USB2512I

USB2512i Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller PRODUCT FEATURES General Description T h e S M S C 2 - P o r t H u b i s a l o w p o w e r, O E M configurable, STT (Single transaction translator) hub controller IC with 2 downstream ports for embedded USB solutions. The 2-port hub is fully compliant with the USB 2.0 Specification and will attach to an upstream port as a Full-Speed Hub or as a Full-/High-Speed Hub. The 2-Port Hub supports Low-Speed, Full- Speed, and High-Speed (if operating as a High-Speed Hub) downstream devices on all of the enabled downstream ports. Datasheet Programmable USB signal drive strength. Recover USB signal integrity due to compromised system environment using 2-level driving strength resolution Select the presence of a permanently hardwired USB peripheral device on a port by port basis Configure the delay time for filtering the over-current sense inputs Configure the delay time for turning on downstream port power Indicate the maximum current that the 2-port hub consumes from the USB upstream port Indicate the maximum current required for the hub controller Pin Selectable Options for Default Configuration — Select Downstream Ports as Non-Removable Ports General Features Hub Controller IC with 2 downstream ports Enhanced OEM configuration options available through either a single serial I2C EEPROM, or SMBus Slave Port 36-pin (6x6mm) QFN lead-free, RoHS compliant package Supports industrial temperature range of -40ºC - 85ºC Applications LCD monitors and TVs Multi-function USB peripherals PC mother boards Set-top boxes, DVD players, DVR/PVR Printers and scanners PC media drive bay Portable hub boxes Mobile PC docking Embedded systems Hardware Features Low power operation Full Power Management with individual or ganged power control of each downstream port On-chip Power On Reset (POR) Internal 1.8V Voltage Regulator Fully integrated USB termination and Pull-up/Pulldown resistors On Board 24MHz Crystal Driver, Resonator or External 24MHz clock input Enhanced EMI rejection and ESD protection performance OEM Selectable Features Customize Vendor ID, Product ID, and Device ID Select whether the hub is part of a compound device (When any downstream port is permanently hardwired to a USB peripheral device, the hub is part of a compound device) Flexible port mapping and disable sequence. Ports can be disabled/reordered in any order to support multiple product SKUs. Hub will automatically reorder the remaining ports to match the Host controller's numbering scheme. Programmable USB differential-pair pin location. Ease PCB layout by aligning USB signal lines directly to connectors SMSC USB2512i DATASHEET Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet ORDER NUMBER(S): USB2512i-AEZG FOR 36 PIN, QFN LEAD-FREE ROHS COMPLIANT PACKAGE 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2007 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 1.92 (11-28-07) DATASHEET 2 SMSC USB2512i Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Table of Contents Chapter 1 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter 2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Chapter 3 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 3.2 PIN Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Chapter 4 Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 4.2 2-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1.1 Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1.2 VBus Detect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EEPROM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2.1 Internal Register Set (Common to EEPROM and SMBus) . . . . . . . . . . . . . . . . . . . . . . . 4.2.2 I2C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.2.3 In-Circuit EEPROM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMBus Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.1 Bus Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.2 Invalid Protocol Response Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.3 General Call Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.4 Slave Device Time-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.5 Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.6 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.7 Bus Reset Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.3.8 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Default Configuration Option: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Default Strapping Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6.1 Internal POR Hardware Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6.2 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6.3 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 13 13 13 13 24 25 25 25 26 26 26 27 27 27 27 27 27 27 27 28 30 4.3 4.4 4.5 4.6 Chapter 5 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 5.1 5.2 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Recommended Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Chapter 6 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 6.1 Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1.1 SMBus Interface: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1.2 I2C EEPROM: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 36 36 36 Chapter 7 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 SMSC USB2512i DATASHEET 3 Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet List of Figures Figure 1.1 Figure 2.1 Figure 4.1 Figure 4.2 Figure 4.3 Figure 4.4 Figure 4.5 Figure 6.1 Figure 6.2 Figure 7.1 USB2512i 36-Pin QFN (Embedded Footprint) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 USB2512i Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Block Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Block Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Typical Crystal Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Formula to find value of C1 and C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 36-Pin QFN, 6x6mm Body, 0.5mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Revision 1.92 (11-28-07) DATASHEET 4 SMSC USB2512i Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet List of Tables Table 3.1 Table 3.2 Table 3.3 Table 3.4 Table 4.1 Table 4.2 Table 4.3 Table 4.4 Table 4.5 Table 5.1 Table 5.2 USB2512i Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 USB2512i Power, Ground, and No Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 USB2512i Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Internal Default, EEPROM and SMBus Register Memory Map. . . . . . . . . . . . . . . . . . . . . . . . 13 Port Remap Register for Ports 1 & 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Reset_N Timing for Default/Strap Option Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Pin Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 SMSC USB2512i DATASHEET 5 Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Chapter 1 Pin Configuration SDA/SMBDATA/NON_REM1 SCL/SMBCLK/CFG_SEL0 HS_IND/CFG_SEL1 VBUS_DET RESET_N VDD33 NC NC 27 26 25 24 23 22 21 20 SUSP_IND/LOCAL_PWR/NON_REM0 VDDA33 USBUP_DM USBUP_DP XTAL2 XTAL1/CLKIN VDD18PLL RBIAS VDD33PLL 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 OCS2_N PRTPWR2 VDD33CR VDD18 OCS1_N PRTPWR1 TEST VDDA33 SMSC USB2512i Embedded Footprint (Top View QFN-36) Thermal Slug (must be connected to VSS) USBDN1_DP USBDN1_DM USBDN2_DM USBDN2_DP NC NC NC Indicates pins on the bottom of the device. Figure 1.1 USB2512i 36-Pin QFN (Embedded Footprint) Revision 1.92 (11-28-07) DATASHEET 6 VDDA33 NC SMSC USB2512i Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Chapter 2 Block Diagram T o U p stre a m V BUS U p stre a m U S B D a ta 3 .3 V 2 4 M H z C rysta l 1 .8 V To EEPR O M or S M B u s M a ste r SD SCK PLL B u s -P o w e r D e te c t/V B U S P u ls e U p s tre a m PHY 1 .8 V R e g S e ria l In te rfa c e R e p e a te r S IE C o n tro lle r TT P o rt C o n tro lle r R o u tin g & P o rt R e -O rd e rin g L o g ic P o rt # 1 PH Y#1 OC S en se S w itch D riv er LED D rive rs P o rt # 2 PH Y#2 OC S en s e S w itc h D rive r LED D rivers U S B D a ta O C S e nse D ow n strea m S w itch /LE D D rive rs U S B D a ta D ow n strea m O C S en se S w itch/L E D D rivers Figure 2.1 USB2512i Block Diagram SMSC USB2512i DATASHEET 7 Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Chapter 3 Pin Descriptions 3.1 PIN Descriptions This section provides a detailed description of each signal. The signals are arranged in functional groups according to their associated interface. 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 before the signal name, the signal is asserted when 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. Table 3.1 USB2512i Pin Descriptions QFN-36 EMB BUFFER TYPE UPSTREAM USB INTERFACES USBUP_DP USBUP_DM 31 30 IO-U USB Bus Data These pins connect to the upstream USB bus data signals (Host port, or upstream hub). 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 (signaling a connect event). When designing a detachable hub, this pin must be connected to the VBUS power pin of the USB port that is upstream of the hub. For self-powered applications with a permanently attached host, this pin must be connected to 3.3V (typically VDD33). DOWNSTREAM 2-PORT USB 2.0 INTERFACE USBDN_DP[2:1]/ & USBDN_DM[2:1]/ PRTPWR[2:1] 4 2 3 1 16 12 O12 IO-U High-Speed USB Data These pins connect to the downstream USB peripheral devices attached to the hub’s port. USB Power Enable Enables power to USB peripheral devices downstream. Note: The hub supports active high power controllers only! OCS[2:1]_N 17 13 IPU Over Current Sense Input from external current monitor indicating an over-current condition. {Note: Contains internal pull-up to 3.3V supply} I-R USB Transceiver Bias A 12.0kΩ (+/- 1%) resistor is attached from ground to this pin to set the transceiver’s internal bias settings. Revision 1.92 (11-28-07) SYMBOL DESCRIPTION VBUS_DET 27 RBIAS 35 DATASHEET 8 SMSC USB2512i Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Table 3.1 USB2512i Pin Descriptions (continued) QFN-36 EMB BUFFER TYPE SERIAL PORT INTERFACE SDA/ SMBDATA/ NON_REM1 22 I/OSD12 Serial Data / SMB Data & Port Non Removable Strap Option NON_REM1: Non removable port strap option. If this strap is enabled by package and configuration settings (see Table 3.2), this pin will be sampled (in conjunction with LOCAL_PWR/SUSP_IND/NON_REM0) at RESET_N negation to determine if imports [2:1] contain permanently attached (non-removable) devices: NON_REM[1:0] = ‘00’, All ports are removable. NON_REM[1:0] = ‘01’, Port 1 is nonremovable. NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable. NON_REM[1:0] = ‘11’, Ports 1 & 2 are non-removable. SCL/ SMBCLK/ CFG_SEL0 24 I/OSD12 Serial Clock (SCL) SMBus Clock (SMBCLK) Configuration Select_SEL0: 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 3.2, "SMBus or EEPROM Interface Behavior". 25 I/O12 High-Speed Upstream port indictor & Configuration Programming Select HS_IND: High Speed Indicator for upstream port connection speed. The active state of the LED will be determined as follows: CFG_SEL1 = ‘0’, HS_IND is active high, CFG_SEL1 = ‘1’, HS_IND is active low, ‘Asserted’ = Hub is connected at HS ‘Negated’ = Hub is connected at FS CFG_SEL1: 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 3.2, "SMBus or EEPROM Interface Behavior". MISC XTAL1/ CLKIN 33 ICLKx Crystal Input/External Clock Input 24MHz crystal or external clock input. This pin connects to either one terminal of the crystal or to an external 24MHz clock when a crystal is not used. SYMBOL DESCRIPTION HS_IND/ CFG_SEL1 SMSC USB2512i DATASHEET 9 Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Table 3.1 USB2512i Pin Descriptions (continued) QFN-36 EMB 32 BUFFER TYPE OCLKx Crystal Output 24MHz Crystal This is the other terminal of the crystal, or a NO-CONNECT when an external clock source is used to drive XTAL1/CLKIN. This output must not be used to drive any external circuitry other than the crystal circuit. RESET_N 26 IS RESET Input The system can reset the chip by driving this input low. The minimum active low pulse is 1 us. When the RESET_N pin is pulled to VDD33, the internal POR (Power on Reset) is enabled and no external reset circuitry is required. The internal POR holds the internal logic in reset until the power supplies are stable. SUSP_IND/ LOCAL_PWR/ NON_REM0 28 I/O Active/Suspend status LED or Local-Power & Non Removable Strap Option Suspend Indicator: 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. Low = Self/local power source is NOT available (i.e., Hub gets all power from Upstream USB VBus). High = Self/local power source is available. NON_REM0 Strap Option: If this strap is enabled by package and configuration settings (see Table 3.2), this pin will be sampled (in conjunction with NON_REM1) at RESET_N negation to determine if ports [2:1] 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 nonremovable, 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’, Ports 1 & 2 are non-removable, and the LED is active low TEST 11 IPD TEST pin Used for testing the chip. User must treat as a no-connect or connect to ground. SYMBOL XTAL2 DESCRIPTION Table 3.2 SMBus or EEPROM Interface Behavior CFG_SEL1 0 CFG_SEL0 0 SMBUS OR EEPROM INTERFACE BEHAVIOR Internal Default Configuration Strap Options Enabled Revision 1.92 (11-28-07) DATASHEET 10 SMSC USB2512i Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Table 3.2 SMBus or EEPROM Interface Behavior (continued) CFG_SEL1 0 CFG_SEL0 1 SMBUS OR EEPROM INTERFACE BEHAVIOR Configured as an SMBus slave for external download of user-defined descriptors. SMBus slave address 58 (0101100x) Strap Options Disabled All Settings Controlled by Registers Internal Default Configuration Strap Options Enabled Bus Power Operation 2-Wire I2C EEPROMS are supported. Strap Options Disabled All Settings Controlled by Registers Table 3.3 USB2512i Power, Ground, and No Connect PACKAGE SYMBOL VDD18 36-QFN EMB 14 VDD Core This pin must have a 1.0μF (or greater) ±20% (ESR