USB2514

USB2512/12A/12B USB2513/13B USB2514/14B USB2517 USB 2.0 Hi-Speed Hub Controller PRODUCT FEATURES General Description The SMSC USB251x hub is a family of low-power, OEM configurable, MTT (multi transaction translator)1 hub controller IC products for embedded USB solutions. The “x” in the part number indicates the number of downstream ports available. The SMSC hub supports low-speed, full-speed, and hi-speed (if operating as a hispeed hub) downstream devices on all of the enabled downstream ports. For a summary of the products documented in this datasheet, please refer to the Chapter 1, "USB251x Hub Family Differences Overview," on page 7. Datasheet Features 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 or 1.8 V internal core voltage On-chip driver for 24 MHz crystal resonator or external 24/48 MHz clock input Customizable vendor ID, product ID, and device ID ESD protection up to 4 kilovolts on all USB pins Supports self- or bus-powered operation USB251xB2 and USB251xBi products support the USB Battery Charging specification Lead-free RoHS compliant packages: — 36-pin QFN (6x6 mm) — 48-pin QFN (7x7 mm) — 64-pin QFN (9x9 mm) Highlights High performance, low-power, small footprint hub controller IC with 2, 3, 4, or 7 downstream ports (indicated by the “x” in the part number) Fully compliant with the USB 2.0 specification Enhanced OEM configuration options available through either a single serial I2C® EEPROM, or SMBus slave port MultiTRAKTM PortMap USB251xi, USB2512Ai, and USB251xBi products support the industrial temperature range of -40ºC to +85ºC 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 — High-performance multiple transaction translator which provides one transaction translator per port — Flexible port mapping and disable sequencing — Programmable USB differential-pair pin locations ease PCB design by aligning USB signal lines directly to connectors — Programmable USB signal drive strength for recovering signal integrity using 4-level driving strength resolution PortSwap PHYBoost 1.USB2512A/Ai only uses a single transaction translator. 2.USB251xB and USB251xBi products are not yet available. The information in this datasheet regarding USB251xB/Bi serves as a preliminary product preview. SMSC USB251x Hub Family DATASHEET Revision 1.0 (3-11-09) USB 2.0 Hi-Speed Hub Controller Datasheet ORDER NUMBERS: LEAD-FREE ROHS COMPLIANT PACKAGE 36QFN ORDER NUMBERS USB2512-AEZG USB2512A-AEZG USB2512B-AEZG USB2513-AEZG USB2513B-AEZG USB2514-AEZG USB2514B-AEZG USB2512i-AEZG USB2512Ai-AEZG USB2512Bi-AEZG USB2513i-AEZG USB2513Bi-AEZG USB2514i-AEZG USB2514Bi-AEZG USB2513-HZH USB2514-HZH USB2517-JZX USB2517i-JZX PACKAGE SIZE 6 x 6 x 0.5 mm TEMPERATURE RANGE 0ºC to 70ºC 36QFN 6 x 6 x 0.5 mm -40ºC to 85ºC 48QFN 64QFN 64QFN 7 x 7 x 0.5 mm 9 x 9 x 0.5 mm 9 x 9 x 0.5 mm 0ºC to 70ºC 0ºC to 70ºC -40ºC to 85ºC Note: USB251xB/USB251xBi products have not yet been released. They are featured in this datasheet as a preliminary product preview. 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2009 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 1.0 (3-11-09) 2 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table of Contents Chapter 1 USB251x Hub Family Differences Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Chapter 2 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Chapter 3 Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Chapter 4 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Chapter 5 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.1 5.2 5.3 Pin Configurations and Lists (Organized by Package Type) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 USB251x Pin Descriptions (Grouped by Function). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Chapter 6 LED Usage Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.1 LED Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.1.1 USB Mode 14-Wire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6.1.2 LED Mode Speed Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Chapter 7 Battery Charging Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 7.1 7.2 7.3 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . USB Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.1 Special Behavior of PRTPWR Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery Charging Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.1 Battery Charging enabled via EEPROM or SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 31 31 32 32 Chapter 8 Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 8.1 Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.1 Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.2 SMBus or EEPROM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.3 VBus Detect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EEPROM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.1 Internal Register Set (Common to EEPROM and SMBus) . . . . . . . . . . . . . . . . . . . . . . . 8.2.2 I2C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.3 In-Circuit EEPROM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMBus Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.1 SMBus Slave Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.2 Bus Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.3 Invalid Protocol Response Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.4 General Call Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.5 Slave Device Time-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.6 Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.7 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.8 Bus Reset Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.3.9 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Default Configuration Option: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Default Strapping Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.1 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.2 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 33 33 34 34 35 52 52 53 53 53 54 54 54 54 54 54 55 55 55 55 55 58 8.2 8.3 8.4 8.5 8.6 Chapter 9 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 SMSC USB251x 3 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet 9.1 9.2 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 Chapter 10 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 10.1 Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.1.1 SMBus Interface: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.1.2 I2C EEPROM: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.1.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 66 66 66 Chapter 11 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 11.1 Tape and Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 Revision 1.0 (3-11-09) 4 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet List of Tables Table 1.1 Table 1.2 Table 1.3 Table 5.1 Table 5.2 Table 5.3 Table 8.1 Table 8.2 Table 8.3 Table 8.4 Table 8.5 Table 8.6 Table 8.7 Table 8.8 Table 8.9 Table 9.1 Table 9.2 36-pin QFN (6x6x0.5 mm) RoHS Compliant Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 48-pin QFN (7x7x0.5 mm) RoHS Compliant Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 64-pin QFN (9x9x0.5 mm) RoHS Compliant Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Pin List in Alphabetical Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 USB251x Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Internal Default, EEPROM and SMBus Register Memory Map. . . . . . . . . . . . . . . . . . . . . . . . 35 PortMap Register for Ports 1 & 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 PortMap Register for Ports 3 & 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 PortMap Register for Ports 5 & 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 PortMap Register for Port 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 Reset_N Timing for Default/Strap Option Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Pin Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 SMSC USB251x 5 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet List of Figures Figure 4.1 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 5.5 Figure 5.6 Figure 6.1 Figure 7.1 Figure 8.1 Figure 8.2 Figure 8.3 Figure 8.4 Figure 8.5 Figure 9.1 Figure 10.1 Figure 10.2 Figure 10.3 Figure 11.1 Figure 11.2 Figure 11.3 Figure 11.4 Figure 11.5 Figure 11.6 USB251x Hub Family Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-Port 36-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-Port 36-pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-Port 36-pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-Port 48-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-Port 48-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-Port 64-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Dual Color LED Implementation Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Battery Charging via External Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Block Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Simplified Form of the Capacitance Formula . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-Pin QFN, 6x6 mm Body, 0.5 mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48-Pin QFN, 7x7 mm Body, 0.5 mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64-Pin QFN, 9x9 mm Body, 0.5 mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-Pin Package Tape Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48-Pin Package Tape Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-Pin and 48-Pin Package Reel Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 12 13 14 15 16 17 29 31 53 54 56 57 58 61 66 66 66 67 68 69 70 71 72 Revision 1.0 (3-11-09) 6 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 1 USB251x Hub Family Differences Overview Table 1.1 36-pin QFN (6x6x0.5 mm) RoHS Compliant Part Numbers Part Number Downstream ports Default TT True Speed Battery Charging LED Port Indicators Clock (MHz) 0ºC to 70ºC -40ºC to 85ºC USB2512 USB2512A USB2512B USB2512i USB2512Bi USB2512Ai USB2513 USB2513B USB2513i USB2513Bi USB2514 USB2514B USB2514i USB2514Bi 2 multi** * 24 2 3 multi** * * * * * 24 multi 24 3 4 multi 24 multi 24 4 multi 24 Table 1.2 48-pin QFN (7x7x0.5 mm) RoHS Compliant Part Numbers Part Number Downstream ports Default TT True Speed Battery Charging LED Port Indicators Clock (MHz) 0ºC to 70ºC -40ºC to 85ºC USB2513 USB2514 3 4 multi multi 24/48 24/48 Table 1.3 64-pin QFN (9x9x0.5 mm) RoHS Compliant Part Numbers Part Number Downstream ports Default TT True Speed Battery Charging LED Port Indicators Clock (MHz) 0ºC to 70ºC -40ºC to 85ºC USB2517 USB2517i 7 7 multi multi 24 24 Note 1.1 Note 1.2 *Battery charging enable is only available on USB251x/xBi products. **USB2512A/Ai only uses a single transaction translator. SMSC USB251x 7 Revision 1.0 (3-11-09) DATASHEET USB 2.0 High-Speed 2-Port Hub Controller Datasheet Chapter 2 General Description The SMSC USB251x hub family is a group of low-power, OEM configurable, MTT (multi transaction translator)1 hub controller IC’s with downstream ports for embedded USB solutions. The SMSC USB251x hub family is fully compliant with the USB 2.0 specification. Each of the SMSC hub controllers can attach to an upstream port as a full-speed hub or as a full-/hi-speed hub. The SMSC hub controllers support low-speed, full-speed, and hi-speed (if operating as a hi-speed hub) downstream devices on all of the enabled downstream ports. All required resistors on the USB ports are integrated into the hub. This includes all series termination resistors on D+ and D– pins and all required pull-down and pull-up resistors on D+ and D– pins. The over-current sense inputs for the downstream facing ports have internal pullup resistors. The USB251x hub family includes programmable features such as: MultiTRAKTM Technology which utilizes a dedicated TT per port to maintain consistent fullspeed data throughput regardless of the number of active downstream connections. MultiTRAKTM outperforms conventional USB 2.0 hubs with a single TT in USB full-speed data transfers. PortMap which provides flexible port mapping and disable sequences. The downstream ports of a USB251x hub can be reordered or disabled in any sequence to support multiple platform designs with minimum effort. For any port that is disabled, the USB251x hub controllers automatically reorder the remaining ports to match the USB host controller’s port numbering scheme. PortSwap which adds per-port programmability to USB differential-pair pin locations. PortSwap allows direct alignment of USB signals (D+/D-) to connectors to avoid uneven trace length or crossing of the USB differential signals on the PCB. PHYBoost which enables 4 programmable levels of USB signal drive strength in downstream port transceivers. PHYBoost attempts to restore USB signal integrity. OEM Selectable Features A default configuration is available in each of the SMSC USB251x hub controllers following a reset. This configuration may be sufficient for most applications. Strapping option pins make it possible to modify a sub-set of the configuration options. The USB251x hub controllers may be configured by an external EEPROM or a microcontroller. When using the microcontroller interface, the hub appears as an SMBus slave device. If the hub is pin-strapped for external EEPROM configuration but no external EEPROM is present, then a value of ‘0’ will be written to all configuration data bit fields (the hub will attach to the host with all ‘0’ values). The USB251x hub family supports OEM selectable features including: Optional OEM configuration via I2C EEPROM or via the industry standard SMBus interface from an external SMBus host or microcontroller. Supports 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 OEM’s choice of circuit board component selection. Customizable vendor ID, product ID, and device ID. Configurable delay time for filtering the over-current sense inputs. Configurable downstream port power-on time reported to the host. Supports indication of the maximum current that the hub consumes from the USB upstream port. Supports Indication of the maximum current required for the hub controller. 1.USB2512A/2Ai only uses a single transaction translator. Revision 1.0 (3-11-09) 8 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Supports custom string descriptors (up to 31 characters): - Product string - Manufacturer string - Serial number string When available, pin selectable options for default configuration may include: -Downstream ports as non-removable ports -Downstream ports as disabled ports -Downstream port power control and over-current detection on a ganged or individual basis -USB signal drive strength -USB differential pair pin location SMSC USB251x 9 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 3 Acronyms I2C®: 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. Revision 1.0 (3-11-09) 10 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 4 Block Diagram To EEPROM or SMBus Master SDA SCK To Upstream VBUS Upstream USB Data 3.3 V 24 MHz Crystal BusPower Detect/ Vbus Pulse Upstream PHY Repeater Regulator PLL Serial Interface Serial Interface Engine Controller 3.3 V Regulator CRFILT TT #1 ... TT #x Port Controller Routing & Port Re-Ordering Logic Port #1 PHY#1 OC Sense Switch Driver/ LED Drivers ... Port #x PHY#x OC Sense Switch Driver/ LED Drivers OC USB Data Port Downstream Sense Power Switch/ LED Drivers USB Data OC Port Downstream Sense Power Switch/ LED Drivers The ‘x’ indicates the number of available downstream ports: 2, 3, 4, or 7. Figure 4.1 USB251x Hub Family Block Diagram Note 4.1 Note 4.2 USB2512A/USB2512Ai only supports a single transaction translator. The LED port indicators only apply to USB2513/14 (48QFN only) and USB2517/17i. SMSC USB251x 11 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Chapter 5 Pin Descriptions This chapter is organized by a set of pin configurations (organized by package type) followed by a corresponding pin list organized alphabetically. A comprehensive and detailed description list of each signal (named in the pin list) is organized by function in Table 5.2, “USB251x Pin Descriptions,” on page 22. Please refer to Table 5.3, “Buffer Type Descriptions,” on page 27 for a list of buffer types. The “N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low voltage level. When “N” is not present after the signal name, the signal is asserted when it is at the high voltage level. The terms assertion and negation are used exclusively. This is done 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. 5.1 Pin Configurations and Lists (Organized by Package Type) SDA / SMBDATA / NON_REM[1] SCL / SMBCLK / CFG_SEL[0] HS_IND / CFG_SEL[1] VBUS_DET RESET_N VDD33 NC NC 27 26 25 24 23 22 21 20 SUSP_IND / LOCAL_PWR / NON_REM[0] VDD33 USBDM_UP USBDP_UP XTALOUT XTALIN / CLKIN PLLFILT RBIAS VDD33 28 29 30 31 32 33 34 35 36 1 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 12 11 10 NC NC OCS_N[2] PRTPWR[2] / BC_EN[2]* VDD33 CRFILT OCS_N[1] PRTPWR[1] / BC_EN[1]* TEST VDD33 SMSC USB2512/12A/12B USB2512i/12Ai/12Bi (Top View QFN-36) Ground Pad (must be connected to VSS) USBDP_DN[1] USBDM_DN[1] USBDM_DN[2] USBDP_DN[2] VDD33 NC NC NC Indicates pins on the bottom of the device. Figure 5.1 2-Port 36-Pin QFN Note: *Battery charging enable (BC_EN) is only available in the USB251xB/Bi. Revision 1.0 (3-11-09) 12 SMSC USB251x DATASHEET NC USB 2.0 Hi-Speed Hub Controller Datasheet SDA / SMBDATA / NON_REM[1] SCL / SMBCLK / CFG_SEL[0] HS_IND / CFG_SEL[1] VBUS_DET RESET_N 27 26 25 24 23 22 21 20 SUSP_IND / LOCAL_PWR / NON_REM[0] VDD33 USBDM_UP USBDP_UP XTALOUT XTALIN / CLKIN PLLFILT RBIAS VDD33 28 29 30 31 32 33 34 35 36 1 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 12 11 10 OCS_N[3] VDD33 NC NC PRTPWR[3] / BC_EN[3]* OCS_N[2] PRTPWR[2] / BC_EN[2]* VDD33 CRFILT OCS_N[1] PRTPWR[1] / BC_EN[1]* TEST VDD33 SMSC USB2513/13i USB2513B/13Bi (Top View QFN-36) Ground Pad (must be connected to VSS) USBDM_DN[1] / PRT_DIS_M[1] USBDM_DN[2] / PRT_DIS_M[2] USBDM_DN[3] / PRT_DIS_M[3] USBDP_DN[1] / PRT_DIS_P[1] USBDP_DN[2] / PRT_DIS_P[2] USBDP_DN[3] / PRT_DIS_P[3] NC Indicates pins on the bottom of the device. Figure 5.2 3-Port 36-pin QFN Note: *Battery charging enable (BC_EN) is only available in the USB251xB/Bi. SMSC USB251x 13 VDD33 NC Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet SDA / SMBDATA / NON_REM[1] SCL / SMBCLK / CFG_SEL[0] PRTPWR[4] / BC_EN[4]* HS_IND / CFG_SEL[1] VBUS_DET RESET_N OCS_N[4] 27 26 25 24 23 22 21 20 SUSP_IND / LOCAL_PWR / NON_REM[0] VDD33 USBDM_UP USBDP_UP XTALOUT XTALIN / CLKIN PLLFILT RBIAS VDD33 28 29 30 31 32 33 34 35 36 1 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 12 11 10 OCS_N[3] VDD33 PRTPWR[3] / BC_EN[3]* OCS_N[2] PRTPWR[2] / BC_EN[2]* VDD33 CRFILT OCS_N[1] PRTPWR[1] / BC_EN[1]* TEST VDD33 SMSC USB2514/14i USB2514B/14Bi (Top View QFN-36) Ground Pad (must be connected to VSS) USBDP_DN[1] / PRT_DIS_P[1] USBDP_DN[2] / PRT_DIS_P[2] USBDP_DN[3] / PRT_DIS_P[3] USBDM_DN[1] / PRT_DIS_M[1] USBDM_DN[2] / PRT_DIS_M[2] USBDM_DN[3] / PRT_DIS_M[3] Indicates pins on the bottom of the device. Figure 5.3 4-Port 36-pin QFN Note: *Battery charging enable (BC_EN) is only available in the USB251xB/Bi. Revision 1.0 (3-11-09) 14 USBDM_DN[4] / PRT_DIS_M[4] USBDP_DN[4] / PRT_DIS_P[4] VDD33 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet SDA / SMBDATA / NON_REM[1] SCL / SMBCLK / CFG_SEL[0] 36 35 34 33 32 31 30 29 28 27 26 LED_A_N[1] / PRTSWP[1] PRTPWR_POL SUSP_IND / LOCAL_PWR / NON_REM[0] SEL48 VDD33 USBDM_UP USBDP_UP XTALOUT XTALIN / CLKIN PLLFILT RBIAS VDD33 37 38 39 40 41 42 43 44 45 46 47 48 10 11 12 1 2 3 4 5 6 7 8 9 Ground Pad (must be connected to VSS) 25 24 23 22 21 20 19 18 17 16 15 14 13 LED_A_N[2] / PRTSWP[2] LED_B_N[1] / BOOST[0] HS_IND / CFG_SEL[1] CFG_SEL[2] VBUS_DET RESET_N OCS_N[3] VDD33 NC NC LED_B_N[2] / BOOST[1] LED_A_N[3] / PRTSWP[3] LED_B_N[3] / GANG_EN PRTPWR[3] OCS_N[2] PRTPWR[2] VDD33 CRFILT OCS_N[1] PRTPWR[1] TEST NC SMSC USB2513 (Top View QFN-48) USBDM_DN[1] / PRT_DIS_M[1] USBDM_DN[2] / PRT_DIS_M[2] USBDM_DN[3] / PRT_DIS_M[3] USBDP_DN[1] / PRT_DIS_P[1] USBDP_DN[2] / PRT_DIS_P[2] USBDP_DN[3] / PRT_DIS_P[3] VDD33 VDD33 NC NC NC Indicates pins on the bottom of the device. Figure 5.4 3-Port 48-Pin QFN SMSC USB251x 15 NC Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet SDA / SMBDATA / NON_REM[1] SCL / SMBCLK / CFG_SEL[0] 36 35 34 33 32 31 30 29 28 27 26 LED_A_N[1] / PRTSWP[1] PRTPWR_POL SUSP_IND / LOCAL_PWR / NON_REM[0] SEL48 VDD33 USBDM_UP USBDP_UP XTALOUT XTALIN / CLKIN PLLFILT RBIAS VDD33 37 38 39 40 41 42 43 44 45 46 47 48 10 11 12 1 2 3 4 5 6 7 8 9 Ground Pad (must be connected to VSS) 25 24 23 22 21 20 19 18 17 16 15 14 13 LED_A_N[2] / PRTSWP[2] LED_B_N[1] / BOOST[0] HS_IND / CFG_SEL[1] CFG_SEL[2] PRTPWR[4] VBUS_DET RESET_N OCS_N[4] OCS_N[3] VDD33 LED_B_N[2] / BOOST[1] LED_A_N[3] / PRTSWP[3] LED_B_N[3] / GANG_EN PRTPWR[3] OCS_N[2] PRTPWR[2] VDD33 CRFILT OCS_N[1] PRTPWR[1] TEST LED_A_N[4] / PRTSWP[4] SMSC USB2514 (Top View QFN-48) USBDP_DN[1] / PRT_DIS_P[1] USBDP_DN[2] / PRT_DIS_P[2] USBDP_DN[3] / PRT_DIS_P[3] USBDM_DN[1] / PRT_DIS_M[1] USBDM_DN[2] / PRT_DIS_M[2] USBDM_DN[3] / PRT_DIS_M[3] USBDM_DN[4] / PRT_DIS_M[4] USBDP_DN[4] / PRT_DIS_P[4] Indicates pins on the bottom of the device. Figure 5.5 4-Port 48-Pin QFN Revision 1.0 (3-11-09) 16 LED_B_N[4] VDD33 VDD33 NC SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet SUSP_IND / LOCAL_PWR / NON_REM[0] SDA / SMBDATA / NON_REM[1] SCL / SMBCLK / CFG_SEL[0] LED_A_N[3] / PRTSWP[3] 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 LED_A_N[2] / PRTSWP[2] LED_B_N[1] / BOOST[0] LED_A_N[1] / PRTSWP[1] VDD33 USBDM_DN[6] / PRT_DIS_M[6] USBDP_DN[6] / PRT_DIS_P[6] USBDM_DN[7] / PRT_DIS_M[7] USBDP_DN[7] / PRT_DIS_P[7] VDD33 USBDM_UP USBDP_UP XTALOUT XTALIN / CLKIN PLLFILT RBIAS VDD33 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 Ground Pad (must be connected to VSS) 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 LED_A_N[4] / PRTSWP[4] LED_B_N[3] / GANG_EN LED_B_N[2] / BOOST[1] HS_IND / CFG_SEL[1] PRTPWR[6] PRTPWR[7] VBUS_DET RESET_N OCS_N[6] OCS_N[7] OCS_N[5] VDD33 LED_B_N[4] LED_A_N[5] / PRTSWP[5] PRTPWR[5] PRTPWR[1] OCS_N[1] OCS_N[2] PRTPWR[2] CRFILT VDD33 PRTPWR[3] OCS_N[3] OCS_N[4] PRTPWR[4] TEST LED_B_N[5] LED_A_N[6] / PRTSWP[6] SMSC USB2517/17i (Top View QFN-64) VDD33 USBDP_DN[1] / PRT_DIS_P[1] USBDP_DN[2] / PRT_DIS_P[2] USBDP_DN[3] / PRT_DIS_P[3] USBDP_DN[4] / PRT_DIS_P[4] VDD33 USBDP_DN[5] / PRT_DIS_P[5] CFG_SEL[2] LED_A_N[7] / PRTSWP[7] LED_B_N[7] USBDM_DN[1] / PRT_DIS_M[1] USBDM_DN[2] / PRT_DIS_M[2] USBDM_DN[3] / PRT_DIS_M[3] USBDM_DN[4] / PRT_DIS_M[4] Indicates pins on the bottom of the device. Figure 5.6 7-Port 64-Pin QFN SMSC USB251x 17 USBDM_DN[5] / PRT_DIS_M[5] LED_B_N[6] Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.1 Pin List in Alphabetical Order PIN NUMBERS 36 QFN USB2512 USB2512i USB2512A USB2512Ai USB2512B USB2512Bi USB2513B USB2513Bi USB2514B USB2514Bi USB2513 USB2513i USB2514 USB2514i 48QFN USB2513 USB2514 64 QFN USB2517 USB2517i 50 48 41 42 13 61 25 34 42 51 49 47 13 Enhanced Indicator Port LED Local Power Detection 18 SYMBOL BC_EN[1] BC_EN[2] BC_EN[3] BC_EN[4] BOOST[0] BOOST[1] CFG_SEL[0] CFG_SEL[1] CFG_SEL[2] CLKIN CRFILT GANG_EN NAME Battery Charging Strap Option - 12 16 - - 12 16 18 - - 12 16 18 20 36 24 31 32 33 45 17 22 - PHY Boost Strapping Option Configuration Programming Selection External Clock Input Core Regulator Filter Capacitor Ganged Port Power Strap Option Exposed Pad Tied to Ground (VSS) Hi-Speed Upstream Port Indicator Port LED Indicator 24 25 33 14 - Ground Pad ePad HS_IND 25 32 LED_A_N[1] LED_A_N[2] LED_A_N[3] LED_A_N[4] LED_A_N[5] LED_A_N[6] LED_A_N[7] LED_B_N[1] LED_B_N[2] LED_B_N[3] LED_B_N[4] LED_B_N[5] LED_B_N[6] LED_B_N[7] LOCAL_PWR - 37 25 23 33 31 17 15 36 24 22 12 50 48 34 32 18 16 14 28 39 45 Revision 1.0 (3-11-09) SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.1 Pin List in Alphabetical Order (continued) PIN NUMBERS 36 QFN USB2512 USB2512i USB2512A USB2512Ai USB2512B USB2512Bi USB2513B USB2513Bi USB2514B USB2514Bi USB2513 USB2513i USB2514 USB2514i 48QFN USB2513 USB2514 64 QFN USB2517 USB2517i 39 29 16 20 19 PLL Regulator Filter Capacitor Downstream Port Disable Strap Option Port Disable 9 2 4 7 9 12 54 56 8 34 1 3 6 8 11 53 55 46 21 26 28 45 40 28 27 22 21 35 38 37 62 SYMBOL NC NC NC NC NC NC NC NC NON_REM[0] NON_REM[1] OCS_N[1] OCS_N[2] OCS_N[3] OCS_N[4] OCS_N[5] OCS_N[6] OCS_N[7] PLLFILT PRT_DIS_M[1] PRT_DIS_M[2] PRT_DIS_M[3] PRT_DIS_M[4] PRT_DIS_M[5] PRT_DIS_M[6] PRT_DIS_M[7] PRT_DIS_P[1] PRT_DIS_P[2] PRT_DIS_P[3] PRT_DIS_P[4] PRT_DIS_P[5] PRT_DIS_P[6] PRT_DIS_P[7] NAME No Connect 6 7 18 19 8 9 20 21 28 22 13 17 8 9 11 12 13 27 28 - 11 NonRemovable Port Strap Option Over-Current Sense - SMSC USB251x 19 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.1 Pin List in Alphabetical Order (continued) PIN NUMBERS 36 QFN USB2512 USB2512i USB2512A USB2512Ai USB2512B USB2512Bi USB2513B USB2513Bi USB2514B USB2514Bi USB2513 USB2513i USB2514 USB2514i 48QFN USB2513 USB2514 64 QFN USB2517 USB2517i 29 26 23 27 20 30 39 36 38 51 49 47 13 USB Transceiver Bias Reset Input Serial Clock Serial Data Signal Select 48 MHz Clock Input System Management Bus Clock Server Message Block Data Signal Active/Suspend Status Indicator Test Pin USB Bus Data 35 47 33 31 17 15 63 43 41 40 41 40 45 19 58 59 SYMBOL PRTPWR[1] PRTPWR[2] PRTPWR[3] PRTPWR[4] PRTPWR[5] PRTPWR[6] PRTPWR[7] PRTPWR_POL NAME USB Port Power Enable 12 16 18 20 - 15 19 21 Port Power Polarity Strapping Port Swap Strapping Option - PRTSWP[1] PRTSWP[2] PRTSWP[3] PRTSWP[4] PRTSWP[5] PRTSWP[6] PRTSWP[7] RBIAS - 37 25 23 RESET_N SCL SDA 26 24 22 24 34 31 29 40 31 SEL48 SMBCLK SMBDATA 22 29 SUSP_IND TEST USBDM_UP USBDP_UP 28 11 30 31 39 14 42 43 Revision 1.0 (3-11-09) 20 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.1 Pin List in Alphabetical Order (continued) PIN NUMBERS 36 QFN USB2512 USB2512i USB2512A USB2512Ai USB2512B USB2512Bi USB2513B USB2513Bi USB2514B USB2514Bi USB2513 USB2513i USB2514 USB2514i 48QFN USB2513 USB2514 64 QFN USB2517 USB2517i 8 11 53 55 2 4 Upstream VBUS Power Detection 3.3 V Power 15 23 29 36 Crystal Input Crystal Output 33 32 45 44 27 35 9 7 9 12 54 56 44 24 46 52 57 64 61 60 SYMBOL USBDM_DN[1] USBDM_DN[2] USBDM_DN[3] USBDM_DN[4] USBDM_DN[5] USBDM_DN[6] USBDM_DN[7] USBDP_DN[1] USBDP_DN[2] USBDP_DN[3] USBDP_DN[4] USBDP_DN[5] USBDP_DN[6] USBDP_DN[7] VBUS_DET NAME Hi-Speed USB Data 1 3 8 6 - VDD33 VDD33 VDD33 VDD33 VDD33 VDD33 VDD33 XTALIN XTALOUT 5 10 18 30 41 48 SMSC USB251x 21 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet 5.2 USB251x Pin Descriptions (Grouped by Function) Table 5.2 USB251x Pin Descriptions BUFFER TYPE SYMBOL DESCRIPTION UPSTREAM USB 2.0 INTERFACES USBDM_UP USBDP_UP IO-U USB Data These pins connect to the upstream USB bus data signals (host, port, or upstream hub). VBUS_DET I/O12 Detect Upstream VBUS Power Detects state of Upstream VBUS power. The SMSC hub monitors VBUS_DET to determine when to assert the internal D+ pull-up resistor which signals a connect event. When designing a detachable hub, this pin should be connected to VBUS on the upstream port via a 2 to 1 voltage divider. For self-powered applications with a permanently attached host, this pin must be connected to 3.3 V (typically VDD33). DOWNSTREAM USB 2.0 INTERFACES USBDP_DN[x:1]/ PRT_DIS_P[x:1] IO-U Hi-Speed USB Data These pins connect to the downstream USB peripheral devices attached to the hub’s port. To disable, pull up with a 10 K resistor to 3.3 V. Downstream Port Disable Strap Option If this strap is enabled by package and configuration settings (see Table 8.1, "Hub Configuration Options"), then this pin will be sampled at RESET_N negation to determine if the port is disabled. To disable a port, pull up both PRT_DIS_M[x:1] and PRT_DIS_P[x:1] pins corresponding to the port numbers. USBDM_DN[x:1]/ PRT_DIS_M[x:1] PRTPWR[x:1] / O12 USB Power Enable Enables power to USB peripheral devices downstream. When PRTPWR_POL pin is unavailable, the hub supports active high power controllers only. When PRTPWR_POL pin is available, the active signal level of the PRTPWR pins is determined by the power polarity strapping function of the PRTPWR_POL pin. BC_EN[x] IPD Battery Charging Strap Option *This feature is only available on USB251xB/Bi. If this strap is enabled by package and configuration settings, (see Table 8.1, "Hub Configuration Options"), this pin will be sampled at RESET_N negation to determine if ports [x:1] support the battery charging protocol (and thus the supporting external port power controllers) that would enable a device to draw the currents per the USB battery charging specification. BC_EN[x] = 1: Battery charging feature is supported for port x BC_EN[x] = 0: Battery charging feature is not supported for port x Revision 1.0 (3-11-09) 22 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.2 USB251x Pin Descriptions (continued) BUFFER TYPE SYMBOL DESCRIPTION DOWNSTREAM USB 2.0 INTERFACES (continued) LED_A_N[x:1] / I/O12 Port LED Indicators This pin will be active low when LED support is enabled via EEPROM or SMBus. PRTSWP[x:1] Port Swap Strapping Option If this strap is enabled by package and configuration settings (see Table 8.1, "Hub Configuration Options"), this pin will be sampled at RESET_N negation to determine the electrical connection polarity of the downstream USB port pins (USB_DP and USB_DM). Also, the active state of the LED will be determined as follows: ‘0’ = Port polarity is normal, LED is active high. ‘1’ = Port polarity (USB_DP and USB_DM) is swapped, LED is active low. LED_B_N[7:4] I/O12 Enhanced Indicator Port LED for ports 4-7 Enhanced indicator LED for ports 4-7. This pin will be active low when LED support is enabled via EEPROM or SMBus. LED_B_N[3] / GANG_EN I/O12 Enhanced Indicator Port LED for Port 3 Ganged Power and Over-current strap option This signal selects between ganged or individual port power and over-current sensing. If this strap is enabled by package and configuration settings (see Table 8.1, "Hub Configuration Options"), this pin will be sampled at RESET_N negation to determine the mode as follows: ‘0’ = Individual sensing and switching, LED_B_N[3] is active high. ‘1’ = Ganged sensing and switching, LED_B_N[3] is active low. SMSC USB251x 23 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.2 USB251x Pin Descriptions (continued) BUFFER TYPE SYMBOL DESCRIPTION DOWNSTREAM USB 2.0 INTERFACES (continued) LED_B_N[2:1] / I/O12 Enhanced Indicator Port LED for ports 1 and 2 Enhanced indicator LED for ports 1 and 2. This pin will be active low when LED support is enabled via EEPROM or SMBus. BOOST[1:0] If this strap option is enabled by package and configuration settings (see Table 8.1, "Hub Configuration Options"), this pin will be sampled at RESET_N negation to determine if all PHY ports (upstream and downstream) operate at a normal or boosted electrical level. Also, the active state of the LEDs will be determined as follows: See Section 8.2.1.27, "Register F6h: Boost_Up," on page 45 and Section 8.2.1.29, "Register F8h: Boost_4:0," on page 47 for more information. BOOST[1:0] = BOOST_IOUT[1:0] BOOST[1:0] = ‘00’, LED_B_N[2] is active high, LED_B_N[1] is active high. BOOST[1:0] = ‘01’, LED_B_N[2] is active high, LED_B_N[1] is active low. BOOST[1:0] = ‘10’, LED_B_N[2] is active low, LED_B_N[1] is active high. BOOST[1:0] = ‘11’, LED_B_N[2] is active low, LED_B_N[1] is active low. PRTPWR_POL IPU Port Power Polarity Strapping Port Power Polarity strapping determination for the active signal polarity of the [x:1]PRTPWR pins. While RESET_N is asserted, the logic state of this pin will (through the use of internal combinatorial logic) determine the active state of the PRTPWR pins in order to ensure that downstream port power is not inadvertently enabled to inactive ports during a hardware reset. When RESET_N is negated, the logic value will be latched internally, and will retain the active signal polarity for the PRTPWR[x:1] pins. ‘1’ = PRTPWR[x:1]_P/N pins have an active ‘high’ polarity ‘0’ = PRTPWR[x:1]_P/N pins have an active ‘low’ polarity Warning: Active low port power controllers may glitch the downstream port power when the system power is first applied. Care should be taken when designing with active low components. When PRTPWR_POL is not an available pin on the package, the hub will only support active high power controllers. OCS_N[x:1] IPU Over-Current Sense Input from external current monitor indicating an over-current condition. RBIAS I-R USB Transceiver Bias A 12.0 kΩ (+/- 1%) resistor is attached from ground to this pin to set the transceiver’s internal bias settings. Revision 1.0 (3-11-09) 24 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.2 USB251x Pin Descriptions (continued) BUFFER TYPE SYMBOL DESCRIPTION SERIAL PORT INTERFACES SDA / SMBDATA / NON_REM[1] I/OSD12 Serial Data signal (SDA) Server Message Block Data signal (SMBDATA) Non-removable port strap option If this strap is enabled by package and configuration settings (see Table 8.1), this pin will be sampled (in conjunction with LOCAL_PWR / SUSP_IND / NON_REM[0]) at RESET_N negation to determine if ports [7:1] contain permanently attached (non-removable) devices: NON_REM[1:0] = ‘00’, All ports are removable. NON_REM[1:0] = ‘01’, Port 1 is non-removable. NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable. NON_REM[1:0] = ‘11’, When available, ports 1 2 & 3 are non-removable. RESET_N IS RESET Input The system can reset the chip by driving this input low. The minimum active low pulse is 1 μs. SCL / SMBCLK / CFG_SEL[0] I/OSD12 Serial Clock (SCL) System Management Bus Clock (SMBCLK) 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 8.1, "Hub Configuration Options". HS_IND / I/O12 Hi-Speed Upstream Port Indicator HS_IND: Hi-speed Indicator for upstream port connection speed. The active state of the LED will be determined as follows: CFG_SEL[1] = ‘0’, HS_IND is active high, CFG_SEL[1] = ‘1’, HS_IND is active low, ‘Asserted’ = the hub is connected at HS ‘Negated’ = the hub is connected at FS CFG_SEL[1] Configuration Programming Select CFG_SEL[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 8.1, "Hub Configuration Options". CFG_SEL[2] I Configuration Programming Select 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 8.1, "Hub Configuration Options". When the CFG_SEL[2] pin is unavailable, then the logic is internally tied to ‘0’. SMSC USB251x 25 Revision 1.0 (3-11-09) DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.2 USB251x Pin Descriptions (continued) BUFFER TYPE 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. CLKIN 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. XTALOUT OCLKx Crystal Output 24 MHz Crystal This is the other terminal of the crystal, or a no connect pin, when an external clock source is used to drive XTALIN/CLKIN. SUSP_IND / I/O Active/Suspend status LED Suspend Indicator: Indicates USB state of the hub. ‘negated’ = Unconfigured, or configured and in USB Suspend ‘asserted’ = the hub is configured, and is active (i.e., not in suspend) LOCAL_PWR / Local Power: Detects availability of local self-power source. Low = Self/local power source is NOT available (i.e., the hub gets all power from Upstream USB VBus). High = Self/local power source is available. NON_REM[0] NON_REM[0] Strap Option: If this strap is enabled by package and configuration settings (see Table 8.1, "Hub Configuration Options"), 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. Also, the active state of the LED will be determined as follows: NON_REM[1:0] = ‘00’, All ports are removable, and the LED is active high NON_REM[1:0] = ‘01’, Port 1 is non-removable, and the LED is active low NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable, and the LED is active high NON_REM[1:0] = ‘11’, When available, ports 1, 2 & 3 are non-removable, and the LED is active low TEST IPD TEST pin User must treat as a no connect pin or connect to ground. No trace or signal should be routed or attached to this pin. SYMBOL DESCRIPTION Revision 1.0 (3-11-09) 26 SMSC USB251x DATASHEET USB 2.0 Hi-Speed Hub Controller Datasheet Table 5.2 USB251x Pin Descriptions (continued) BUFFER TYPE I 48 MHz Clock Input Selection 48 MHz external input clock select. When the hub is clocked from an external clock source, this pin selects either 24 MHz or 48 MHz mode. ‘0’ = 24 MHz ‘1’ = 48 MHz POWER, GROUND, and NO CONNECTS CRFILT VDD Core Regulator Filter Capacitor This pin must have a 1.0 μF (or greater) ±20% (ESR