USB2504/ USB2504A Integrated USB 2.0 Compatible 4-Port Hub PRODUCT FEATURES Datasheet Integrated USB 2.0 Compatible 4-Port Hub -- 4 Transaction Translators for highest performance -- High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and Low-Speed (1.5Mbits/s) compatible -- Full power management with per port or ganged, selectable 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 -- 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 1.8 Volt Low Power Core Operation 3.3 Volt I/O with 5V Input Tolerance 64-Pin TQFP lead-free RoHS compliant package 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 USB2504/USB2504A DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet ORDER NUMBERS: USB2504/USB2504A-JT FOR 64 PIN TQFP LEAD-FREE ROHS COMPLIANT 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. 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Revision 2.3 (08-27-07) 2 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Table of Contents Chapter 1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 OEM Selectable Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Chapter 2 Pin Table 4-Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Chapter 3 Pin Configuration 4-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Chapter 4 4-Port Hub Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Chapter 5 Functional Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 5.1 5.2 5.3 5.4 5.5 5.6 4-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 19 19 19 20 20 25 25 26 26 27 27 27 27 27 27 33 33 34 34 37 Chapter 6 Backward Compatibility to the USB20H04. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 6.1 6.2 6.3 6.4 Internal 1.8V regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configuration by Internal Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Configuration by SMBus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PRTPWR_POL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 39 39 39 Chapter 7 XNOR Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Chapter 8 DC Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 8.1 8.2 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Recommended Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Chapter 9 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 9.1 Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1.1 SMBus Interface: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1.2 I2C EEPROM: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.1.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMSC USB2504/USB2504A 3 DATASHEET 45 45 45 45 Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 10 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Revision 2.3 (08-27-07) 4 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet List of Figures Figure 3.1 Figure 4.1 Figure 5.1 Figure 5.2 Figure 5.3 Figure 5.4 Figure 10.1 4-Port 64 Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4-Port Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 LED Strapping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 64 Pin TQFP Package Outline (10x10x1.4 mm body - 2 mm footprint) . . . . . . . . . . . . . . . . . 46 SMSC USB2504/USB2504A 5 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet List of Tables Table 2.1 4-Port Pin Table for 64-TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 4.1 4-Port Hub Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 4.2 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 4.3 Miscellaneous Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 4.4 Power, Ground, and No Connect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 4.5 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 5.1 User-Defined Descriptor Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Table 5.2 SMBus Write Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Table 5.3 SMBus Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Table 5.4 SMBus Slave Interface Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Table 5.5 Reset_N Timing for Default/Strap Option Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Table 5.6 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 5.7 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Table 8.1 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Table 10.1 64 Pin TQFP Package Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 Revision 2.3 (08-27-07) 6 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 1 General Description The SMSC 4-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 4-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. A dedicated Transaction Translator (TT) is available for each downstream facing port. This architecture ensures maximum USB throughput for each connected device when operating with mixed-speed peripherals. 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 USB2504/USB2504A following a reset. This configuration may be sufficient for some applications. Strapping option pins make it possible to modify a limited subset of the configuration options. The USB2504/USB2504A 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 pinstrapped 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 4-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). Multiple Transaction Translator (Multi-TT) or Single-TT support. Optional OEM configuration via I2C EEPROM or via the industry standard SMBus interface from an external SMBus Host. Port power switching on an individual or ganged basis. Port over-current monitoring on an individual or ganged basis. LED indicator support. 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) Port Disable LED support MTT enable Ganged Vs Port power switching and over-current sensing SMSC USB2504/USB2504A 7 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 2 Pin Table 4-Port Table 2.1 4-Port Pin Table for 64-TQFP UPSTREAM USB 2.0 INTERFACE (3 PINS) USBDP0 USBDN0 VBUS_DET 4-PORT USB 2.0 INTERFACE (26 PINS) USBDP1 USBDN1 USBDP2 USBDN2 USBDP3 USBDN3 USBDP4 USBDN4 GR1/ NON_REM0 GR2/ NON_REM1 GR3/ PRT_DIS0 GR4/ PRT_DIS1 AM1/ GANG_EN AM2/ MTT_EN AM3 AM4/ LED_EN PRTPWR1 PRTPWR2 PRTPWR3 PRTPWR4 OCS1_N OCS2_N OCS3_N OCS4_N PRTPWR_POL RBIAS SERIAL PORT INTERFACE (5 PINS) SDA/SMBDATA SCL/SMBCLK/ CFG_SEL2 CFG_SEL1 CFG_SEL0 MISC (8 PINS) XTAL1/CLKIN XTAL2 RESET_N SELF_PWR ATEST/ REG_EN CLKIN_EN TEST1 TEST0 POWER, GROUND (17 PINS) AND (5) NO CONNECT Revision 2.3 (08-27-07) 8 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet RESET_N NC 33 SDA/SMBDATA SCL/SMBCLK CFG_SEL0 PRTPWR4 OCS4_N PRTPWR3 OCS3_N VSS VDD18 PRTPWR2 OCS2_N PRTPWR1 OCS1_N CLKIN_EN 48 TEST1 Chapter 3 Pin Configuration 4-Port Hub 49 32 NC CFG_SEL1 TEST0 SELF_PWR VDD18 VBUS_DET VSS VSS VDD33 VDD18 GR1/NON_REM0 VSS AM1/GANG_EN USB2504 & USB2504A NC XTAL2 GR2/NON_REM1 AM2/MTT_EN XTAL1/CLKIN PRTPWR_POL CFG_SEL2 GR3/PRT_DIS0 VDDA18PLL AM3 VDDA33PLL GR4/PRT_DIS1 ATEST/REG_EN AM4/LED_EN RBIAS NC 17 VSS USBDP4 USBDN4 VDDA33 USBDP3 USBDN3 VSS USBDP2 USBDN2 VDDA33 USBDP1 USBDN1 VSS USBDP0 USBDN0 VDDA33 NC 16 64 1 VSS Figure 3.1 4-Port 64 Pin TQFP SMSC USB2504/USB2504A 9 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 4 4-Port Hub Block Diagram Upstream Upstream 24 MHz USB Data VBUS Crystal Upstream PHY VBUS Power Detect 3.3V To EEPROM Pin 1.8V Strapping or SMBus Master Cap Options SD SCL Internal Defaults Select 1.8V Reg. PLL Controller SIE Repeater TT #1 TT #2 Serial Interface TT #3 TT #4 Port Controller Routing Logic Port #1 Downstream OC Sense PHY #1 Switch Driver LED Drivers ... Downstream OC Switch/LED USB Data Sense Drivers Port #4 Downstream OC Sense PHY #4 Switch Driver LED Drivers Downstream OC Switch/LED USB Data Sense Drivers Figure 4.1 4-Port Block Diagram Table 4.1 4-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/O12 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). Revision 2.3 (08-27-07) 10 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Table 4.1 4-Port Hub Pin Descriptions (continued) NAME SYMBOL TYPE FUNCTION 4-PORT USB 2.0 HUB INTERFACE High-Speed USB Data USBDN[4:1] USBDP[4:1] IO-U These pins connect to the downstream USB peripheral devices attached to the Hub's ports. USB Power Enable PRTPWR[4:1] O12 Enables power to USB peripheral devices (downstream). Port 4:3 Green LED & Port Disable strapping option. GR[4:3]/ PRT_DIS[1:0] The active signal level of the PRTPWR[4:1] pins is determined by the Power Polarity Strapping function of the PRTPWR_POL pin. I/O12 Green indicator LED for ports 4 and 3. 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 RESET_N negation to determine if ports [4:2] will be permanently disabled. Also, the active state of the LED's will be determined as follows: PRT_DIS[1:0] = `00', All ports are enabled, GR4 is active high, GR3 is active high. PRT_DIS[1:0] = `01', Port 4 is disabled, GR4 is active high, GR3 is active low. PRT_DIS[1:0] = `10', Ports 4 & 3 are disabled, GR4 is active low, GR3 is active high. PRT_DIS[1:0] = `11', Ports 4, 3 & 2 are disabled, GR4 is active low, GR3 is active low. Port [2:1] Green LED & Port NonRemovable strapping option. GR[2:1]/ NON_REM[1:0] I/O12 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 RESET_N negation to determine if ports [3:1] contain permanently attached (nonremovable) 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_REM[1:0] = `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, & 3 are non-removable, GR2 is active low, GR1 is active low. SMSC USB2504/USB2504A 11 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Table 4.1 4-Port Hub Pin Descriptions (continued) NAME SYMBOL TYPE FUNCTION Port 4 Amber LED & LED Enable strapping option AM4/ LED_EN I/O12 Amber indicator LED for port 4. Will be active low when LED support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration, this pin will be sampled at RESET_N negation to determine if LED support is enabled or disabled. Also, the active state of the LED will be determined as follows: `0' = LED support is disabled, LED is inactive `1' = LED Support is enabled, LED is active low. Port 3 Amber LED AM3 I/O12 Amber indicator LED for port 3. Signal will be active low. Port 2 Amber LED & MTT Disable AM2/ MTT_EN I/O12 Amber indicator LED for port 2. Will be active low when LED support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration, this pin will be sampled at RESET_N negation to determine if MTT support is disabled (STT only). Also, the active state of the LED will be determined as follows: `0' = MTT support is disabled, LED is active high `1' = MTT support is enabled, LED is active low. Port 1 Amber LED & Gang Power Switching and Current Sensing strapping option. AM1/ GANG_EN I/O12 Amber indicator LED for port 1, Will be active low when LED support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration, this pin will be sampled at RESET_N negation to determine if downstream port power switching and current sensing are ganged, or individual port-by-port. Also, the active state of the LED will be determined as follows: `0' = Port-by-port sensing & switching, LED is active high `1' = Ganged sensing & switching, LED is active low. Port Power Polarity strapping. PRTPWR_POL I/O12 Port Power Polarity strapping determination for the active signal polarity of the [4:1]PRTPWR pins. 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 [4:1]PRTPWR pins 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[4:1] pins. `1' = PRTPWR[4:1]_P/N pins have an active `high' polarity `0' = PRTPWR[4:1]_P/N pins have an active `low' polarity Over Current Sense OCS[4:1]_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 USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Table 4.1 4-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 SCL/SMBCLK IOSD12 (Serial Clock)/(SMB Clock) signal. Configuration Programming Select CFG_SEL0 IOSD12 This multifunction pin is read on the rising edge of RESET_N negation 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. Configuration Programming Select CFG_SEL2 I This pin is read on the rising edge of RESET_N negation and will determine the hub configuration method as described in Table 4.2. Table 4.2 SMBus or EEPROM Interface Behavior CFG_SEL2 CFG_SEL1 CFG_SEL0 SMBus or EEPROM interface behavior. X 0 0 Configured as an SMBus slave for external download of userdefined descriptors. SMBus slave address is 0101100 X 0 1 Configured as an SMBus slave for external download of userdefined descriptors. SMBus slave address is 0101101 0 1 0 Internal Default Configuration 1 1 0 Internal Default Configuration via strapping options. X 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. SMSC USB2504/USB2504A 13 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Table 4.3 Miscellaneous Pins (continued) NAME SYMBOL TYPE FUNCTION 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 Pins TEST[1:0] IPD Used for testing the chip. User must treat as a noconnect or connect to ground. 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 VDD1P8 VDD18 TYPE FUNCTION +1.8V core power. If the internal regulator is enabled, then VDD18 pin 54 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 VDDIO3P3 VDD33 VDDA3P3 VDDA33 VSS VSS Revision 2.3 (08-27-07) +3.3V I/O power. +3.3V Filtered analog power. Ground. 14 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet 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. O12 Output 12mA. I/O12 Input/Output, 12mA 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 USB2504/USB2504A 15 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 5 Functional Block Description 5.1 4-Port Hub SMSC's USB 2.0 4-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 4-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 (some are mutually exclusive), 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 (with or without pin strapping option over-rides). In all cases, the configuration method will be determined by the CFG_SEL2, 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 USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet 5.1.1.5 Port Indicators Controls the use of LED indicator for Port status information. See Section 11.5.3 of the USB 2.0 Specification for additional details. This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the LED_EN pin enables/disables LED Indicator support. 5.1.1.6 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. 5.1.1.7 Multiple-TT Support Selects between a mode where only one transaction translator is available for all ports (Single-TT), or each port gets a dedicated transaction translator (Multi-TT) {Note: The host may force Single-TT mode only}. This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the MTT_EN pin enables/disables MTT support. 5.1.1.8 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. 5.1.1.9 Current Sensing Selects current sensing on a port-by-port basis, all ports ganged, or none(only for bus-powered hubs)The ability to support current sensing on a port or ganged basis is hardware implementation dependent. 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) 5.1.1.10 Downstream Port Power Enabling Enables all ports simultaneously (ganged), or port power is individually switched on and off on a portby-port basis. The ability to support power enabling on a port or ganged basis is hardware implementation dependent. This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the GANG_EN pin will configure the hub for ganged or individual port-by-port port power switching. 5.1.1.11 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. SMSC USB2504/USB2504A 17 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet 5.1.1.12 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. 5.1.1.13 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 contiguous, and must be in decreasing order starting with port 4. This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the PRT_DIS[1:0] pins will disable the appropriate ports. 5.1.1.14 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 contiguous, and must be in decreasing order starting with port 4. This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the PRT_DIS[1:0] pins will disable the appropriate ports. 5.1.1.15 Dynamic Power Controls the ability of the 4-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 4-port Hub will always switch to Self-Powered operation.} 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. 5.1.1.16 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. 5.1.1.17 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. 5.1.1.18 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. Revision 2.3 (08-27-07) 18 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet 5.1.1.19 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. 5.1.1.20 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. 5.1.1.21 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. 5.1.1.22 Power Switching Polarity The selection of active state "polarity" for the PRTPWR[4:1] pins 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. 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. SMSC USB2504/USB2504A 19 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet 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 4-port = 2504 4-Port = 2504 Product ID (assigned by Manufacturer). 5:4 2 0000 0000 Device ID (assigned by Manufacturer). Config Data Byte 1 6 1 98 1C Configuration data byte #1 for Hub options. Config Data Byte 2 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) VID 1:0 PID DID FIELD Revision 2.3 (08-27-07) 20 DATASHEET DESCRIPTION SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet 5.2.3.1 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. 5.2.3.3 DESCRIPTION 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 PORT_IND Port Indicator Support: Indicates implementation of LED indicators 0 = No LED indicators. 1 = LED indicators. 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. (Default) 1 = Full-Speed-Only (High-Speed disabled!) 4 MTT_ENABLE Multi-TT enable: Enables one transaction translator per port operation. 0 = single TT for all ports. 1 = one TT per port (multiple TT's supported) SMSC USB2504/USB2504A 21 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet BIT NUMBER BIT NAME 3 EOP_DISABLE DESCRIPTION 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 on a port-by-port basis, or ganged, or no overcurrent sensing. 00 = Ganged sensing (all ports together). (Default for self-power) 01 = Individual port-by-port. 1x = Over current sensing not supported. (may be used with Bus-Powered configurations only!, and is the default for bus-power) 0 PORT_PWR Port Power Switching: Indicates whether port power switching is on a portby-port basis or ganged. 0 = Ganged switching (all ports together) 1 = Individual port-by-port switching. 5.2.3.5 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 Reserved 5:4 OC_TIMER Reserved 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 Reserved Revision 2.3 (08-27-07) Reserved. 22 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet 5.2.3.6 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= Reserved Bit 6= Reserved Bit 5= Reserved Bit 4= 1; Port 4 non-removable. Bit 3= 1; Port 3 non-removable. 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= Reserved Bit 6= Reserved Bit 5= Reserved Bit 4= 1; Port 4 is disabled. Bit 3= 1; Port 3 is disabled. 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= Reserved Bit 6= Reserved Bit 5= Reserved Bit 4= 1; Port 4 is disabled. Bit 3= 1; Port 3 is disabled. Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = `0' SMSC USB2504/USB2504A 23 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub 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. Revision 2.3 (08-27-07) 24 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub 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 26. 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 27. 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). SMSC USB2504/USB2504A 25 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub 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. Revision 2.3 (08-27-07) 26 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub 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 SMSC USB2504/USB2504A 27 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub 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 Revision 2.3 (08-27-07) DESCRIPTION Least Significant Byte of the Vendor ID. 28 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub 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 PORT_IND Port Indicator Support: Indicates implementation of LED indicators 0 = No LED indicators. 1 = LED indicators. SMSC USB2504/USB2504A 29 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub 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 MTT_ENABLE Multi-TT enable: Enables one transaction translator per port operation. 0 = single TT for all ports. 1 = one TT per port (multiple TT's supported) 3 EOP_DISABLE 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 is on a port-by-port basis, or ganged, or no overcurrent sensing. 00 = Ganged sensing (all ports together). 01 = Individual port-by-port. 1x = Over current sensing not supported. (must only be used with BusPowered configurations!) 0 PORT_PWR Port Power Switching: Indicates whether port power switching is on a portby-port basis or ganged. 0 = Ganged switching (all ports together) 1 = Individual port-by-port switching. 5.3.9.9 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 Reserved Revision 2.3 (08-27-07) Reserved 30 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub 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 Bit Bit Bit Bit Bit Bit Bit 5.3.9.11 7= Reserved 6= Reserved 5= Reserved 4= 1; Port 4 non-removable. 3= 1; Port 3 non-removable. 2= 1; Port 2 non-removable. 1= 1; Port 1 non removable. 0 is Reserved, always = `0'. 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 Bit Bit Bit Bit Bit Bit Bit 5.3.9.12 7= Reserved 6= Reserved 5= Reserved 4= 1; Port 4 is 3= 1; Port 3 is 2= 1; Port 2 is 1= 1; Port 1 is 0 is Reserved, disabled. disabled. disabled. disabled. always = `0' 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 Bit Bit Bit Bit Bit Bit Bit 5.3.9.13 BIT NUMBER 7= Reserved 6= Reserved 5= Reserved 4= 1; Port 4 is 3= 1; Port 3 is 2= 1; Port 2 is 1= 1; Port 1 is 0 is Reserved, disabled. disabled. disabled. disabled. always = `0' Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00) BIT NAME SMSC USB2504/USB2504A DESCRIPTION 31 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet 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. 5.3.9.14 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. Revision 2.3 (08-27-07) 32 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet 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. 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 20 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 20 for the internal default values that are loaded when this option is selected. The Amber and 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. SMSC USB2504/USB2504A 33 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet +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. 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). Revision 2.3 (08-27-07) 34 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet 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). t6 Host acknowledges attach and signals USB Reset. t7 USB Idle. t8 Completion time for requests (with or without data stage). t1 RESET_N Asserted. t2 2.0 1400 nsec 1.5 sec 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 t1+t5. All Power Supplies must have reached the operating levels mandated in Section Chapter 8, "DC Parameters", prior to (or coincident with) the assertion of RESET_N. SMSC USB2504/USB2504A 35 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet 5.6.1.2 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. All Power Supplies must have reached the operating levels mandated in Section Chapter 8, "DC Parameters", prior to (or coincident with) the assertion of RESET_N. Revision 2.3 (08-27-07) 36 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet RESET_N for SMBus Slave Configuration 5.6.1.3 Hardware reset asserted Reset Negation SMBus Code Load t1 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: 5.6.2 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 8, "DC Parameters", prior to (or coincident with) the assertion of RESET_N. 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[4:1] to all downstream ports. 4. Clears all TT buffers. SMSC USB2504/USB2504A 37 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet 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) 38 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 6 Backward Compatibility to the USB20H04 The USB2504/USB2504A is pin compatible to the USB20H04, but is not designed to be a direct dropin replacement. Many existing USB20H04 designs may accommodate a USB2504/USB2504A in place of the USB20H04, as long as specific Bill-Of-Material (BOM) modifications and population option changes are implemented. Since each design is unique, every customer considering a change from a USB20H04 to a USB2504/USB2504A should contact SMSC Applications Engineering for assistance. 6.1 Internal 1.8V regulator The USB2504/USB2504A has two internal 1.8V regulators that are enabled by default (ATEST pin contains an internal pull-up, and was specified as a No-Connect in the USB20H04 datasheet). Each regulator requires a separate 4.7uF Low ESR capacitor to ground. The USB20H04 designs that directly connect the Digital and Analog 1.8V pins together will not support a USB2504/USB2504A (unless the internal regulators are disabled). 6.2 Configuration by Internal Defaults The internal default settings that are loaded when this option is selected are very similar (but not identical) to those that were loaded in the USB20H04. The CFG_SEL[2:0] pins will properly select this method if the existing USB20H04 design was set-up to load the configuration via internal defaults. The USB2504/USB2504A has pin strapping options that enable modification of the internal default load without requiring an EEPROM. The CFG_SEL2 pin (pin 59) on the USB2504/USB2504A was a VSS pin on the USB20H04 so this functionality will be disabled when a USB2504/USB2504A is placed into a USB20H04 design. 6.3 Configuration by SMBus The CFG_SEL[2:0] pins will properly select this method if the existing USB20H04 design was set-up to load the configuration via SMBus. The USB2504/USB2504A has a few additional registers, and has also moved some of the configuration bits so the actual SMBus code load itself will need to be modified. If a USB20H04 SMBus load is programmed into a USB2504/USB2504A, the results are unpredictable. 6.4 PRTPWR_POL The USB2504/USB2504A has a new strapping option that enables the port power control active state to be either active-high or active-low. The USB20H04 only provided active-low port power control. The PRTPWR_POL pin on the USB2504/USB2504A is pin 23, which was a VSS pin on the USB20H04, so by default, a USB20H04 design will select active-low port port control. SMSC USB2504/USB2504A 39 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 7 XNOR Test XNOR continuity tests all signal pins on the Hub (every pin except for NC, XTAL1/CLKIN, XTAL2, ATEST/REG_EN, RBIAS, TEST1, Power, and Ground). This functionality is enabled by driving TEST1 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. Revision 2.3 (08-27-07) 40 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 8 DC Parameters 8.1 Maximum Guaranteed Ratings PARAMETER SYMBOL MIN MAX UNITS Storage Temperature TA -55 150 C 325 C Lead Temperature 1.8V supply voltage VDDA18PLL VDD18 -0.5 2.5 V 3.3V supply voltage VDDA33 VDDA33PLL VDD33 -0.5 4.0 V Voltage on any I/O pin -0.5 (3.3V supply voltage + 2) 6 V Voltage on XTAL1 -0.5 4.0 V Voltage on XTAL2 -0.5 VDD18 + 0.3V V COMMENTS Soldering < 10 seconds 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. SMSC USB2504/USB2504A 41 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet 8.2 Recommended Operating Conditions PARAMETER SYMBOL MIN MAX UNITS Operating Temperature TA 0 70 C 1.8V supply voltage VDDA18PLL VDD18 1.71 1.98 V 3.3V supply voltage VDDA33 VDDA33PLL VDD33 3.0 3.6 V -0.3 5.5 V Voltage on any I/O pin COMMENTS 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 8.1 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 VDD33 Input Buffer with Pull-Up (IPU) Low Input Level VILI High Input Level VIHI 2.0 IILL +26 +72 uA IIHL -10 +10 uA Low Input Leakage High Input Leakage TTL Levels V VIN = 0 VIN = VDD33 Input Buffer with Pull-Down IPD 0.8 V Low Input Level VILI High Input Level VIHI 2.0 IILL +10 -10 uA IIHL -22 -82 uA Low Input Leakage High Input Leakage Revision 2.3 (08-27-07) TTL Levels V VIN = 0 VIN = VDD33 42 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Table 8.1 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 VDD33 O12 and I/O12 Type Buffer Low Output Level High Output Level Output Leakage VOL VOH 2.4 V IOL = 12mA @ VDD33 = 3.3V IOH = -4mA @ VDD33 = 3.3V IOL +10 uA VOL 0.4 V +10 A 0.4 V IOL = 12 mA @ VDD33 = 3.3V +10 A 350 mV VIN = 0 to VDD33 (Note 1) VIN = 0 to VDD33 (Note 1) OD12 Type Buffer Low Output Level Output Leakage IOL -10 IOL = 12mA @ VDD33 = 3.3V VIN = 0 to VDD33 (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 100 95 mA mA Total from all supplies Supply Current Configured (High-Speed Host) 2 Ports @ FS/LS 2 Ports @ HS 1 Port HS, 1 Port FS/LS 3 Ports @ HS 4 Ports @ HS SMSC USB2504/USB2504A IHCC2 IHCH2 IHCH1C1 IHCH3 IHCC4 190 235 215 265 295 43 DATASHEET mA mA mA mA mA Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Table 8.1 DC Electrical Characteristics (continued) PARAMETER SYMBOL MIN TYP MAX UNITS Supply Current Configured (Full-Speed Host) COMMENTS Total from all supplies mA mA mA mA 1 Port 2 Ports 3 Ports 4 Ports IFCC1 IFCC2 IFCC3 IFCC4 150 155 160 165 Supply Current Suspend ICSBY 265 uA Total from all supplies. Supply Current Reset IRST 150 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; VDD33 = 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. Revision 2.3 (08-27-07) 44 DATASHEET SMSC USB2504/USB2504A Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 9 AC Specifications 9.1 Oscillator/Clock Crystal: Parallel Resonant, Fundamental Mode, 24 MHz 100ppm. External Clock: 50% Duty cycle 10%, 24 MHz 100ppm, Jitter < 100ps rms. 9.1.1 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). 9.1.2 I2C EEPROM: Frequency is fixed at 59KHz 20%. 9.1.3 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. SMSC USB2504/USB2504A 45 DATASHEET Revision 2.3 (08-27-07) Integrated USB 2.0 Compatible 4-Port Hub Datasheet Chapter 10 Package Outline Figure 10.1 64 Pin TQFP Package Outline (10x10x1.4 mm body - 2 mm footprint) Table 10.1 64 Pin TQFP Package Parameters A A1 A2 D D1 E E1 H L L1 e q W R1 R2 ccc MIN NOMINAL MAX REMARKS ~ 0.05 1.35 11.80 9.80 11.80 9.80 0.09 0.45 ~ ~ ~ ~ ~ ~ ~ ~ ~ 0.60 1.00 0.50 Basic ~ 0.22 ~ ~ ~ 1.60 0.15 1.45 12.20 10.20 12.20 10.20 0.20 0.75 ~ 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 Lead Foot Angle Lead Width Lead Shoulder Radius Lead Foot Radius Coplanarity 0o 0.17 0.08 0.08 ~ 7o 0.27 ~ 0.20 0.08 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 per side. 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) 46 DATASHEET SMSC USB2504/USB2504A