserved registers should be set to 0 unless otherwise specified. EEPROM reset values are 0x00. Contents read from unavailable registers should be ignored. Note: Go to www.smsc.com, search for USB251xB and select e2prommap.msi from the documents section to download the EEPROM data configuration utility tool. 5.2.1 I2C Slave Address The 7-bit slave address is 0101100b. Note: 10-bit addressing is not supported. 5.2.2 Protocol Implementation The hub will only access an EEPROM using the sequential read protocol as outlined in Chapter 8 of MicroChip 24AA02/24LC02B [4]. SMSC USB251xB/xBi 41 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.2.3 Pull-Up Resistor The circuit board designer is required to place external pull-up resistors (10 k recommended) on the SDA/SMBDATA and SCL/SMBCLK/CFG_SEL[0] lines (per SMBus 1.0 Specification [3], and EEPROM manufacturer guidelines) to VDD33 in order to assure proper operation. 5.2.4 In-Circuit EEPROM Programming The EEPROM can be programmed via automatic test equipment (ATE) by pulling RESET_N low (which tri-states the hub's EEPROM interface and allows an external source to program the EEPROM). 5.3 SMBus The SMSC hub can be configured by an external processor via an SMBus interface (see Table 5.1 for details on enabling the SMBus interface). The SMBus interface shares the same pins as the EEPROM interface, and therefore the hub no longer supports the I2C EEPROM interface when the SMBus interface has been enabled. The SMSC hub waits indefinitely for the SMBus code load to complete and only appears as a newly connected device on USB after the code load is complete. The hub's SMBus acts as a slave-only SMBus device. The implementation only supports block write (Section 5.3.2.1) and block read (Section 5.3.2.2) protocols, where the available registers are outlined in Section 5.1 on page 27. Reference the System Management Bus Specification [3] for additional information. 5.3.1 SMBus Slave Address The 7-bit slave address is 0101100b. The hub will not respond to the general call address of 0000000b. 5.3.2 Protocol Implementation Typical block write and block read protocols are shown in figures 5.1 and 5.2. Register accesses are performed using 7-bit slave addressing, an 8-bit register address field, and an 8-bit data field. The shading shown in the figures during a read or write indicates the hub is driving data on the SMBDATA line; otherwise, host data is on the SDA/SMBDATA line. The SMBus slave address assigned to the hub (0101100b) allows it to be identified on the SMBus. The register address field is the internal address of the register to be accessed. The register data field is the data that the host is attempting to write to the register or the contents of the register that the host is attempting to read. Note: Data bytes are transferred MSB first. Revision 2.2 (02-17-12) 42 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.3.2.1 Block Write/Read The block write begins with a slave address and a write condition. After the command code, the host issues a byte count which describes how many more bytes will follow in the message. If a slave had 20 bytes to send, the first byte would be the number 20 (14h), followed by the 20 bytes of data. The byte count may not be zero. A block write or read allows a transfer maximum of 32 data bytes. Note: For the following SMBus tables: Denotes Master-to-Slave Denotes Slave-to-Master 1 7 1 1 8 1 S Slave Address Wr A Register Address A ... 8 1 8 1 8 1 8 1 1 Byte Count = N A Data byte 1 A Data byte 2 A Data byte N A P Figure 5.1 Block Write 5.3.2.2 Block Read A block read differs from a block write in that the repeated start condition exists to satisfy the I2C specification's requirement for a change in the transfer direction. 1 7 1 1 8 1 1 7 1 1 S Slave Address Wr A Register Address A S Slave Address Rd A ... 8 1 8 1 8 1 8 1 1 Byte Count = N A Data byte 1 A Data byte 2 A Data byte N A P Figure 5.2 Block Read 5.3.2.3 Invalid Protocol Response Behavior Note that any attempt to update registers with an invalid protocol will not be updated. The only valid protocols are write block and read block (described above), where the hub only responds to the 7-bit hardware selected slave address (0101100b). Also, the only valid registers for the hub are outlined in Section 5.1 on page 27. Attempts to access any other registers will return no response. 5.3.3 Slave Device Timeout Devices in a transfer can abort the transfer in progress and release the bus when any single clock low interval exceeds 25 ms (TTIMEOUT, MIN). The master must detect this condition and generate a stop condition within or after the transfer of the interrupted data byte. Slave devices must reset their communication and be able to receive a new START condition no later than 35 ms (TTIMEOUT, MAX). Note: Some simple devices do not contain a clock low drive circuit; this simple kind of device typically resets its communications port after a start or stop condition. The slave device timeout must be implemented. SMSC USB251xB/xBi 43 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.3.4 Stretching the SCLK Signal The hub supports stretching of the SCLK by other devices on the SMBus. However, the hub does not stretch the SCLK. 5.3.5 SMBus Timing The SMBus slave interface complies with the SMBus Specification Revision 1.0 [3]. See Section 2.1, AC Specifications on page 3 for more information. 5.3.6 Bus Reset Sequence The SMBus slave interface resets and returns to the idle state upon a START condition followed immediately by a STOP condition. 5.3.7 SMBus Alert Response Address The SMBALERT# signal is not supported by the hub. 5.4 Default Configuration To put the SMSC hub in the default configuration, strap CFG_SEL[1:0] to 00b. This procedure configures the hub to the internal defaults and enables the strapping options. To place the hub in default configuration with overrides, see Table 5.1 on page 26 for the list of the options. The internal default values are used for the registers that are not controlled by strapping option pins. Refer to Section 5.1 on page 27 for the internal default values that are loaded when this option is selected. For a list of strapping option pins, see Chapter 5 on page 26, and to configure the strapping pins, see Section 3.3.1 on page 22. 5.5 Reset The hub experiences the following two resets: 5.5.1 Hardware reset via the RESET_N pin USB bus reset External Hardware RESET_N A valid hardware reset is defined as assertion of RESET_N for a minimum of 1 s after all power supplies are within operating range. While reset is asserted, the hub (and its associated external circuitry) consumes less than 500 A of current from the upstream USB power source. Assertion of RESET_N causes the following: 1. All downstream ports are disabled, and PRTPWR[x:1] to downstream devices is removed (unless BC_EN[x:1] is enabled). 2. The PHYs are disabled, and the differential pairs will be in a high-impedance state. 3. All transactions immediately terminate; no states are saved. 4. All internal registers return to the default state (in most cases, 00h). 5. The external crystal oscillator is halted. 6. The PLL is halted. The hub is operational 500 s after RESET_N is negated. Once operational, the hub will do one of the following, depending on configuration: Read the strapping pins (default configuration with strapping options enabled) Read configuration information from the external I2C EEPROM Wait for configuration over SMBus. Revision 2.2 (02-17-12) 44 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 5.5.1.1 RESET_N for Strapping Option Configuration Hardware reset asserted Drive strap outputs to Attach USB inactive levels upstream Read CFG_SEL[1:0] t1 USB reset recovery t7 t6 t5 Start completion request response Idle t8 t2 t3 RESET_N VSS t4 CFG_SEL[2:0] don't care valid driven by hub if strap is an output don't care VSS Figure 5.3 Reset_N Timing for Default Configuration NAME DESCRIPTION MIN TYP MAX UNITS 1 s CFG_SEL[1:0] setup time 16.7 ns t3 CFG_SEL[1:0] hold time 16.7 t4 Hub outputs driven to inactive logic states t5 USB attach (see notes) t6 Host acknowledges attach and signals USB reset t7 USB idle t8 Completion time for requests (with or without data stage) t1 RESET_N asserted t2 1.5 1400 ns 2 s 100 ms 100 ms undefined ms 5 msec Notes: When in bus-powered mode, the hub and its associated circuitry must not consume more than 100 mA from the upstream USB power source during t1+t5. All power supplies must have reached the operating levels mandated in Chapter 6: DC Parameters, prior to (or coincident with) the assertion of RESET_N. SMSC USB251xB/xBi 45 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.5.1.2 RESET_N for EEPROM Configuration Hardware reset asserted Read CFG_SEL[1:0] Read I2C EEPROM t1 Attach USB upstream t6 USB reset recovery t7 Start completion request response Idle t8 t9 t5 t2 t3 RESET_N t4 VSS CFG_SEL[2:0] don't care valid don't care VSS Figure 5.4 Reset_N Timing for EEPROM Mode NAME DESCRIPTION MIN TYP MAX UNITS 1 s CFG_SEL[1:0] setup time 16.7 ns t3 CFG_SEL[1:0] hold time 16.7 t4 Hub recovery/stabilization t5 EEPROM read (hub configuration) t6 USB attach (see notes) t7 Host acknowledges attach and signals USB reset t8 USB idle t9 Completion time for requests (with or without data stage) t1 RESET_N asserted t2 2.0 1400 ns 500 s 99.5 ms 100 ms 100 ms undefined ms 5 ms Notes: When in bus-powered mode, the hub and its associated circuitry must not consume more than 100 mA from the upstream USB power source during t6+t7+t8+t9. All power supplies must have reached the operating levels mandated in Chapter 6: DC Parameters, prior to (or coincident with) the assertion of RESET_N. Revision 2.2 (02-17-12) 46 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet RESET_N for SMBus Slave Configuration 5.5.1.3 Hardware reset asserted Read SMBus code Hub PHY Attach USB stabilization upstream CFG_SEL[1:0] load t1 t6 t5 USB reset recovery t7 Start completion request response Idle t8 t9 t2 t3 RESET_N t4 VSS CFG_SEL[2:0] don't care valid don't care VSS Figure 5.5 Reset_N Timing for SMBus Mode NAME DESCRIPTION MIN TYP MAX UNITS 1 s CFG_SEL[1:0] setup time 16.7 ns t3 CFG_SEL[1:0] hold time 16.7 t4 t1 RESET_N Asserted t2 1400 ns Hub recovery/stabilization 500 s t5BUS SMBus code load (Note 5.1) 99.5 ms t5SELF SMBus Code Load (Note 5.1) undefined ms 100 ms t6 Hub configuration and USB attach t7 Host acknowledges attach and signals USB reset t8 USB idle t9 Completion time for requests (with or without data stage) 100 ms undefined ms 5 ms Note 5.1 For bus-powered configurations, there is a 99.5 ms MAX, and the hub and its associated circuitry must not consume more than 100 mA from the upstream USB power source during t4+t5+t6+t7+t8+t9. For self-powered configurations, t5 MAX is not applicable and the time to load the configuration is determined by the external SMBus host. Note 5.2 All power supplies must have reached the operating levels mandated in Chapter 6: DC Parameters, prior to (or coincident with) the assertion of RESET_N. SMSC USB251xB/xBi 47 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 5.5.2 USB Bus Reset In response to the upstream port signaling a reset to the hub, the hub does the following: 1. Sets default internal USB address to 0 2. Sets configuration to: unconfigured 3. Negates PRTPWR[x:1] to all downstream ports unless battery charging (BC_EN[x:1]) is enabled 4. Clears all TT buffers 5. Moves device from suspended to active (if suspended) 6. Complies with Section 11.10 of the USB 2.0 Specification [1] for behavior after completion of the reset sequence. The host then configures the hub and the hub's downstream port devices in accordance with the USB Specification. Note: The hub does not propagate the upstream USB reset to downstream devices. Revision 2.2 (02-17-12) 48 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 6 DC Parameters 6.1 Maximum Guaranteed Ratings PARAMETER SYMBOL Storage Temperature TSTOR MIN MAX -55 UNITS 150 COMMENTS C Lead Temperature Refer to JEDEC Specification J-STD020D [5] 3.3 V supply voltage VDD33 VDDA33 4.6 V Voltage on any I/O pin -0.5 5.5 V Voltage on XTALIN -0.5 4.0 V Voltage on XTALOUT -0.5 2.5 V Applies to all packages Notes: 6.2 Stresses above the specified parameters could cause permanent damage to the device. This is a stress rating only. Therefore, functional operation of the device at any condition above those indicated in the operation sections of this specification are not implied. When powering this device from laboratory or system power supplies, it is important that the absolute maximum ratings not be exceeded or device failure can result. Some power supplies exhibit voltage spikes on their outputs when the AC power is switched on or off. In addition, voltage transients on the AC power line may appear on the DC output. When this possibility exists, it is suggested that a clamp circuit be used. Operating Conditions PARAMETER SYMBOL MIN MAX UNITS COMMENTS Extended Commercial Operating Temperature TAE 0 85 C Ambient temperature in still air Industrial Operating Temperature TAI -40 85 C Ambient temperature in still air 3.3 V supply voltage VDD33 VDDA33 3.3 V supply rise time tRT33 SMSC USB251xB/xBi Only applies to USB251xBi products 3.0 3.6 V Applies to all parts 0 400 s See Figure 6.1 49 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet PARAMETER SYMBOL Voltage on any I/O pin MIN MAX UNITS COMMENTS -0.3 5.5 V If any 3.3 V supply voltage drops below 3.0 V, then the MAX becomes: (3.3 V supply voltage) + 0.5 Voltage on XTALIN -0.3 Voltage VDD33 V tRT33 VDD33 3.3 V 100% 90% VSS 10% t90% t10% Time Figure 6.1 Supply Rise Time Model Table 6.1 DC Electrical Characteristics PARAMETER SYMBOL MIN TYP MAX UNITS 0.8 V COMMENTS I, IS Type Input Buffer Low Input Level VILI High Input Level VIHI 2.0 Input Leakage IIL -10 +10 A Hysteresis (IS only) VHYSI 250 350 mV 0.8 V TTL Levels V VIN = 0 to VDD33 Input Buffer with Pull-Up (IPU) Low Input Level VILI High Input Level VIHI 2.0 Low Input Leakage IILL +35 +90 A VIN = 0 High Input Leakage IIHL -10 +10 A VIN = VDD33 Revision 2.2 (02-17-12) 50 DATASHEET TTL Levels V SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Table 6.1 DC Electrical Characteristics (continued) PARAMETER SYMBOL MIN TYP MAX UNITS 0.8 V COMMENTS Input Buffer with Pull-Down (IPD) Low Input Level VILI TTL Levels High Input Level VIHI 2.0 Low Input Leakage IILL +10 -10 A VIN = 0 High Input Leakage IIHL -35 -90 A VIN = VDD33 0.3 V V USB251xB/xBi ICLK Input Buffer Low Input Level VILCK High Input Level VIHCK 0.9 Input Leakage IIL -10 V +10 A VIN = 0 to VDD33 0.4 V IOL = 12 mA @ O12, I/O12 & I/OSD12 Type Buffer Low Output Level VOL VDD33 = 3.3 V High Output Level VOH 2.4 V IOH = -12 mA @ VDD33 = 3.3 V Output Leakage IOL -10 +10 A Hysteresis (SD pad only) IHYSC 250 350 mV VIN = VDD33 (Notes:) Note 6.1 Output leakage is measured with the current pins in high impedance. Note 6.2 See USB 2.0 Specification [1] for USB DC electrical characteristics. Table 6.2 Supply Current Unconfigured: Hi-Speed Host (ICCINTHS) PART TYP MAX UNITS USB2512B/12Bi 40 45 mA USB2513B/13Bi 40 45 mA USB2514B/14Bi 45 50 mA SMSC USB251xB/xBi MIN 51 DATASHEET COMMENTS Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Table 6.3 Supply Current Unconfigured: Full-Speed Host (ICCINTFS) PART MIN TYP MAX UNITS USB2512B/12Bi 35 40 mA USB2513B/13Bi 35 40 mA USB2514B/14Bi 35 40 mA COMMENTS Table 6.4 Supply Current Configured: Hi-Speed Host (IHCH1) PART MIN TYP MAX UNITS USB2512B 60 65 mA USB2512Bi 60 70 mA USB2513B 65 70 mA USB2513Bi 65 75 mA USB2514B 70 80 mA USB2514Bi 70 85 mA 1 port base 1 port base + + 25 mA 25 mA USB251xB/xBi Supply Current Configured Hi-Speed Host, each additional downstream port COMMENTS This is the base current of one downstream port. mA Table 6.5 Supply Current Configured: Full-Speed Host (IFCC1) PART TYP MAX UNITS USB2512B 45 50 mA USB2512Bi 45 55 mA USB2513B 50 55 mA USB2513Bi 50 60 mA USB2514B 50 60 mA USB2514Bi 50 65 mA 1 port base 1 port base mA + + 8 mA 8 mA USB251xB/xBi Supply Current Configured Full-Speed Host, each additional downstream port Revision 2.2 (02-17-12) MIN 52 DATASHEET COMMENTS Base current of one downstream port SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Table 6.6 Supply Current Suspend (ICSBY) PART MIN TYP MAX UNITS USB2512B 475 1000 A USB2512Bi 475 1200 A USB2513B 500 1100 A USB2513Bi 500 1300 A USB2514B 550 1200 A USB2514Bi 550 1500 A COMMENTS All supplies combined Table 6.7 Supply Current Reset (ICRST) PART MIN TYP MAX UNITS USB2512B 550 1100 A USB2512Bi 550 1250 A USB2513B 650 1200 A USB2513Bi 650 1400 A USB2514B 750 1400 A USB2514Bi 750 1600 A COMMENTS All supplies combined Table 6.8 Pin Capacitance LIMITS PARAMETER Clock Input Capacitance Input Capacitance Output Capacitance Note 6.3 SMSC USB251xB/xBi SYMBOL MIN TYP MAX UNIT TEST CONDITION CXTAL 6 pF All pins except USB pins and the pins under the test tied to AC ground CIN 6 pF (Note 6.3) COUT 6 pF Capacitance TA = 25C; fc = 1 MHz; VDD33 = 3.3 V 53 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet 6.2.1 Package Thermal Specifications Thermal parameters are measured or estimated for devices with the exposed pad soldered to thermal vias in a multilayer 2S2P PCB per JESD51. Thermal resistance is measured from the die to the ambient air. The values provided are based on the package body, die size, maximum power consumption, 85C ambient temperature, and 125C junction temperature of the die. SYMBOL JA JT JC USB2512B/12Bi USB2513B/13Bi USB2514B/14Bi (C/W) VELOCITY (meters/s) 40.1 0 35.0 1 0.5 0 0.7 1 6.3 0 6.3 1 Table 6.9 Package Thermal Resistance Parameters Table 6.10 Package Thermal Resistance Parameters SYMBOL JA JT JC USB2512B/12Bi USB2513B/13Bi USB2514B/14Bi (C/W) VELOCITY (meters/s) 40.1 0 35.0 1 0.5 0 0.7 1 6.3 0 6.3 1 Use the following formulas to calculate the junction temperature: TJ = P x JA + TA TJ = P x JT + TT Revision 2.2 (02-17-12) 54 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet TJ = P x JC + TC Max Power Supported = (TJ Max. Spec. x TAmb.)/ JA Table 6.11 Legend SYMBOL SMSC USB251xB/xBi DESCRIPTION TJ Junction temperature P Power dissipated JA Junction-to-ambient-temperature JC Junction-to-top-of-package JT Junction-to-bottom-of-case TA Ambient temperature TC Temperature of the bottom of the case TT Temperature of the top of the case 55 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 7 AC Specifications 7.1 Oscillator/Crystal Crystal: Parallel resonant, fundamental mode, 24 MHz 350 ppm XTAL1 (CS1 = CB1 + CXTAL1 ) C1 C0 Crystal 1M CL C2 XTAL2 (CS2 = CB2 + CXTAL2 ) Figure 7.1 Typical Crystal Circuit Table 7.1 Crystal Circuit Legend SYMBOL DESCRIPTION IN ACCORDANCE WITH C0 Crystal shunt capacitance CL Crystal load capacitance CB Total board or trace capacitance OEM board design CS Stray capacitance SMSC IC and OEM board design CXTAL XTAL pin input capacitance SMSC IC C1 Load capacitors installed on OEM board Calculated values based on Figure 7.2 (Note 7.2) C2 Crystal manufacturer's specification (Note 7.1) C1 = 2 x (CL - C0) - CS1 C2 = 2 x (CL - C0) - CS2 Figure 7.2 Formula to Find the Value of C1 and C2 Note 7.1 C0 is usually included (subtracted by the crystal manufacturer) in the specification for CL and should be set to 0 for use in the calculation of the capacitance formulas in Figure 7.2. However, the PCB itself may present a parasitic capacitance between XTALIN and XTALOUT. For an accurate calculation of C1 and C2, take the parasitic capacitance between traces XTALIN and XTALOUT into account. Note 7.2 Each of these capacitance values is typically around 18 pF. Revision 2.2 (02-17-12) 56 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet 7.2 External Clock 50% duty cycle 10%, 24 MHz 350 ppm, jitter < 100 ps rms. The external clock is recommended to conform to the signaling level designated in the JESD76-2 Specification [5] on 1.2 V CMOS Logic. XTALOUT should be treated as a weak (<1mA) buffer output. 7.2.1 SMBus Interface The SMSC hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus 1.0 Specification [3] for slave-only devices (except as noted in Section 5.3: SMBus on page 42. 7.2.2 I2C EEPROM Clock frequency is fixed at 60 kHz 20%. 7.2.3 USB 2.0 The SMSC hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB 2.0 Specification [1]. SMSC USB251xB/xBi 57 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller 58 DATASHEET SMSC USB251xB/xBi Figure 8.1 36-Pin QFN, 6x6 mm Body, 0.5 mm Pitch Datasheet Revision 2.2 (02-17-12) Chapter 8 Package Outlines USB 2.0 Hi-Speed Hub Controller Datasheet 8.1 Tape and Reel Specifications Figure 8.2 36-Pin Package Tape Specifications SMSC USB251xB/xBi 59 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Figure 8.3 36-Pin Package Reel Specifications Revision 2.2 (02-17-12) 60 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Appendix A (Acronyms) I2C(R): Inter-Integrated Circuit1 OCS: Over-Current Sense PCB: Printed Circuit Board PHY: Physical Layer PLL: Phase-Locked Loop QFN: Quad Flat No Leads RoHS: Restriction of Hazardous Substances Directive SCL: Serial Clock SIE: Serial Interface Engine SMBus: System Management Bus TT: Transaction Translator 1.I2C is a registered trademark of Philips Corporation. SMSC USB251xB/xBi 61 DATASHEET Revision 2.2 (02-17-12) USB 2.0 Hi-Speed Hub Controller Datasheet Appendix B (References) [1] Universal Serial Bus Specification, Version 2.0, April 27, 2000 (12/7/2000 and 5/28/2002 Errata) USB Implementers Forum, Inc. http://www.usb.org [2] I2C-Bus Specification Version 1.1 NXP (formerly a division of Philips). http://www.nxp.com [3] System Management Bus Specification, version 1.0 SMBus. http://smbus.org/specs/ [4] MicroChip 24AA02/24LC02B (Revision C) Microchip Technology Inc. http://www.microchip.com/ [5] JEDEC Specifications: JESD76-2 (June 2001) and J-STD-020D.1 (March 2008) JEDEC Global Standards for the Microelectronics Industry. http://www.jedec.org/standards-documents Revision 2.2 (02-17-12) 62 DATASHEET SMSC USB251xB/xBi USB 2.0 Hi-Speed Hub Controller Datasheet Datasheet Revision History Customer Revision History REVISION LEVEL & DATE Rev. 2.2 (02-17-12) SECTION/FIGURE/ENTRY CORRECTION Cover Updated clock bullet to remove reference to 48MHz clock support. Section 1.1: Configurable Features on page 8 Updated bulleted lists. USB signal drive strength, USB differential pair pin location and downstream port power control / over-current detection items moved from first (strap-configurable) bulleted list to the second (EEPROM-configurable) bulleted list. Added enabling of battery charging to the first bulleted list. Section 3.1: Pin Configurations on page 11 Clarified introductory sentence. Table 3.3: USB251xB/xBi Pin Descriptions on page 19 Updated VBUS_DET buffer type to "I" and changed description to: "For self-powered applications with a permanently attached host, this pin must be connected to a dedicated host control output, or connected to the 3.3 V domain that powers the host (typically VDD33)." Table 3.3: USB251xB/xBi Pin Descriptions on page 19 Updated CRFILT and PLLFILT pin descriptions. Section 7.1: Oscillator/Crystal on page 56 Removed redundant sentence: "External Clock: 50% duty cycle 10%, 24/48 MHz 350 ppm, jitter < 100 ps rms". This information is provided in Section 7.2: External Clock on page 57. Chapter 7: AC Specifications Removed ceramic resonator information. Section 7.2: External Clock Replaced "1.8 V CMOS Logic" with "1.2 V CMOS Logic". Updated XTALOUT description. Section 3.3: Pin Descriptions (Grouped by Function) Updated CRFILT and PLLFILT pin descriptions. Cover, Package, All Removed the 49-BGA option. Order Code Page Changed ordering codes for non-industrial USB2513B and USB2514B. Last character was changed from "G" to "C". Front page Removed support for ceramic resonator. Rev. 2.1 (02/24/11) Section 6.1 and 6.2, DC Parameters The 1.2V supply information was added and the graph that includes both 3.3 and 1.2 V rise time was added for 49-BGA. Rev. 2.1 (02/24/11) All Added the 49-BGA option. Rev. 2.1 (02/22/11) Section 6.2.1, Package Thermal Specifications Added Max Power Supported = (TJ, max.spec. - Tamb)/ JA Rev. 2.0 (10/01/10) All General refresh, corrected grammatical errors and unified tone. SMSC USB251xB/xBi 63 DATASHEET Revision 2.2 (02-17-12)