USB2502 2-Port USB 2.0 Hub Controller PRODUCT FEATURES Datasheet Integrated USB 2.0 Compatible 2-Port Hub -- High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and Low-Speed (1.5Mbits/s) compatible -- Full power management with ganged power control -- Detects Bus-Power/Self-Power source and changes mode automatically Complete USB Specification 2.0 Compatibility VID/PID/DID, and Port Configuration for Hub via: -- Includes USB 2.0 Transceivers Default VID/PID/DID, allows functionality when configuration EEPROM is absent Hardware Strapping options allow for configuration without an external EEPROM or SMBus Host SMSC USB2502 -- Single Serial I2C EEPROM -- SMBus Slave Port On-Board 24MHz Crystal Driver Circuit or 24 MHz external clock driver Internal PLL for 480MHz USB 2.0 Sampling Internal 1.8V Linear Voltage Regulator Integrated USB termination and Pull-up/Pull-down resistors Internal Short Circuit protection of USB differential signal pins Basic single-color LED support 1.8 Volt Low Power Core Operation 3.3 Volt I/O with 5V Input Tolerance 36 Pin QFN or 48 Pin TQFP lead-free RoHS compliant package DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet ORDER NUMBERS: USB2502-AEZG FOR 36 PIN LEAD-FREE ROHS COMPLIANT QFN PACKAGE; USB2502-HT FOR 48 PIN LEADFREE ROHS COMPLIANT TQFP PACKAGE 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright (c) 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 2.3 (08-27-07) 2 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Table of Contents Chapter 1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1 OEM Selectable Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter 2 Pin Table 2-Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Chapter 3 Pin Configuration 2-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Chapter 4 2-Port Hub Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Chapter 5 Functional Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.1 5.2 5.3 5.4 5.5 5.6 2-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1 Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.2 VBus Detect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EEPROM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.1 I2C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.2 In-Circuit EEPROM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.2.3 EEPROM DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMBus Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.1 Bus Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.2 Invalid Protocol Response Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.3 General Call Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.4 Slave Device Time-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.5 Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.6 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.7 Bus Reset Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.8 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.9 Internal SMBus Memory Register Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Default Configuration Option: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Default Strapping Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6.1 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.6.2 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 16 18 19 19 19 19 24 24 25 25 26 26 26 26 26 26 32 32 32 33 36 Chapter 6 XNOR Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Chapter 7 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 7.1 7.2 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Recommended Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Chapter 8 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 8.1 Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.1 SMBus Interface: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.2 I2C EEPROM: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.1.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 42 42 42 Chapter 9 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 SMSC USB2502 3 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet List of Tables Table 2.1 Table 2.2 Table 4.1 Table 4.2 Table 4.3 Table 4.4 Table 4.5 Table 5.1 Table 5.2 Table 5.3 Table 5.4 Table 5.5 Table 5.6 Table 5.7 Table 7.1 Table 9.1 2-Port Pin Table for 36-QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2-Port Pin Table for 48-TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2-Port Hub Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Miscellaneous Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Power, Ground, and No Connect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 User-Defined Descriptor Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 SMBus Write Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 SMBus Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 SMBus Slave Interface Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Reset_N Timing for Default/Strap Option Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 48 Pin TQFP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Revision 2.3 (08-27-07) 4 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet List of Figures Figure 3.1 Figure 3.2 Figure 4.1 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 9.1 Figure 9.2 2-Port 36-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2-Port 48-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2-Port Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 LED Strapping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 36 Pin QFN Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 48 Pin TQFP Package Outline (7x7x1.4 mm body, 2mm Footprint) . . . . . . . . . . . . . . . . . . . 44 SMSC USB2502 5 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Chapter 1 General Description The SMSC 2-Port Hub is fully compliant with the USB 2.0 Specification and will attach to a USB host 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. The Hub works with an external USB power distribution switch device to control VBUS switching to downstream ports, and to limit current and sense over-current conditions. 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 pull-up resistors. Throughout this document the upstream facing port of the hub will be referred to as the upstream port, and the downstream facing ports will be called the downstream ports. 1.1 OEM Selectable Features A default configuration is available in the USB2502 following a reset. This configuration may be sufficient for some applications. Strapping option pins make it possible to modify a limited sub-set of the configuration options. The USB2502 may also 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 2-Port Hub supports several OEM selectable features: Operation as a Self-Powered USB Hub or as a Bus-Powered USB Hub. Operation as a Dynamic-Powered Hub (Hub operates as a Bus-Powered device if a local power source is not available and switches to Self-Powered operation when a local power source is available). Optional OEM configuration via I2C EEPROM or via the industry standard SMBus interface from an external SMBus Host. Compound device support (port is permanently hardwired to a downstream USB peripheral device). Hardware strapping options enable configuration of the following features. Non-Removable Ports Port Power Polarity (active high or active low logic) Revision 2.3 (08-27-07) 6 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Chapter 2 Pin Table 2-Port Table 2.1 2-Port Pin Table for 36-QFN UPSTREAM USB 2.0 INTERFACE (3 PINS) USBDP0 USBDN0 VBUS_DET 2-PORT USB 2.0 INTERFACE (10 PINS) USBDP1 USBDN1 USBDP2 USBDN2 GR1/ NON_REM0 GR2/ NON_REM1 PRTPWR_POL RBIAS PRTPWR OCS_N SERIAL PORT INTERFACE (3 PINS) SDA/SMBDATA SCL/SMBCLK/ CFG_SEL0 CFG_SEL1 MISC (7 PINS) XTAL1/CLKIN XTAL2 RESET_N ATEST/ REG_EN CLKIN_EN TEST SELF_PWR POWER, GROUND (13 PINS) SMSC USB2502 7 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Table 2.2 2-Port Pin Table for 48-TQFP UPSTREAM USB 2.0 INTERFACE (3 PINS) USBDP0 USBDN0 VBUS_DET 2-PORT USB 2.0 INTERFACE (10 PINS) USBDP1 USBDN1 USBDP2 USBDN2 GR1/ NON_REM0 GR2/ NON_REM1 PRTPWR_POL RBIAS PRTPWR OCS_N SERIAL PORT INTERFACE (3 PINS) SDA/SMBDATA SCL/SMBCLK CFG_SEL0 CFG_SEL1 MISC (7 PINS) XTAL1/CLKIN XTAL2 RESET_N ATEST/ REG_EN CLKIN_EN TEST SELF_PWR POWER, GROUND AND NO CONNECT (25 PINS) Revision 2.3 (08-27-07) 8 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet VDD18 VSS VBUS_DET RESET_N TEST CLKIN_EN CFG_SEL1 SCL/SMBCLK/CFG_SEL0 SDA/SMBDATA 27 26 25 24 23 22 21 20 19 Chapter 3 Pin Configuration 2-Port Hub VDD33CR 28 18 VDD18 VSS 29 17 VSS XTAL2 30 16 SELF_PWR XTAL1/CLKIN 31 15 OCS_N VDDA18PLL 32 14 PRTPWR VDDA33PLL 33 13 PRTPWR_POL ATEST/REG_EN 34 12 GR2/NON_REM1 11 GR1/NON_REM0 10 VSS 2 3 4 5 6 7 8 9 USBDN0 VSS USBDN1 USBDP1 VDDA33 USBDP2 USBDN2 36 USBDP0 VSS 1 35 Thermal Slug (must be connected to VSS) VDDA33 RBIAS SMSC USB2502 (Top View QFN-36) Indicates pins on the bottom of the device. Figure 3.1 2-Port 36-Pin QFN SMSC USB2502 9 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller 9''&5 1& 6'$60%'$7$ 6&/60%&/.&)*B6(/ &)*B6(/ &/.,1B(1 7(67 5(6(7 9%86B'(7 966 966 9'' 1& Datasheet 9''&5 1& 1& 966 1& 966 9'' ;7$/ 966 86% 74)3 ;7$/&/.,1 9''$3// 1& 6(/)B3:5 9''$3// 2&6B1 9''$3// 3573:5 3573:5B32/ $7(675(*B(1 *5121B5(0 5%,$6 *5121B5(0 86%'1 86%'3 9''$ 9''$ 86%'3 86%'1 966 966 86%'1 86%'3 9''$ 966 966 Figure 3.2 2-Port 48-Pin TQFP Revision 2.3 (08-27-07) 10 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Chapter 4 2-Port Hub Block Diagram Upstream USB Data 8SVWUHDP VBUS 24 MHz Crystal To EEPROM or SMBus Master PLL Bus-Power 'HWHFW SD 1.8V 3.3V Upstream PHY 1.8V Reg Repeater SIE SCK Serial Interface Controller Port Controller Transaction Translator Routing Logic OC Sense Switch Driver LED Driver Strapping Options Downstream PHY #1 Downstream USB Data OC Sense Switch/LED Driver/optis Downstream PHY #2 Downstream USB Data Figure 4.1 2-Port Block Diagram Table 4.1 2-Port Hub Pin Descriptions NAME SYMBOL TYPE FUNCTION UPSTREAM USB 2.0 INTERFACE USB Bus Data USBDN0 USBDP0 IO-U These pins connect to the upstream USB bus data signals. Detect Upstream VBUS Power VBUS_DET I/O8 Detects state of Upstream VBUS power. The SMSC Hub monitors VBUS_DET to determine when to assert the internal D+ pull-up resistor (signalling 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. (Use of a weak pull-down resistor is recommended.) For self-powered applications with a permanently attached host, this pin must be pulled-up to either 3.3V or 5.0V (typically VDD33). SMSC USB2502 11 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Table 4.1 2-Port Hub Pin Descriptions (continued) NAME SYMBOL TYPE FUNCTION 2-PORT USB 2.0 HUB INTERFACE High-Speed USB Data USBDN[2:1] USBDP[2:1] IO-U USB Power Enable PRTPWR O8 Port [2:1] Green LED & Port NonRemovable strapping option. GR[2:1]/ NON_REM[1:0] These pins connect to the downstream USB peripheral devices attached to the Hub's ports. Enables power to USB peripheral devices (downstream). The active signal level of the PRTPWR pin is determined by the Power Polarity Strapping function of the PRTPWR_POL pin. I/O8 Green indicator LED for ports 2 and 1. Will be active low when LED support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration, these pins will be sampled at the rising edge of RESET_N (see the applicable RESET_N timing table in Section 5.6.1) to determine if ports [2:1] contain permanently attached (non-removable) devices. Also, the active state of the LED's will be determined as follows: NON_REM[1:0] = `00', All ports are removable, GR2 is active high, GR1 is active high. NON_REM1:0] = `01', Port 1 is non-removable, GR2 is active high, GR1 is active low. NON_REM[1:0] = `10', Ports 1 & 2 are non-removable, GR2 is active low, GR1 is active high. NON_REM[1:0] = `11', Ports 1 & 2 are non-removable, GR2 is active low, GR1 is active low. Port Power Polarity strapping. PRTPWR_POL I/O8 Port Power Polarity strapping determination for the active signal polarity of the PRTPWR pin. While RESET_N is asserted, the logic state of this pin will (though the use of internal combinatorial logic) determine the active state of the PRTPWR pin in order to ensure that downstream port power is not inadvertently enabled to inactive ports during a hardware reset. On the rising edge of RESET_N (see the applicable RESET_N timing table in Section 5.6.1), the logic value will be latched internally, and will retain the active signal polarity for the PRTPWR pin. `1' = PRTPWR pin has an active `high' polarity `0' = PRTPWR pin has an active `low' polarity Over Current Sense OCS_N IPU Input from external current monitor indicating an overcurrent condition. {Note: Contains internal pull-up to 3.3V supply} USB Transceiver Bias RBIAS I-R A 12.0k (+/- 1%) resistor is attached from ground to this pin to set the transceiver's internal bias settings. Revision 2.3 (08-27-07) 12 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Table 4.1 2-Port Hub Pin Descriptions (continued) NAME SYMBOL TYPE FUNCTION SERIAL PORT INTERFACE Serial Data/SMB Data SDA/SMBDATA IOSD12 (Serial Data)/(SMB Data) signal. Serial Clock/SMB Clock & Config Select 0 SCL/SMBCLK/ CFG_SEL0 IOSD12 (Serial Clock)/(SMB Clock) signal. This multifunction pin is read on the rising edge of RESET_N (see the applicable RESET_N timing table in Section 5.6.1) and will determine the hub configuration method as described in Table 4.2. Configuration Programming Select CFG_SEL1 I This pin is read on the rising edge of RESET_N (see the applicable RESET_N timing table in Section 5.6.1) and will determine the hub configuration method as described in Table 4.2. Table 4.2 SMBus or EEPROM Interface Behavior CFG_SEL1 CFG_SEL0 SMBus or EEPROM interface behavior. 0 0 Reserved 0 1 Configured as an SMBus slave for external download of userdefined descriptors. SMBus slave address is 0101100 1 0 Internal Default Configuration via strapping options. 1 1 2-wire (I2C) EEPROMS are supported, Table 4.3 Miscellaneous Pins NAME SYMBOL TYPE FUNCTION Crystal Input/External Clock Input XTAL1/ CLKIN ICLKx 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. Crystal Output XTAL2 OCLKx 24MHz Crystal This is the other terminal of the crystal, or left unconnected when an external clock source is used to drive XTAL1/CLKIN. It must not be used to drive any external circuitry other than the crystal circuit. Clock Input Enable CLKIN_EN I Clock In Enable: Low = XTAL1 and XTAL2 pins configured for use with external crystal High = XTAL1 pin configured as CLKIN, and must be driven by an external CMOS clock. RESET Input RESET_N IS This active low signal is used by the system to reset the chip. The minimum active low pulse is 1us. Self-Power / Bus-Power Detect SELF_PWR I 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. TEST Pin TEST IPD SMSC USB2502 Used for testing the chip. User must treat as a noconnect or connect to ground. 13 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Table 4.3 Miscellaneous Pins (continued) NAME SYMBOL TYPE FUNCTION Analog Test & Internal 1.8V voltage regulator enable ATEST/ REG_EN AIO This signal is used for testing the analog section of the chip, and to enable or disable the internal 1.8v regulator. This pin must be connected to VDDA33 to enable the internal 1.8V regulator, or to VSS to disable the internal regulator. When the internal regulator is enabled, the 1.8V power pins must be left unconnected, except for the required bypass capacitors.When the PHY is in test mode, the internal regulator is disabled and the ATEST pin functions as a test pin. Table 4.4 Power, Ground, and No Connect NAME SYMBOL VDDCORE3P3 VDD33CR TYPE FUNCTION +3.3V I/O Power. If the internal core 1.8V regulator is enabled, then this pin acts as the regulator input VDD1P8 VDD18 +1.8V core power. If the internal regulator is enabled, then VDD18 pin 27 must have a 4.7F (or greater) 20% (ESR <0.1) capacitor to VSS VDDAPLL3P3 VDDA33PLL +3.3V Filtered analog power for the internal PLL If the internal PLL 1.8V regulator is enabled, then this pin acts as the regulator input VDDAPLL1P8 VDDA18PLL +1.8V Filtered analog power for internal PLL. If the internal regulator is enabled, then this pin must have a 4.7F (or greater) 20% (ESR <0.1) capacitor to VSS VDDA3P3 VDDA33 VSS VSS +3.3V Filtered analog power. Ground. Table 4.5 Buffer Type Descriptions BUFFER I DESCRIPTION Input. IPD Input, with a weak Internal pull-down. IPU Input, with a weak Internal pull-up. IS Input with Schmitt trigger. I/O8 Input/Output 8mA O8 Output 8mA Revision 2.3 (08-27-07) 14 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Table 4.5 Buffer Type Descriptions (continued) BUFFER DESCRIPTION IOSD12 Open drain....12mA sink with Schmitt trigger, and must meet I2C-Bus Specification Version 2.1 requirements. ICLKx XTAL Clock Input OCLKx XTAL Clock Output I-R RBIAS IO-U Defined in USB Specification. Note: Meets USB 1.1 requirements when operating as a 1.1-compliant device and meets USB 2.0 requirements when operating as a 2.0-compliant device. AIO Analog Input/output. Per PHY test requirements. SMSC USB2502 15 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Chapter 5 Functional Block Description 5.1 2-Port Hub SMSC's USB 2.0 2-Port Hub is fully specification compliant to the Universal Serial Bus Specification Revision 2.0 April 27,2000 (12/7/2000 and 5/28/2002 Errata). Please reference Chapter 11 (Hub Specification) for general details regarding Hub operation and functionality. For performance reasons, the 2-Port Hub provides 1 Transaction Translator (TT) per port (defined as Multi-TT configuration), divided into 4 non-periodic buffers per TT. 5.1.1 Hub Configuration Options The SMSC Hub supports a large number of features and must be configured in order to correctly function when attached to a USB host controller. There are three principal ways to configure the hub: SMBus, EEPROM, or by internal default settings. In all cases, the configuration method will be determined by the CFG_SEL1 and CFG_SEL0 pins immediately after RESET_N negation. 5.1.1.1 Vendor ID Is a 16-bit value that uniquely identifies the Vendor of the user device (assigned by USB-Interface Forum). This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, SMSC's VID (see Table 5.1) will be reported. 5.1.1.2 Product ID Is a 16-bit value that the Vendor can assign that uniquely identifies this particular product (assigned by OEM). This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, SMSC's PID designation of (see Table 5.1) will be reported. 5.1.1.3 Device ID Is a 16-bit device release number in BCD format (assigned by OEM). This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, SMSC's DID designation of (see Table 5.1) will be reported. 5.1.1.4 Self-Powered/Bus-Powered The Hub is either Self-Powered (draws less than 2mA of upstream bus power) or Bus-Powered (limited to a 100mA 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 100mA of current prior to being configured. After configuration, the Bus-Powered SMSC Hub (along with all associated hub circuitry, any embedded devices if part of a compound device, and 100mA per externally available downstream port) must consume no more than 500mA of upstream VBUS current. The current consumption is system dependent, and the OEM must ensure that the USB 2.0 specifications are not violated. When configured as a Self-Powered device, <1mA of upstream VBUS current is consumed and all 7 ports are available, with each port being capable of sourcing 500mA of current. This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the SELF_PWR pin determines the Self-powered or Bus-powered status. Please see the description under Dynamic Power for the self/bus power functionality when dynamic power switching is enabled. Revision 2.3 (08-27-07) 16 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 5.1.1.5 High-Speed Disable Allows an OEM to force the Hub to configure as a Full-Speed device only (i.e. High-Speed not available). This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.6 EOP Disable During FS operation only, this permits the Hub to send EOP if no downstream traffic is detected at EOF1. See Section 11.3.1 of the USB 2.0 Specification for additional details. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.7 Current Sensing Selects current sensing as all ports ganged, or none. This field can be set by the OEM using either the SMBus or EEPROM interface options.When using the internal default option, the SELF_PWR pin determines if current sensing will be ganged, or none (ganged if self-powered, none if bus-powered) 5.1.1.8 Compound Device Allows the OEM to indicate that the Hub is part of a compound (see the USB Specification for definition) device. The applicable port(s) must also be defined as having a "Non-Removable Device". This field is set by the OEM using either the SMBus or EEPROM interface options. Note: When configured via strapping options, declaring a port as non-removable automatically causes the hub controller to report that it is part of a compound device. 5.1.1.9 Non-Removable Device Informs the Host if one of the active ports has a permanent device that is undetachable from the Hub. (Note: The device must provide its own descriptor data.) This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the NON_REM[1:0] pins will designate the appropriate ports as being nonremovable. 5.1.1.10 Self-Powered Port DISABLE During Self-Powered operation, this selects the ports which will be permanently disabled, and are not available to be enabled or enumerated by a Host Controller. The disabled ports must be in decreasing order starting with port 2. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.11 Bus-Powered Port DISABLE During Bus-Powered operation, this selects the ports which will be permanently disabled, and are not available to be enabled or enumerated by a Host Controller. The disabled ports must be in decreasing order starting with port 2. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.12 Dynamic Power Controls the ability of the 2-Port Hub to automatically change from Self-Powered operation to BusPowered operation if the local power source is removed or is unavailable (and from Bus-Powered to Self-Powered if the local power source is restored). {Note: If the local power source is available, the 2-port Hub will always switch to Self-Powered operation.} SMSC USB2502 17 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet When Dynamic Power switching is enabled, the Hub detects the availability of a local power source by monitoring the external SELF_PWR pin. If the Hub detects a change in power source availability, the Hub immediately disconnects and removes power from all downstream devices and disconnects the upstream port. The Hub will then re-attach to the upstream port as either a Bus-Powered Hub (if local-power in unavailable) or a Self-Powered Hub (if local power is available). This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.13 Over-Current Timer The time delay (in 2ms increments) for an over-current condition to persist before it is reported to the Host. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.14 Self-Powered Max Power When in Self-Powered configuration, Sets value in 2mA increments. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.15 Bus-Powered Max Power When in Bus-Powered configuration, Sets value in 2mA increments. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.16 Self-powered Hub Controller Current When in Self-Powered configuration, Maximum current requirements of the Hub Controller in 2mA increments. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.17 Bus-Powered Hub Controller Current When in Bus-Powered configuration, Maximum current requirements of the Hub Controller in 2mA increments. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.18 Power-On Timer Time (in 2ms intervals) from the time power-on sequence begins on a port until power is good on that port. System software uses this value to determine how long to wait before accessing a powered-on port. This field is set by the OEM using either the SMBus or EEPROM interface options. 5.1.1.19 Power Switching Polarity The selection of active state "polarity" for the PRTPWR2 pin is made by a strapping option only. 5.1.2 VBus Detect According to Section 7.2.1 of the USB 2.0 Specification, a downstream port can never provide power to its D+ or D- pull-up resistors unless the upstream port's VBUS is in the asserted (powered) state. The VBUS_DET pin on the Hub monitors the state of the upstream VBUS signal and will not pull-up the D+ or D- resistor if VBUS is not active. If VBUS goes from an active to an inactive state (Not Powered), Hub will remove power from the D+ or D- pull-up resistor within 10 seconds. Revision 2.3 (08-27-07) 18 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 5.2 EEPROM Interface The SMSC Hub can be configured via a 2-wire (I2C) EEPROM. (Please see Table 4.1, "7-Port Hub Pin Descriptions" for specific details on how to enable the I2C EEPROM option). The Internal state-machine will, (when configured for EEPROM support) read the external EEPROM for configuration data. The hub will then "attach" to the upstream USB host. Please see Table 5.1 User-Defined Descriptor Data for a list of data fields available. 5.2.1 I2C EEPROM The I2C EEPROM interface implements a subset of the I2C Master Specification (Please refer to the Philips Semiconductor Standard I2C-Bus Specification for details on I2C bus protocols). The Hub's I2C EEPROM interface is designed to attach to a single "dedicated" I2C EEPROM, and it conforms to the Standard-mode I2C Specification (100kbit/s transfer rate and 7-bit addressing) for protocol and electrical compatibility. Note: Extensions to the I2C Specification are not supported. 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. 5.2.1.1 Implementation Characteristics Please refer to the MicroChip 24AA00 DataSheet for Protocol and Programming specifics. 5.2.1.2 Pull-Up Resistor The Circuit board designer is required to place external pull-up resistors (10K recommended) on the SDA/SMBDATA & SCL/SMBCLK/CFG_SELO lines (per SMBus 1.0 Specification, and EEPROM manufacturer guidelines) to Vcc in order to assure proper operation. 5.2.1.3 I2C EEPROM Slave Address Slave address is 1010000. Note: 10-bit addressing is NOT supported. 5.2.2 In-Circuit EEPROM Programming The EEPROM can be programmed via ATE by pulling RESET_N low (which tri-states the Hub's EEPROM interface and allows an external source to program the EEPROM). 5.2.3 EEPROM DATA Table 5.1 User-Defined Descriptor Data DEFAULT CFG SELF (HEX) DEFAULT CFG BUS (HEX) 2 0424 0424 Vendor ID (assigned by USB-IF). 3:2 2 2502 2502 Product ID (assigned by Manufacturer). 5:4 2 0000 0000 Device ID (assigned by Manufacturer). BYTE MSB: LSB SIZE (BYTES) VID 1:0 PID DID FIELD SMSC USB2502 19 DATASHEET DESCRIPTION Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Table 5.1 User-Defined Descriptor Data (continued) DEFAULT CFG SELF (HEX) DEFAULT CFG BUS (HEX) 1 88 0C Configuration data byte #1 for Hub options. 7 1 90 90 Configuration data byte #2 for Hub options. Non Removable Device 8 1 00 00 Defines the ports that contain attached devices (this is used only when Hub is part of a compound device). Port Disable Self-Powered 9 1 00 00 Selects the ports that will be permanently disabled Port Disable Bus-Powered A 1 00 00 Selects the ports that will be permanently disabled Max Power Self-Powered B 1 01 01 Max Current for this configuration (expressed in 2mA units). Max Power Bus-Powered C 1 64 64 Max Current for this configuration (expressed in 2mA units). Hub Controller Max Current Self-Powered D 1 01 01 Max Current (expressed in 2mA units). Hub Controller Max Current Bus-Powered E 1 64 64 Max Current (expressed in 2mA units). Power-On Time F 1 32 32 Time until power is stable. BYTE MSB: LSB SIZE (BYTES) Config Data Byte 1 6 Config Data Byte 2 FIELD 5.2.3.1 DESCRIPTION EEPROM Offset 1:0(h) - Vendor ID BIT NUMBER BIT NAME 15:8 VID_MSB Most Significant Byte of the Vendor ID. 7:0 VID_LSB Least Significant Byte of the Vendor ID. 5.2.3.2 DESCRIPTION EEPROM Offset 3:2(h) - Product ID BIT NUMBER BIT NAME 15:8 PID_MSB Most Significant Byte of the Product ID. 7:0 PID_LSB Least Significant Byte of the Product ID. Revision 2.3 (08-27-07) DESCRIPTION 20 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 5.2.3.3 EEPROM Offset 5:4(h) - Device ID BIT NUMBER BIT NAME 15:8 DID_MSB Most Significant Byte of the Device ID. 7:0 DID_LSB Least Significant Byte of the Device ID. 5.2.3.4 DESCRIPTION EEPROM Offset 6(h) - CONFIG_BYTE_1 BIT NUMBER BIT NAME 7 SELF_BUS_PWR DESCRIPTION Self or Bus Power: Selects between Self- and Bus-Powered operation. 0 = Bus-Powered operation. (BUS Default) 1 = Self-Powered operation. (SELF Default) Note: If Dynamic Power Switching is enabled, this bit is ignored and the SELF_PWR pin is used to determine if the hub is operating from self or bus power. 6 Reserved 5 HS_DISABLE Reserved High Speed Disable: Disables the capability to attach as either a High/Fullspeed device, and forces attachment as Full-speed only i.e. (no High-Speed support). 0 = High-/Full-Speed. (Default) 1 = Full-Speed-Only (High-Speed disabled!) 4 Reserved 3 EOP_DISABLE Reserved EOP Disable: Disables EOP generation at EOF1 when no downstream directed traffic is in progress. 0 = EOP generation at EOF1 is enabled. 1 = EOP generation at EOF1 is disabled, (normal operation). (Default) 2:1 CURRENT_SNS Over Current Sense: Indicates whether current sensing is ganged. 00 = Ganged sensing (all ports together). (Default for self-power) 01 = Reserved 1x = Over current sensing not supported. (may be used with Bus-Powered configurations only!, and is the default for bus-power) 0 5.2.3.5 Reserved Reserved EEPROM Offset 7(h) - CONFIG_BYTE_2 BIT NUMBER BIT NAME DESCRIPTION 7 DYNAMIC Dynamic Power Enable: Controls the ability for the Hub to transition to BusPowered operation if the local power source is removed (can revert back to Self-Power if local power source is restored). 0 = No Dynamic auto-switching. 1 = Dynamic Auto-switching capable.(Default) 6 SMSC USB2502 Reserved Reserved 21 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet BIT NUMBER BIT NAME DESCRIPTION 5:4 OC_TIMER OverCurrent Timer: Over Current Timer delay. 00 = 0.1ms 01 = 2ms (Default) 10 = 4ms 11 = 6ms 3 COMPOUND Compound Device: Designates if Hub is part of a compound device. 0 = No. (Default) 1 = Yes, Hub is part of a compound device. 2:0 5.2.3.6 Reserved Reserved. EEPROM Offset 8(h) - Non-Removable Device BIT NUMBER BIT NAME DESCRIPTION 7:0 NR_DEVICE Non-Removable Device: Indicates which port(s) include non-removable devices. `0' = port is removable, `1' = port is non-removable. Bit 7:3= 0; Reserved Bit 2= 1; Port 2 non-removable. Bit 1= 1; Port 1 non removable. Bit 0 is Reserved, always = `0'. 5.2.3.7 EEPROM Offset 9(h) - Port Disable For Self Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 PORT_DIS_SP Port Disable Self-Powered: Disables 1 or more contiguous ports. `0' = port is available, `1' = port is disabled. Bit 7:3= 0; Reserved Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = `0' 5.2.3.8 EEPROM Offset A(h) - Port Disable For Bus Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 PORT_DIS_BP Port Disable Bus-Powered: Disables 1 or more contiguous ports. `0' = port is available, `1' = port is disabled. Bit 7:3= 0; Reserved Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = `0' Revision 2.3 (08-27-07) 22 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 5.2.3.9 EEPROM Offset B(h) - Max Power For Self Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 MAX_PWR_SP Max Power Self_Powered: Value in 2mA 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, and the embedded peripheral reports 0mA in its descriptors. Note: The USB 2.0 Specification does not permit this value to exceed 100mA A value of 50 (decimal) indicates 100mA. 5.2.3.10 EEPROM Offset C(h) - Max Power For Bus Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 MAX_PWR_BP Max Power Bus_Powered: Value in 2mA 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, and the embedded peripheral reports 0mA in its descriptors. A value of 50 (decimal) indicates 100mA. 5.2.3.11 EEPROM Offset D(h) - 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: Value in 2mA 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. Note: The USB 2.0 Specification does not permit this value to exceed 100mA A value of 50 (decimal) indicates 100mA, which is the default value. SMSC USB2502 23 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet 5.2.3.12 EEPROM Offset E(h) - 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: Value in 2mA 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. A value of 50 (decimal) indicates 100mA, which is the default value. 5.2.3.13 EEPROM Offset F(h) - Power-On Time BIT NUMBER BIT NAME DESCRIPTION 7:0 POWER_ON_TIME Power On Time: The length of time that is takes (in 2 ms intervals) from the time the host initiated power-on sequence begins on a port until power is good on that port. 5.3 SMBus Slave Interface Instead of loading User-Defined Descriptor data from an external EEPROM, the SMSC Hub can be configured to receive a code load from an external processor via an SMBus interface. The SMBus interface shares the same pins as the EEPROM interface, if CFG_SEL1 & CFG_SEL0 activates the SMBus interface, external EEPROM support is no longer available (and the user-defined descriptor data must be downloaded via the SMBus). Due to system issues, 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 implementation is a subset of the SMBus interface to the host. The device is a slave-only SMBus device. The implementation in the device is a subset of SMBus since it only supports two protocols. The Write Byte and Read Byte protocols are the only valid SMBus protocols for the Hub. The Hub responds to other protocols as described in Section 5.3.2, "Invalid Protocol Response Behavior," on page 25. Reference the System Management Bus Specification, Rev 1.0. The SMBus interface is used to read and write the registers in the device. The register set is shown in Section 5.3.9, "Internal SMBus Memory Register Set," on page 26. 5.3.1 Bus Protocols Typical Write Byte and Read Byte protocols are shown below. Register accesses are performed using 7-bit slave addressing, an 8-bit register address field, and an 8-bit data field. The shading indicates the Hub driving data on the SMBDATA line; otherwise, host data is on the SDA/SMBDATA line. The slave address is the unique SMBus Interface Address for the Hub that identifies it on 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 (msb first). Revision 2.3 (08-27-07) 24 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 5.3.1.1 Byte Protocols When using the Hub SMBus Interface for byte transfers, a write will always consist of the SMBus Interface Slave Address byte, followed by the Internal Address Register byte, then the data byte. The normal read protocol consists of a write to the HUB with the SMBus Interface Address byte, followed by the Internal Address Register byte. Then restart the Serial Communication with a Read consisting of the SMBus Interface Address byte, followed by the data byte read from the Hub. This can be accomplished by using the Read Byte protocol. Note: For the following SMBus tables: Denotes Master-to-Slave Denotes Slave-to-Master Write Byte The Write Byte protocol is used to write data to the registers. The data will only be written if the protocol shown in Table 5.2 is performed correctly. Only one byte is transferred at a time for a Write Byte protocol. Table 5.2 SMBus Write Byte Protocol Field: Start Bits: Slave Addr 1 7 Wr Ack 1 1 Reg. Addr Ack 8 Reg. Data 1 8 Ack Stop 1 1 Read Byte The Read Byte protocol is used to read data from the registers. The data will only be read if the protocol shown in Table 5.3 is performed correctly. Only one byte is transferred at a time for a Read Byte protocol. Table 5.3 SMBus Read Byte Protocol Field: Start Slave Addr Wr Ack Bits: 1 7 1 1 5.3.2 Reg. Addr 8 Ack Start Slave Addr Rd Ack Reg. Data Nack Stop 1 1 7 1 1 8 1 1 Invalid Protocol Response Behavior Registers that are accessed with an invalid protocol are not updated. A register is only updated following a valid protocol. The only valid protocols are Write Byte and Read Byte, which are described above. The Hub only responds to the hardware selected Slave Address. Attempting to communicate with the Hub over SMBus with an invalid slave address or invalid protocol results in no response, and the SMBus Slave Interface returns to the idle state. The only valid registers that are accessible by the SMBus slave address are the registers defined in the Registers Section. See Section 5.3.3 for the response to undefined registers. 5.3.3 General Call Address Response The Hub does not respond to a general call address of 0000_000b. SMSC USB2502 25 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet 5.3.4 Slave Device Time-Out According to the SMBus Specification, V1.0 devices in a transfer can abort the transfer in progress and release the bus when any single clock low interval exceeds 25ms (TTIMEOUT, MIN). Devices that have detected this condition must reset their communication and be able to receive a new START condition no later than 35ms (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. 5.3.5 Stretching the SCLK Signal The Hub supports stretching of the SCLK by other devices on the SMBus. The Hub does not stretch the SCLK. 5.3.6 SMBus Timing The SMBus Slave Interface complies with the SMBus AC Timing Specification. See the SMBus timing in the "Timing Diagram" section. 5.3.7 Bus Reset Sequence The SMBus Slave Interface resets and returns to the idle state upon a START field followed immediately by a STOP field. 5.3.8 SMBus Alert Response Address The SMBALERT# signal is not supported by the Hub. 5.3.9 Internal SMBus Memory Register Set The following table provides the SMBus slave interface register map values. Table 5.4 SMBus Slave Interface Register Map REG ADDR R/W ABBR BIT 7 (MSB) BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 (LSB) 00h R/W Status/Command STCD 7 6 5 4 3 2 1 0 01h R/W VID LSB VIDL 7 6 5 4 3 2 1 0 02h R/W VID MSB VIDM 7 6 5 4 3 2 1 0 03h R/W PID LSB PIDL 7 6 5 4 3 2 1 0 04h R/W PID MSB PIDM 7 6 5 4 3 2 1 0 05h R/W DID LSB DIDL 7 6 5 4 3 2 1 0 06h R/W DID MSB DIDM 7 6 5 4 3 2 1 0 07h R/W Config Data Byte 1 CFG1 7 6 5 4 3 2 1 0 08h R/W Config Data Byte 2 CFG2 7 6 5 4 3 2 1 0 09h R/W Non-Removable Devices NRD 7 6 5 4 3 2 1 0 0Ah R/W Port Disable (Self) PDS 7 6 5 4 3 2 1 0 0Bh R/W Port Disable (Bus) PDB 7 6 5 4 3 2 1 0 REGISTER NAME Revision 2.3 (08-27-07) 26 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Table 5.4 SMBus Slave Interface Register Map (continued) REG ADDR R/W REGISTER NAME ABBR BIT 7 (MSB) BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 (LSB) 0Ch R/W Max Power (Self) MAXPS 7 6 5 4 3 2 1 0 0Dh R/W Max Power (Bus) MAXPB 7 6 5 4 3 2 1 0 0Eh R/W Hub Controller Max Current (Self) HCMCS 7 6 5 4 3 2 1 0 0Fh R/W Hub Controller Max Current (bus) HCMCB 7 6 5 4 3 2 1 0 10h R/W Power-on Time PWRT 7 6 5 4 3 2 1 0 5.3.9.1 Register 00h: Status/Command (Reset = 0x00) BIT NUMBER BIT NAME 7:3 Reserved 2 RESET DESCRIPTION Reserved. {Note: Software must never write a `1' to these bits} Reset the SMBus Interface and internal memory back to RESET_N assertion default settings. {Note: During this reset, this bit is automatically cleared to its default value of 0.} 0 = Normal Run/Idle State. 1 = Force a reset. 1 WRITE_PROT Write Protect: The external SMBus host sets this bit after the Hub's internal memory is loaded with configuration data. {Note: The External SMBus Host is responsible for verification of downloaded data.} 0 = The internal memory (address range 01-10h) is not write protected. 1 = The internal memory (address range 01-10h) is "write-protected" to prevent unintentional data corruption.} {Note: This bit is write once and is only cleared by assertion of the external RESET_N pin.} 0 USB_ATTACH USB Attach & power-down the SMBus Interface. 0 = Default; SMBus slave interface is active. 1 = Hub will signal a USB attach event to an upstream device, Note: SMBus Slave interface will completely power down after the ACK has completed. {Note: This bit is write once and is only cleared by assertion of the external RESET_N pin.} 5.3.9.2 Register 01h: Vendor ID (LSB) (Reset = 0x00) BIT NUMBER BIT NAME 7:0 VID_LSB SMSC USB2502 DESCRIPTION Least Significant Byte of the Vendor ID. 27 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet 5.3.9.3 Register 02h: Vendor ID (MSB) (Reset = 0x00) BIT NUMBER BIT NAME 7:0 VID_MSB 5.3.9.4 BIT NAME 7:0 PID_LSB BIT NAME 7:0 PID_MSB BIT NAME 7:0 DID_LSB DESCRIPTION Most Significant Byte of the Product ID. DESCRIPTION Least Significant Byte of the Device ID. Register 06h: Device ID (MSB) (Reset = 0x00) BIT NUMBER BIT NAME 7:0 DID_MSB 5.3.9.8 Least Significant Byte of the Product ID. Register 05h: Device ID (LSB) (Reset = 0x00) BIT NUMBER 5.3.9.7 DESCRIPTION Register 04h: Product ID (MSB) (Reset = 0x00) BIT NUMBER 5.3.9.6 Most Significant Byte of the Vendor ID. Register 03h: Product ID (LSB) (Reset = 0x00) BIT NUMBER 5.3.9.5 DESCRIPTION DESCRIPTION Most Significant Byte of the Device ID. Register 07h: CONFIG_BYTE_1 (Reset = 0x00) BIT NUMBER BIT NAME 7 SELF_BUS_PWR DESCRIPTION Self or Bus Power: Selects between Self- and Bus-Powered operation. 0 = Bus-Powered operation. 1 = Self-Powered operation. Note: If Dynamic Power Switching is enabled, this bit is ignored and the SELF_PWR pin is used to determine if the hub is operating from self or bus power. 6 Reserved Revision 2.3 (08-27-07) Reserved 28 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet BIT NUMBER BIT NAME DESCRIPTION 5 HS_DISABLE High Speed Disable: Disables the capability to attach as either a High/Fullspeed device, and forces attachment as Full-speed only i.e. (no High-Speed support). 0 = High-/Full-Speed. 1 = Full-Speed-Only (High-Speed disabled!) 4 Reserved 3 EOP_DISABLE Reserved EOP Disable: Disables EOP generation of EOF1 when in Full-Speed mode. 0 = EOP generation is normal. 1 = EOP generation is disabled. 2:1 CURRENT_SNS Over Current Sense: Indicates whether current sensing isganged. 00 = Ganged sensing (all ports together). 01 = Reserved1x = Over current sensing not supported. (must only be used with Bus-Powered configurations!) 0 5.3.9.9 Reserved Reserved Register 08h: Configuration Data Byte 2 (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7 DYNAMIC Dynamic Power Enable: Controls the ability for the Hub to transition to BusPowered operation if the local power source is removed (can revert back to Self-Power if local power source is restored). 0 = No Dynamic auto-switching. 1 = Dynamic Auto-switching capable. 6 Reserved 5:4 OC_TIMER Reserved OverCurrent Timer: Over Current Timer delay. 00 = 0.1ms 01 = 2ms 10 = 4ms 11 = 6ms 3 COMPOUND Compound Device: Designates if Hub is part of a compound device. 0 = No. 1 = Yes, Hub is part of a compound device. 2:0 SMSC USB2502 Reserved Reserved 29 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet 5.3.9.10 Register 09h: Non-Removable Device (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7:0 NR_DEVICE Non-Removable Device: Indicates which port(s) include non-removable devices. `0' = port is removable, `1' = port is non-removable. Bit 7:3: Reserved, always = `0' Bit 2= 1; Port 2 non-removable. Bit 1= 1; Port 1 non removable. Bit 0 is Reserved, always = `0'. 5.3.9.11 Register 0Ah: Port Disable For Self Powered Operation (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7:0 PORT_DIS_SP Port Disable Self-Powered: Disables 1 or more contiguous ports. `0' = port is available, `1' = port is disabled. Bit 7:3= 0; ReservedBit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = `0' 5.3.9.12 Register 0Bh: Port Disable For Bus Powered Operation (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7:0 PORT_DIS_BP Port Disable Bus-Powered: Disables 1 or more contiguous ports. `0' = port is available, `1' = port is disabled. Bit 7:3= 0; ReservedBit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = `0' 5.3.9.13 Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7:0 MAX_PWR_SP Max Power Self_Powered: Value in 2mA 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, and the embedded peripheral reports 0mA in its descriptors. Note: The USB 2.0 Specification does not permit this value to exceed 100mA A value of 50 (decimal) indicates 100mA. Revision 2.3 (08-27-07) 30 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 5.3.9.14 Register 0Dh: Max Power For Bus Powered Operation (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7:0 MAX_PWR_BP Max Power Bus_Powered: Value in 2mA 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, and the embedded peripheral reports 0mA in its descriptors. A value of 50 (decimal) indicates 100mA. 5.3.9.15 Register 0Eh: Hub Controller Max Current For Self Powered Operation (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7:0 HC_MAX_C_SP Hub Controller Max Current Self-Powered: Value in 2mA 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. Note: The USB 2.0 Specification does not permit this value to exceed 100mA A value of 50 (decimal) indicates 100mA, which is the default value. 5.3.9.16 Register 0Fh: Hub Controller Max Current For Bus Powered Operation (Reset = 0x00) BIT NUMBER BIT NAME DESCRIPTION 7:0 HC_MAX_C_BP Hub Controller Max Current Bus-Powered: Value in 2mA 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 100mA, which is the default value. 5.3.9.17 Register 10h: Power-On Time (Reset = 0x00) 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 power-on sequence begins on a port until power is good on that port. 5.3.9.18 Undefined Registers The registers shown in Table 5.4 are the defined registers in the Hub. Reads to undefined registers return 00h. Writes to undefined registers have no effect and do not return an error. SMSC USB2502 31 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet 5.3.9.19 Reserved Registers Unless otherwise instructed, only a `0' may be written to all reserved registers or bits. 5.4 Default Configuration Option: The SMSC Hub can be configured via its internal default configuration. (please see for specific details on how to enable default configuration. Please refer to Table 5.1 on page 19 for the internal default values that are loaded when this option is selected. 5.5 Default Strapping Options: The SMSC Hub can be configured via a combination of internal default values and pin strap options. Please see Table 4.1, "7-Port Hub Pin Descriptions" for specific details on how to enable the default/pin-strap configuration option. The strapping option pins only cover a limited sub-set of the configuration options. The internal default values will be used for the bits & registers that are not controlled by a strapping option pin. Please refer to Table 5.1 on page 19 for the internal default values that are loaded when this option is selected. The Green LED pins are sampled after RESET_N negation, and the logic values are used to configure the hub if the internal default configuration mode is selected. The implementation shown below (see Figure 5.1) shows a recommended passive scheme. When a pin is configured with a "Strap High" configuration, the LED functions with active low signalling, and the PAD will "sink" the current from the external supply. When a pin is configured with a "Strap Low" configuration, the LED functions with active high signalling, and the PAD will "source" the current to the external LED. +V Strap High 50K GR1 HUB GR2 Strap Low 50K Figure 5.1 LED Strapping Option 5.6 Reset There are two different resets that the Hub experiences. One is a hardware reset (via the RESET_N pin) and the second is a USB Bus Reset. Revision 2.3 (08-27-07) 32 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 5.6.1 External Hardware RESET_N A valid hardware reset is defined as, assertion of RESET_N for a minimum of 1us after all power supplies are within operating range. While reset is asserted, the Hub (and its associated external circuitry) consumes less than 500A of current from the upstream USB power source (300A for the Hub and 200A for the external circuitry). Assertion of RESET_N (external pin) causes the following: 1. All downstream ports are disabled, and PRTPWR power to downstream devices is removed. 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, 00(h)). 5. The external crystal oscillator is halted. 6. The PLL is halted. 7. LED indicators are disabled. The Hub is "operational" 500s after RESET_N is negated. Once operational, the Hub immediately reads OEM-specific data from the external EEPROM (if the SMBus option is not disabled). 5.6.1.1 RESET_N for Strapping Option Configuration Hardware reset asserted Drive Strap Outputs to inactive levels Read Strap Options t1 Attach USB Upstream USB Reset recovery t5 Start completion request response Idle t7 t6 t8 t2 t3 RESET_N VSS t4 Strap Pins Don't Care Valid Driven by Hub if strap is an output. Don't Care VSS Figure 5.2 Reset_N Timing for Default/Strap Option Mode Table 5.5 Reset_N Timing for Default/Strap Option Mode NAME DESCRIPTION MIN TYP MAX UNITS 1 sec Strap Setup Time 16.7 nsec t3 Strap Hold Time. 16.7 t4 hub outputs driven to inactive logic states t5 USB Attach (See Note). t1 RESET_N Asserted. t2 SMSC USB2502 2.0 33 DATASHEET 1400 nsec 1.5 sec 100 msec Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Table 5.5 Reset_N Timing for Default/Strap Option Mode (continued) NAME DESCRIPTION MIN t6 Host acknowledges attach and signals USB Reset. t7 USB Idle. t8 Completion time for requests (with or without data stage). TYP MAX UNITS 100 msec undefined msec 5 msec Notes: 5.6.1.2 When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t1+t5. All Power Supplies must have reached the operating levels mandated in Section Chapter 7, "DC Parameters", prior to (or coincident with) the assertion of RESET_N. RESET_N for EEPROM Configuration Hardware reset asserted Attach USB Upstream Read EEPROM + Set Options Read Strap Options USB Reset recovery Start completion request response Idle t4 t1 t2 t5 t3 t6 t7 RESET_N VSS Figure 5.3 Reset_N Timing for EEPROM Mode Table 5.6 Reset_N Timing for EEPROM Mode NAME DESCRIPTION MIN t1 RESET_N Asserted. t2 Hub Recovery/Stabilization. t3 EEPROM Read / Hub Config. t4 USB Attach (See Note). t5 Host acknowledges attach and signals USB Reset. t6 USB Idle. t7 Completion time for requests (with or without data stage). TYP MAX UNITS sec 1 2.0 500 sec 99.5 msec 100 msec 100 msec undefined msec 5 msec Notes: When in Bus-Powered mode, the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t4+t5+t6+t7. Revision 2.3 (08-27-07) 34 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet All Power Supplies must have reached the operating levels mandated in Section Chapter 7, "DC Parameters", prior to (or coincident with) the assertion of RESET_N. RESET_N for SMBus Slave Configuration 5.6.1.3 Hardware reset asserted Reset Negation t1 SMBus Code Load t2 Hub PHY Stabilization Attach USB Upstream t3 t4 USB Reset recovery Start completion request response Idle t6 t5 t7 RESET_N VSS Figure 5.4 Reset_N Timing for SMBus Mode Table 5.7 Reset_N Timing for SMBus Mode NAME DESCRIPTION MIN t1 RESET_N Asserted. t2 Hub Recovery/Stabilization. t3 SMBus Code Load (See Note). t4 Hub Configuration and USB Attach. t5 Host acknowledges attach and signals USB Reset. t6 USB Idle. t7 Completion time for requests (with or without data stage). TYP MAX UNITS sec 1 10 500 sec 99.5 msec 100 msec 100 msec Undefined msec 5 msec Notes: For Bus-Powered configurations, the 99.5ms (MAX) is required, and the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t2+t3+t4+t5+t6+t7. For Self-Powered configurations, t3 MAX is not applicable and the time to load the configuration is determined by the external SMBus host. All Power Supplies must have reached the operating levels mandated in Section Chapter 7, "DC Parameters", prior to (or coincident with) the assertion of RESET_N. SMSC USB2502 35 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet 5.6.2 USB Bus Reset In response to the upstream port signaling a reset to the Hub, the Hub does the following: Note: The Hub does not propagate the upstream USB reset to downstream devices. 1. Sets default address to 0. 2. Sets configuration to: Unconfigured. 3. Negates PRTPWR to all downstream ports. 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 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. Revision 2.3 (08-27-07) 36 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Chapter 6 XNOR Test XNOR continuity tests all signal pins on the Hub (every pin except for NC, XTAL1/CLKIN, XTAL2, ATEST/REG_EN, RBIAS, TEST, Power, and Ground). This functionality is enabled by driving TEST and CFG_SEL[1] high, driving SCLK low and transition RESET_N from low to high. The output from the XNOR chain is driven to GR2 . For each pin tested for continuity GR2 should toggle. SMSC USB2502 37 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Chapter 7 DC Parameters 7.1 Maximum Guaranteed Ratings PARAMETER SYMBOL MIN MAX UNITS Storage Temperature TA -55 150 C 325 C Lead Temperature 1.8V supply voltage VDDA18PLL VDD18 -0.3 2.5 V 3.3V supply voltage VDDA33 VDDA33PLL -0.3 4.0 V Voltage on any I/O pin -0.3 (3.3V supply voltage + 2) 6 V Voltage on XTAL1 -0.3 4.0 V Voltage on XTAL2 -0.3 VDD18 + 0.3V V COMMENTS Soldering < 10 seconds VDD33CR Note: Stresses above the specified parameters could cause permanent damage to the device. This is a stress rating only and functional operation of the device at any condition above those indicated in the operation sections of this specification is 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. Revision 2.3 (08-27-07) 38 DATASHEET SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet 7.2 Recommended Operating Conditions PARAMETER SYMBOL MIN MAX UNITS Operating Temperature TA 0 70 C 1.8V supply voltage VDDA18PLL VDD18 1.62 1.98 V 3.3V supply voltage VDDA33 VDDA33PLL 3.0 3.6 V -0.3 5.5 V COMMENTS VDD33CR Voltage on any I/O pin If any 3.3V supply voltage drops b e l o w 3 . 0 V, t h e n t h e M A X becomes: (3.3V supply voltage + 0.5) Voltage on XTAL1 -0.3 VDDA33 V Voltage on XTAL2 -0.3 VDD18 V Table 7.1 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 IIL -10 VHYSI 250 Input Leakage Hysteresis (`IS' Only) TTL Levels V 300 +10 uA 350 mV 0.8 V VIN = 0 to VDD33CR Input Buffer with Pull-Up (IPU) Low Input Level VILI High Input Level VIHI 2.0 IILL +5 +45 uA IIHL -10 +10 uA Low Input Leakage High Input Leakage TTL Levels V VIN = 0 VIN = VDD33CR Input Buffer with Pull-Down IPD Low Input Level VILI High Input Level VIHI 2.0 IILL +10 -10 uA IIHL -80 -160 uA Low Input Leakage High Input Leakage SMSC USB2502 0.8 V TTL Levels V VIN = 0 VIN = VDD33CR 39 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Table 7.1 DC Electrical Characteristics (continued) PARAMETER SYMBOL MIN TYP MAX UNITS 0.8 V COMMENTS ICLK Input Buffer Low Input Level VILCK High Input Level VIHCK 2.0 IIL -10 +10 uA VHYSC 50 100 mV 0.4 V Input Leakage Hysteresis TTL Levels V VIN = 0 to VDD33CR O8 and I/O8 Type Buffer Low Output Level High Output Level Output Leakage VOL VOH 2.4 IOL -10 V IOL = 8 mA @ VDD33CR = 3.3V IOH = -4mA @ VDD33CR = 3.3V +10 uA 0.4 V IOL = 12 mA @ VDD33CR = 3.3V +10 A 350 mV VIN = 0 to VDD33CR (Note 1) VIN = 0 to VDD33CR (Note 1) I/OSD12 Type Buffer Low Output Level VOL Output Leakage IOL -10 VHYSI 250 Hysteresis 300 IO-U (Note 2) I-R (Note 3) Supply Current Unconfigured High-Speed Host Full-Speed Host ICCINIT ICCINIT 73 65 mA mA Supply Current Configured (High-Speed Host) 2 Ports @ FS/LS 2 Ports @ HS 1 Port HS, 1 Port FS/LS Total from all supplies IHCC2 IHCH2 IHCH1C1 120 170 140 mA mA mA Total from all supplies Supply Current Configured (Full-Speed Host) 1 Port 2 Ports Revision 2.3 (08-27-07) IFCC1 IFCC2 90 90 40 DATASHEET mA mA SMSC USB2502 2-Port USB 2.0 Hub Controller Datasheet Table 7.1 DC Electrical Characteristics (continued) PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS Supply Current Suspend ICSBY 320 425 uA Total from all supplies. Supply Current Reset IRST 160 300 uA Total from all supplies. Notes: 1. Output leakage is measured with the current pins in high impedance. 2. See USB 2.0 Specification for USB DC electrical characteristics. 3. RBIAS is a 3.3V tolerant analog pin. CAPACITANCE TA = 25C; fc = 1MHz; VDD33CR = 3.3V LIMITS PARAMETER SYMBOL MIN TYP MAX UNIT TEST CONDITION All pins except USB pins (and pins under test tied to AC ground) Clock Input Capacitance CIN 12 pF Input Capacitance CIN 8 pF COUT 12 pF Output Capacitance Power Sequencing There are no power supply sequence restrictions for the Hub. The order in which power supplies power-up and power-down is implementation dependent. SMSC USB2502 41 DATASHEET Revision 2.3 (08-27-07) 2-Port USB 2.0 Hub Controller Datasheet Chapter 8 AC Specifications 8.1 Oscillator/Clock Crystal: Parallel Resonant, Fundamental Mode, 24 MHz 100ppm. External Clock: 50% Duty cycle 10%, 24 MHz 100ppm, Jitter < 100ps rms. 8.1.1 SMBus Interface: The SMSC Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the SMBus 1.0 Specification for Slave-Only devices (except as noted in Section 5.3). 8.1.2 I2C EEPROM: Frequency is fixed at 59KHz 20%. 8.1.3 USB 2.0 The Hub conforms to all voltage, power, and timing characteristics and specifications as set forth in the USB 2.0 Specification. Please refer to the USB Specification for more information. Revision 2.3 (08-27-07) 42 DATASHEET SMSC USB2502 REVISION HISTORY D DESCRIPTION DATE RELEASED BY - SEE SPEC FRONT PAGE FOR REVISION HISTORY - - D2 D1 3 REVISION TERMINAL #1 IDENTIFIER AREA (D/2 X E/2) e 3 TERMINAL #1 IDENTIFIER AREA (D1/2 X E1/2) E1 E E2 EXPOSED PAD 0.6(MAX) 36X L 0.6(MAX) CHAMFERED CORNERS ARE OPTIONAL 4X 4 36X 0.2 MIN TOP VIEW 36X b 2 BOTTOM VIEW 4X 0-12 43 DATASHEET C 4 A2 ccc C A A1 A3 SIDE VIEW D2 / E2 VARIATIONS CATALOG PART 3-D VIEWS UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN MILLIMETERS AND TOLERANCES ARE: SMSC USB2502 NOTES: 1. ALL DIMENSIONS ARE IN MILLIMETER. 2. POSITION TOLERANCE OF EACH TERMINAL IS 0.05mm AT MAXIMUM MATERIAL CONDITION. DIMENSIONS "b" APPLIES TO PLATED TERMINALS AND IT IS MEASURED BETWEEN 0.15 AND 0.30 mm FROM THE TERMINAL TIP. 3. DETAILS OF TERMINAL #1 IDENTIFIER ARE OPTIONAL BUT MUST BE LOCATED WITHIN THE AREA INDICATED. 4. COPLANARITY ZONE APPLIES TO EXPOSED PAD AND TERMINALS. DECIMAL 0.1 X.X X.XX 0.05 X.XXX 0.025 THIRD ANGLE PROJECTION 80 ARKAY DRIVE HAUPPAUGE, NY 11788 USA ANGULAR 1 TITLE NAME DATE S.K.ILIEV 12/6/04 DIM AND TOL PER ASME Y14.5M - 1994 MATERIAL FINISH - DRAWN S.K.ILIEV S.K.ILIEV Figure 9.1 36 Pin QFN Package REV DWG NUMBER CHECKED MO-36-QFN-6x6 12/6/04 APPROVED PRINT WITH "SCALE TO FIT" DO NOT SCALE DRAWING PACKAGE OUTLINE 36 TERMINAL QFN, 6x6mm BODY, 0.5mm PITCH SCALE 12/6/04 STD COMPLIANCE 1:1 JEDEC: MO-220 F SHEET 1 OF 1 2-Port USB 2.0 Hub Controller Datasheet Revision 2.3 (08-27-07) Chapter 9 Package Outlines 2-Port USB 2.0 Hub Controller Datasheet Figure 9.2 48 Pin TQFP Package Outline (7x7x1.4 mm body, 2mm Footprint) Table 9.1 48 Pin TQFP Package MIN NOMINAL MAX REMARKS A A1 A2 D D1 E E1 H L L1 ~ 0.05 1.35 8.80 6.90 8.80 6.90 0.09 0.45 ~ 1.60 0.15 1.45 9.20 7.10 9.20 7.10 0.20 0.75 ~ e ~ ~ ~ ~ ~ ~ ~ ~ 0.60 1.00 0.50 Basic Overall Package Height Standoff Body Thickness X Span X body Size Y Span Y body Size Lead Frame Thickness Lead Foot Length Lead Length Lead Pitch 0o ~ 7o Lead Foot Angle W R1 R2 ccc 0.17 0.08 0.08 ~ 0.22 ~ ~ ~ 0.27 ~ 0.20 0.08 Lead Width Lead Shoulder Radius Lead Foot Radius Coplanarity Notes: 1. Controlling Unit: millimeter. 2. Tolerance on the true position of the leads is 0.04 mm maximum. 3. Package body dimensions D1 and E1 do not include the mold protrusion. Maximum mold protrusion is 0.25 mm. 4. Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane. 5. Details of pin 1 identifier are optional but must be located within the zone indicated. Revision 2.3 (08-27-07) 44 DATASHEET SMSC USB2502