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USB2503/
USB2503A
Integrated USB 2.0
Compatible 3-Port Hub
Datasheet
PRODUCT FEATURES
On-Board 24MHz Crystal Driver Circuit or 24 MHz
external clock driver
Integrated USB 2.0 Compatible 3-Port Hub
— 3 Transaction Translators for highest performance
Internal PLL for 480MHz USB 2.0 Sampling
— High-Speed (480Mbits/s), Full-Speed (12Mbits/s) and
Internal 1.8V Linear Voltage Regulator
Low-Speed (1.5Mbits/s) compatible
Integrated USB termination and Pull-up/Pull-down
— Full power manage
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet ORDER NUMBERS: USB2503/USB2503A-HZH FOR 48 PIN QFN LEAD-FREE ROHS COMPLIANT PACKAGE 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2007 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Altho
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Table of Contents Chapter 1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 1.1 OEM Selectable Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Chapter 2 Pin Table 3-Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Chapter 3 Pin Configuratio
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet List of Figures Figure 3.1 3-Port 48-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4.1 3-Port Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 5.1 LED Strapping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet List of Tables Table 4.1 3-Port Hub Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 4.2 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 4.3 Miscellaneous Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 4.4 Power,
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Chapter 1 General Description The SMSC 3-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 3-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 m
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Chapter 2 Pin Table 3-Port Table 2.1 3-Port Pin Table UPSTREAM USB 2.0 INTERFACE (3-PINS) USBDP0 USBDN0 VBUS_DET 3-PORT USB INTERFACE (18-PINS) USBDP1 USBDN1 USBDP2 USBDN2 USBDP3 USBDN3 GR1/ GR2/ NON_REM0 NON_REM1 GR3/ PRTPWR1 PRTPWR2 PRTPWR3 PRT_DIS0 PRTPWR_POL OCS1_N OCS2_N OCS3_N GANG_EN RBIAS SERIAL PORT (3-PINS) SDA/SMBDATA SCL/SMB- CFG_SEL1 CLK/CFG_SEL0 MISC (8-PINS) XTAL1/CLKIN XTAL2 RESET_N SELF_PWR TEST1 TEST0 ATEST/ CLKIN_EN REG_EN PO
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Chapter 3 Pin Configuration 3-Port Hub RESET_N 37 24 TEST0 VSS 38 23 VDD18 VDD33CR 39 22 VSS VDD18 40 21 GR1/NON_REM0 SMSC VSS 41 20 GANG_EN USB2503 XTAL2 42 19 GR2/NON_REM1 & XTAL1/CLKIN 43 18 PRTPWR_POL USB2503A VDDA18PLL 44 17 GR3/PRT_DIS0 VDDA33PLL 45 16 PRTPWR2 (Top View QFN-48) ATEST/REG_EN 46 15 OCS3_N Thermal Slug RBIAS 47 14 PRTPWER3 (must be connected to VSS) VSS 48 13 VDDA33 Indicates pins on the bottom of the device. Figure 3.1 3-Por
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Chapter 4 3-Port Hub Block Diagram To EEPROM Pin or SMBus Upstream Upstream 24 MHz 1.8V Strapping 3.3V Master USB Data V Crystal Cap Options BUS SD SCL Internal V 1.8V Serial BUS PLL Defaults Interface Power Reg. Upstream Select Detect PHY SIE Controller Repeater TT TT TT Port #1 #2 #3 Controller Routing Logic Port #1 Port #3 Downstream OC Sense Downstream OC Sense ... PHY #1 Switch Driver PHY #3 Switch Driver LED Drivers LED Drivers Downstream
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Table 4.1 3-Port Hub Pin Descriptions (continued) NAME SYMBOL TYPE FUNCTION 3-PORT USB 2.0 HUB INTERFACE High-Speed USB USBDN[3:1] IO-U These pins connect to the downstream USB peripheral devices attached to the Hub’s ports. Data USBDP[3:1] USB Power PRTPWR[3:1] O12 Enables power to USB peripheral devices (downstream). Enable The active signal level of the PRTPWR[3:1] pins are determined by the Power Polarity Strapping function of the PRTPW
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Table 4.1 3-Port Hub Pin Descriptions (continued) NAME SYMBOL TYPE FUNCTION Port Power PRTPWR_POL I/O12 Port Power Polarity strapping determination for the active signal polarity of the PRTPWR[3:1] pins. Polarity strapping. 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[3:1] pins in order to ensure that downstream port power is not inadve
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Table 4.3 Miscellaneous Pins (continued) NAME SYMBOL TYPE FUNCTION 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 CLKIN_EN I Clock In Enable: Enable Low = XTAL1 and XTAL2 pins configured for use with external crystal High = XTAL1 p
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Table 4.4 Power, Ground, and No Connect (continued) NAME SYMBOL TYPE FUNCTION VDD3P3 VDD33CR +3.3V I/O and Core power. CORE PLL VSS VSS Ground. Table 4.5 Buffer Type Descriptions BUFFER DESCRIPTION I 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 Specificati
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet Chapter 5 Functional Block Description 5.1 3-Port Hub SMSC’s USB 2.0 3-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 3-Port Hub provides 1 Transaction Translator (TT) per port (defined as Multi-TT configuratio
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Integrated USB 2.0 Compatible 3-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. 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 opti
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet 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 non- removable. 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
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet 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
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet 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 DEFAULT BYTE CFG CFG MSB: SIZE SELF BUS FIELD LSB (BYTES) (HEX) (HEX) DESCRIPTION VID 1
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet 5.2.3.1 EEPROM Offset 1:0(h) - Vendor ID BIT NUMBER BIT NAME DESCRIPTION 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 EEPROM Offset 3:2(h) - Product ID BIT NUMBER BIT NAME DESCRIPTION 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 EEPROM Offset 5:4(h) - Device ID BIT NUMBER BIT NAME DESCRIPTION 15:8 DID_MSB
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Integrated USB 2.0 Compatible 3-Port Hub Datasheet BIT NUMBER BIT NAME DESCRIPTION 3 EOP_DISABLE 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. 00 = Ganged sensing (all ports together). (Default for self-power) 01 = Individual po
