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Manual SMSC USB2504

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  • SMSC USB2504 - page 1

    SMSC USB2504/USB2504A DA T ASHEET Revision 2.3 (08-27-07) Datasheet PRODUCT FEA TURES USB2504/ USB2504A Integrated USB 2.0 Comp atible 4-Port Hub  Integrated USB 2.0 Compatible 4-Port Hub — 4 T ransaction T ranslators for highest perfo rmance — High-S peed (480Mbits/s), Full-S pe ed (12Mbits/s) and Low-S peed (1.5Mbits/s) compatible — Full ...

  • SMSC USB2504 - page 2

    ORDER NUMBERS: USB2504/USB2504A-JT FOR 64 PIN TQ FP LEAD-FREE R OHS COMPLIANT P ACKAGE Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 2 SMSC USB2504/USB2504A DA T ASHEET 80 ARKA Y DRIVE, HAUPP AUGE, NY 1 1788 (631) 435-6 000, FAX ( 631) 273-3123 Copyright © 20 07 SMSC or its subsidiari es. All rights reserved. Circuit d ...

  • SMSC USB2504 - page 3

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 3 Revision 2.3 (08-27-07) DA T ASHEET T able of Content s Chapter 1 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1 OEM Selectable Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

  • SMSC USB2504 - page 4

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 4 SMSC USB2504/USB2504A DA T ASHEET Chapter 10 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 ...

  • SMSC USB2504 - page 5

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 5 Revision 2.3 (08-27-07) DA T ASHEET List of Figures Figure 3.1 4-Port 64 Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 4.1 4-Port Block Diagram . . . . . . . . . . . . . . . . . . . . . . . ...

  • SMSC USB2504 - page 6

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 6 SMSC USB2504/USB2504A DA T ASHEET List of T ables Table 2. 1 4-Port Pin Table for 64-TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 4. 1 4-Port Hub Pin Descriptions . . . . . . . . . . . . . . . . . . . . . ...

  • SMSC USB2504 - page 7

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 7 Revision 2.3 (08-27-07) DA T ASHEET Chapter 1 General Description The SMSC 4-Port Hub is fully complian t with th e USB 2.0 S pecification and will attach to a USB host as a Full-S peed Hub or as a Full-/High-Speed Hub. The 4-Port Hub supports Low-S peed, Full-S peed, and Hi ...

  • SMSC USB2504 - page 8

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 8 SMSC USB2504/USB2504A DA T ASHEET Chapter 2 Pin T able 4-Port T abl e 2.1 4-Port Pin T able for 64-TQFP UPSTREAM USB 2.0 INTERF ACE (3 PINS) USBDP0 USBDN0 VBUS_DET 4-PORT USB 2.0 INTERF ACE (26 PINS) USBDP1 USBDN1 USBDP2 USBDN2 USBDP3 USBDN3 USBDP4 USBDN4 GR1/ NON_REM0 GR2 ...

  • SMSC USB2504 - page 9

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 9 Revision 2.3 (08-27-07) DA T ASHEET Chapter 3 Pin Configuration 4-Port Hub Figure 3.1 4-Port 64 Pi n TQFP CFG_SEL1 RESET_N SELF_PWR VBUS_DET VSS VDD18 VSS NC XTAL2 TEST0 NC VDD18 VSS GR1/NON_ REM0 VDD33 AM1/GANG_EN GR2/NON_REM1 AM2/MTT_EN OCS3_N PRTPWR2 OCS2_N VDD18 VSS CLKI ...

  • SMSC USB2504 - page 10

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 10 SMSC USB2504/USB2504A DA T ASHEET Chapter 4 4-Port Hub Block Diagram Figure 4.1 4-Port Bloc k Diagram T able 4.1 4-Port Hub Pin Descript ions NAME SYMBOL T YPE FUNCTION UPSTREAM USB 2.0 INTERF ACE USB Bus Data USBDN0 USBDP0 IO-U These pins connect to the upstream USB bus ...

  • SMSC USB2504 - page 11

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 1 1 Revision 2.3 (08-27-07) DA T ASHEET 4-PORT USB 2.0 HUB INTERF ACE High-S peed 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 dev ...

  • SMSC USB2504 - page 12

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 12 SMSC USB2504/USB2504A DA T ASHEET 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 th e internal defaul t configuration, thi ...

  • SMSC USB2504 - page 13

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 13 Revision 2.3 (08-27-07) DA T ASHEET SERIAL PORT INTERF ACE Serial Data/SMB Data SDA/SMBDA T A 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 multifunct ...

  • SMSC USB2504 - page 14

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 14 SMSC USB2504/USB2504A DA T ASHEET 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 s ...

  • SMSC USB2504 - page 15

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 15 Revision 2.3 (08-27-07) DA T ASHEET T able 4.5 Buffer T ype 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 dra ...

  • SMSC USB2504 - page 16

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 16 SMSC USB2504/USB2504A DA T ASHEET Chapter 5 Functional Block Description 5.1 4-Port Hub SMSC’s USB 2.0 4-Port Hub is fully specification co mpliant to the Universal Serial Bus S pecificati on Revision 2.0 April 27,2000 (12/7/ 2000 and 5/28/2002 Errata). Please reference ...

  • SMSC USB2504 - page 17

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 17 Revision 2.3 (08-27-07) DA T ASHEET 5.1.1.5 Port Indicators Controls the use of LED indicator for Po rt status information. See Se ction 1 1.5.3 of the USB 2.0 S pecification for additional de tails. This field is set by the OEM using either the SMBus or EEPROM interface op ...

  • SMSC USB2504 - page 18

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 18 SMSC USB2504/USB2504A DA T ASHEET 5.1.1.12 Non-Re movable Device Informs the Host if one of the active ports has a permanent device that is undetachable from the Hub. (Note: The device must prov ide its own descripto r data.) This field is set by the OEM using either the ...

  • SMSC USB2504 - page 19

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 19 Revision 2.3 (08-27-07) DA T ASHEET 5.1.1.19 Self-powered Hub Controller Curre nt When in Self-Powered configurati on, Maximum current requirements of the Hub Controller in 2mA increments. This field is set by the OEM using eith er the SMBus or EEPROM interface options. 5.1 ...

  • SMSC USB2504 - page 20

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 20 SMSC USB2504/USB2504A DA T ASHEET 5.2.1.2 Pull-Up Resistor The Circuit board designe r is required to place external pull-up resistors (10K Ω re commended) on the SDA/SMBDA T A & SCL/SMBCLK/CFG _SELO lines (per SMBus 1.0 S pecification, and EEPROM manufacturer guidel ...

  • SMSC USB2504 - page 21

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 21 Revision 2.3 (08-27-07) DA T ASHEET 5.2.3.1 EEPROM Offset 1:0(h) - V endor ID 5.2.3.2 EEPROM Offset 3:2(h) - Product ID 5.2.3.3 EEPROM Offset 5:4(h) - Device ID 5.2.3.4 EEPROM Offset 6(h) - CONFIG_BYTE_1 BIT NUMBER BIT NAME DESCRIPTION 15:8 VID_MSB Most Signi ficant Byte of ...

  • SMSC USB2504 - page 22

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 22 SMSC USB2504/USB2504A DA T ASHEET 5.2.3.5 EEPROM Offset 7(h) - CONFIG_BYTE_2 3 EOP_DISABLE EOP Disable: Disables EOP generation at EOF1 when no dow nstream directed traffic is in progress. 0 = EOP generati on at EOF1 is enabled. 1 = EOP generati on at EOF1 is disabled, (n ...

  • SMSC USB2504 - page 23

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 23 Revision 2.3 (08-27-07) DA T ASHEET 5.2.3.6 EEPROM Offset 8(h) - Non-Removable Device 5.2.3.7 EEPROM Offset 9(h) - Port Disable For Self Powered Operation 5.2.3.8 EEPROM Offs et A(h) - Port Disable For Bus Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7:0 NR _DEVICE Non ...

  • SMSC USB2504 - page 24

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 24 SMSC USB2504/USB2504A DA T ASHEET 5.2.3.9 EEPROM Offs et B(h) - Max Power For Self Powered Operation 5.2.3.10 EEPROM Offs et C(h) - Max Power For Bus Powered Operation 5.2.3.1 1 EEPROM Offset D(h) - Hub Controller Max Current For Self Powered Operation BIT NUMBER BIT NAME ...

  • SMSC USB2504 - page 25

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 25 Revision 2.3 (08-27-07) DA T ASHEET 5.2.3.12 EEPROM Offs et E(h) - Hub Controller Max Current For Bus Powered Operation 5.2.3.13 EEPROM Of fset F(h) - Power-On T ime 5.3 SMBus Slave Interface Instead of loading User-Defi ned Descriptor data from an external EEPROM, the SMSC ...

  • SMSC USB2504 - page 26

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 26 SMSC USB2504/USB2504A DA T ASHEET 5.3.1.1 Byte Protocols When using the Hub SMBus Interface for byte trans fers, a write will al ways consist of the SMBus Interface Slave Address byte, foll owed by the Internal Address Register by te, then the data byte. The normal read p ...

  • SMSC USB2504 - page 27

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 27 Revision 2.3 (08-27-07) DA T ASHEET 5.3.4 S lave Device Time-Out According to the SMBus S pecificat ion, V1.0 devices in a transfer can a bort the transfer in progress and release the bus when any single clock low interval exceeds 25ms (T TIMEOUT , MIN ). Devices that have ...

  • SMSC USB2504 - page 28

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 28 SMSC USB2504/USB2504A DA T ASHEET 5.3.9.1 Register 00h: S tatus/Command ( Reset = 0x00) 5.3.9.2 Register 01h: V endor ID (LSB) (Reset = 0x00) 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 (S ...

  • SMSC USB2504 - page 29

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 29 Revision 2.3 (08-27-07) DA T ASHEET 5.3.9.3 Register 02h: V endor ID (MSB) (Reset = 0x00 ) 5.3.9.4 Register 03h: Product ID (LSB) (Reset = 0x00) 5.3.9.5 Register 04h: Product ID (MSB) (Reset = 0x00) 5.3.9.6 Register 05h: Device ID (LSB) (Reset = 0x00) 5.3.9.7 Register 06h: ...

  • SMSC USB2504 - page 30

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 30 SMSC USB2504/USB2504A DA T ASHEET 5.3.9.9 Register 08h: Co nfiguration Dat a Byte 2 (Reset = 0x00) 5 HS_DISABLE High S peed Disable: Di sables the capability to at tach as either a High/Full- speed device, and forces attachment as Full-speed only i.e. (no High-S peed supp ...

  • SMSC USB2504 - page 31

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 31 Revision 2.3 (08-27-07) DA T ASHEET 5.3.9.10 Register 09h: Non- Removable Device (R eset = 0x00) 5.3.9.1 1 Register 0Ah: Po rt Disable For Self Powered Operation (Rese t = 0x00) 5.3.9.12 Register 0Bh: Port Disa ble For Bus Powered Operation (Reset = 0x00) 5.3.9.13 Register ...

  • SMSC USB2504 - page 32

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 32 SMSC USB2504/USB2504A DA T ASHEET 5.3.9.14 Register 0Dh: Max Power For Bus Powered Operation (Reset = 0x00) 5.3.9.15 Register 0Eh: Hub Contr oller Max Curr ent For Self Powered Opera tion (Reset = 0x00) 5.3.9.16 Register 0Fh: Hu b Controller Max Current For Bus Powere d O ...

  • SMSC USB2504 - page 33

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 33 Revision 2.3 (08-27-07) DA T ASHEET 5.3.9.17 Register 10h: Power-On T ime (Reset = 0x00) 5.3.9.18 Undefi ned Registe rs The registers shown in Ta b l e 5 . 4 are the defined reg isters in the Hub. Reads to un defined registers return 00h. Writes to undefined registers have ...

  • SMSC USB2504 - page 34

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 34 SMSC USB2504/USB2504A DA T ASHEET Figure 5.1 LED Strappi ng Option 5.6 Reset There are two different resets th at the Hub experiences. One is a hardware reset (via the RESET_N pin) and the second is a USB Bus Reset. 5.6.1 E xternal Hardware RESET_N A valid hardware reset ...

  • SMSC USB2504 - page 35

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 35 Revision 2.3 (08-27-07) DA T ASHEET 5.6.1.1 RESET_N for St rappin g Option Configuration Figure 5.2 Reset_N Timing fo r Default/Stra p O ption Mode Notes:  When in Bus-Powered mode, the Hub and its asso ciated circuitry must not consume more than 100mA from the upstream ...

  • SMSC USB2504 - page 36

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 36 SMSC USB2504/USB2504A DA T ASHEET 5.6.1.2 RESET_N for EEPROM Configuration Figure 5.3 Reset_N Ti ming for EEPROM Mode Notes:  When in Bus-Powered mode, the Hub and its asso ciated circuitry must not consume more than 100mA from the upstream USB pow er source during t4 ...

  • SMSC USB2504 - page 37

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 37 Revision 2.3 (08-27-07) DA T ASHEET 5.6.1.3 RESET_N for SMBus Slave Configuration Figure 5.4 Reset_N Timing for SMBus Mode Notes:  For Bus-Powered configu rations, the 99.5ms (MAX) is re quired, and the Hu b and its associated circuitry must not consume more than 1 00mA ...

  • SMSC USB2504 - page 38

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 38 SMSC USB2504/USB2504A DA T ASHEET 5. Moves device from suspended to active (if suspende d). 6. Complies with Section 1 1.10 of the USB 2.0 S peci f ication for behavior after completion of the reset sequence. The Host then configures the Hub and the Hub’s do wnstream po ...

  • SMSC USB2504 - page 39

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 39 Revision 2.3 (08-27-07) DA T ASHEET Chapter 6 Backward Comp atibility to the USB20H04 The USB2504/USB2504A is pin compatible to the USB20H04, but is not designed to be a direct drop- in replacement. Many existing USB20H04 desig ns may accommodate a USB2 504/USB2504A in plac ...

  • SMSC USB2504 - page 40

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 40 SMSC USB2504/USB2504A DA T ASHEET Chapter 7 XNOR T est XNOR continuity tests all signal pin s on the Hub (every pin except for NC, XT AL1/CLKIN, XT AL2, A TEST/REG_EN, RBIAS, TEST1 , Power , and Ground). This functionality is enabled by driving TEST1 and CFG_SEL[1] high, ...

  • SMSC USB2504 - page 41

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 41 Revision 2.3 (08-27-07) DA T ASHEET Chapter 8 DC Parameters 8.1 Maximum Guaranteed Ratings Note: S tresses above th e specified parameters coul d cause permanen t damage to the device. This is a stress rating only and functional operation of the device at any condition abov ...

  • SMSC USB2504 - page 42

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 42 SMSC USB2504/USB2504A DA T ASHEET 8.2 Recommended Operating Conditions PARAMETER SYMBOL MIN MAX U NITS COMMENTS Operating T e mperature T A 07 0 ° C 1.8V supply voltage V DDA18PLL V DD18 1.71 1.98 V 3.3V supply voltage V DDA33 V DDA33PLL V DD33 3.0 3.6 V V oltage on any ...

  • SMSC USB2504 - page 43

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 43 Revision 2.3 (08-27-07) DA T ASHEET ICLK Input Buffer Low Input Le vel High Input Le ve l Input Leakage Hysteresis V ILCK V IHCK I IL V HYSC 2.0 -10 50 0.8 +10 100 V V uA mV TTL Levels V IN = 0 to V DD33 O12 and I/O12 Type Buffer Low Output Level High Output Level Output Le ...

  • SMSC USB2504 - page 44

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 44 SMSC USB2504/USB2504A DA T ASHEET Notes: 1. Output leakage i s measured with the current pins in high impedance. 2. See USB 2.0 S pecificatio n for U SB DC electrical characteristics. 3. RBIAS is a 3.3V tolerant an alog pin. CAP ACIT ANCE T A = 25°C; fc = 1MHz; V DD33 = ...

  • SMSC USB2504 - page 45

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet SMSC USB2504/USB2504A 45 Revision 2.3 (08-27-07) DA T ASHEET Chapter 9 AC S pecifications 9.1 Oscillator/Clock Crystal: Parallel Resonant, Fundamental Mode, 24 MHz ± 100ppm. External Clock: 50% Duty cycl e ± 1 0 % , 2 4 M H z ± 10 0ppm, Jitter < 100 ps rms. 9.1.1 S MBus Interface: The SMSC Hu ...

  • SMSC USB2504 - page 46

    Integrated USB 2.0 Compatible 4-Port Hub Datasheet Revision 2.3 (08-27-07) 46 SMSC USB2504/USB2504A DA T ASHEET Chapter 10 Package Outline Figure 10.1 64 Pin TQFP Packag e Outline (10x10x1.4 m m body - 2 mm foot print) Notes: 1. Controlling Unit: millimete r . 2. T olera nce on the true position of the leads is ± 0 .04 mm maximum. 3. Package body ...

Manufacturer SMSC Category Switch

Documents that we receive from a manufacturer of a SMSC USB2504 can be divided into several groups. They are, among others:
- SMSC technical drawings
- USB2504 manuals
- SMSC product data sheets
- information booklets
- or energy labels SMSC USB2504
All of them are important, but the most important information from the point of view of use of the device are in the user manual SMSC USB2504.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals SMSC USB2504, service manual, brief instructions and user manuals SMSC USB2504. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product SMSC USB2504.

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A complete manual for the device SMSC USB2504, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use SMSC USB2504 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of SMSC USB2504.

A complete SMSC manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual SMSC USB2504 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the SMSC USB2504, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the SMSC USB2504, that we can find in the current document
3. Tips how to use the basic functions of the device SMSC USB2504 - which should help us in our first steps of using SMSC USB2504
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with SMSC USB2504
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of SMSC USB2504 in a specific country, if it was not possible to solve the problem on our own.

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