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SMSC USB2502 User's Manual

1. NAME SYMBOL TYPE FUNCTION Analog Test ATEST AlO This signal is used for testing the analog section of the amp REG_EN chip and to enable or disable the internal 1 8v regulator Internal 1 8V POPRI voltage This pin must be connected to VDDA33 to enable the regulator internal 1 8V regulator or to VSS to disable the internal enable 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 TYPE FUNCTION VDDCORE3P3 VDD33CR 3 3V I O Power If the internal core 1 8V regulator is enabled then this pin acts as the regulator input VDD1P8 VDD18 1 8V core power If the internal regulator is enabled then VDD18 pin 27 must have a 4 7 or greater 20 ESR lt 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 4 7uF or greater 20 ESR 5019 capacitor to VSS VDDA3P3 VDDA33 3 3V Filtered analog power VSS VSS Ground Table 4 5 Buffer Type Descriptions BUFFER DESCRIPTION Input IPD Input with a w
2. 6 11 Selectable 6 Chapter 2 Pin Table 2 7 Chapter 3 Pin Configuration 2 Port Hub 9 Chapter 4 2 Port Hub Block 11 Chapter 5 Functional Block 16 51 2 AUD rcm 16 5 1 1 Hub Configuration Options 16 5 1 2 VBus Detect iu ete hene Dee ad eed a ESAE RU TR RIA 18 5 2 EEPROM 19 5 2 1 I2C EEPROM 5255 dae enka wale PR e RC a a eel 19 5 2 2 In Circuit EEPROM 19 5 2 3 EEPROM DATA xd eene cides caer eae eee eae baa dee Bee ae es 19 5 3 SMBus Slave 24 5 3 1 Bus Protocols PEDE 24 5 3 2 Invalid Protocol Response 25 5 3 3 General Call Address 25 5 3 4 Slave Device 1 26 5 3 5 Stretching the SCLK
3. ESE 42 Chapter 9 Package 43 SMSC USB2502 Revision 2 3 08 27 07 3 DATASHEET SMSC 2 Port USB 2 0 Hub Controller List of Tables Table 2 1 Table 2 2 Table 4 1 Table 4 2 Table 4 3 Table 4 4 Table 4 5 Table 5 1 Table 5 2 Table 5 3 Table 5 4 Table 5 5 Table 5 6 Table 5 7 Table 7 1 Table 9 1 Revision 2 3 08 27 07 Datasheet 2 Port Pin Table for 36 7 2 Port Pin Table for 48 8 2 Port Hub Pin Descriptions 11 SMBus EEPROM Interface Behavior 13 Miscellaneous Pins 13 Power Ground and No 14 Buffer Type 14 User Defined Descriptor 19 SMBus Write Byte 4 25 SMBus Read Byte 1 1 25 SMBus Slave Interface Register 26 Reset N Timing for Default Strap Option Mode 33 Res
4. 26 5 3 6 SMBUS TIMING uia Rx RE be ER ERES 26 5 3 7 Bus Reset 26 5 3 8 SMBus Alert Response 00 55 26 5 3 9 Internal SMBus Memory Register 26 5 4 Default Configuration 32 5 5 Default Strapping 32 5 0 CI E 32 5 6 1 External Hardware RESET 33 5 6 2 USB Bus 36 Chapter 2 5555 rede RR 37 Chapter 7 DC 38 7 1 Maximum Guaranteed 1 38 7 2 Recommended Operating 39 Chapter 8 AC 42 8 4 Oscilator ClockK bkn p desk 42 8 1 1 SMBus 1 42 8 1 2 I2C EEPROM 5254546 eese Ed px ma LEUR Rs eee ented PANE 42 8 1 3 Bic Stee os ew ri raa
5. This field is set by the OEM using either the SMBus or EEPROM interface options Power Switching Polarity The selection of active state polarity for the PRTPWR2 pin is made by a strapping option only 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 18 SMSC USB2502 DATASHEET 2 Port USB 2 0 Hub Controller Datasheet 5 2 5 2 1 5 2 1 1 5 2 1 2 5 2 1 3 5 2 2 5 2 3 SMSC EEPROM Interface The SMSC Hub 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 2 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 2 EEPROM The 2 EEPROM interface implements a subset of the 2 Master Specification Please refer to the Philips Semiconductor Standard
6. 2 Port 36 Pin QFN SMSC USB2502 Revision 2 3 08 27 07 9 DATASHEET SMSC VDD33CR VDD33CR VSS VSS XTAL2 XTAL1 CLKIN VDDA18PLL VDDA18PLL VDDA33PLL ATEST REG_EN RBIAS VSS Revision 2 3 08 27 07 L RESET CFG SEL1 TEST SCL SMBCLK CFG SELO VBUS DET 1 CLKIN EN USB2502 48 TQFP USBDPO L USBDNO L vss LJ vss L USBDN1 L USBDP1 VDDA33 L VDDA33 L_ 2 Port USB 2 0 Hub Controller Datasheet SDA SMBDATA NC NC NC VDD18 VSS NC SELF_PWR OCS_N PRTPWR PRTPWR_POL GR2 NON_REM1 GR1 NON REMO vss LJ USBDP2 USBDN2 L Figure 3 2 2 Port 48 Pin TQFP 10 DATASHEET SMSC USB2502 2 Port USB 2 0 Hub Controller Datasheet SMSC Chapter 4 2 Port Hub Block Diagram Upstream Upstream 24 MHz To EEPROM or Vsus USB Data Crystal SMBus Master sav 1 8V 90 PLL Serial Bus Power Upstream Interface Detect PHY ESV Reg ilii Repeater SIE 1 Controller 1 iL T tion Translat Fort ransaction Translator Controller Routing Logic p OC Sense Switch Driver Downstream PHY 1 LED Driver Downstream PHY 2 Strapping Options Downstream Switch LED Downstream USB Data Sense Driver opt s USB Data Figure 4 1 2 Port Block Diagram Table 4 1 2 Port Hub Pin Descripti
7. 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 NRD 7 6 5 4 3 2 1 0 Devices OAh R W Port Disable Self PDS 7 6 5 4 3 2 1 0 OBh R W Port Disable Bus PDB 7 6 5 4 3 2 1 0 Revision 2 3 08 27 07 26 DATASHEET SMSC USB2502 2 Port USB 2 0 Hub Controller SMSC Datasheet Table 5 4 SMBus Slave Interface Register Map continued REG BIT 7 BITO ADDR R W REGISTER NAME ABBR MSB BIT6 BIT5 BIT4 BIT3 BIT2 BIT1 LSB OCh R W Max Power Self MAXPS 7 6 5 4 3 2 1 0 ODh R W Max Power Bus MAXPB 7 6 5 4 3 2 1 0 OEh R W Hub Controller HCMCS 7 6 5 4 3 2 1 0 Max Current Self OFh R W Hub Controller HCMCB 7 6 5 4 3 2 1 0 Max Current bus 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 DESCRIPTION 7 3 Reserved Reserved Note Software must never write a 1 to these bits 2 RESET 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 bi
8. DATASHEET Revision 2 3 08 27 07 2 Port USB 2 0 Hub Controller SMSC Chapter 8 AC Specifications Datasheet 8 1 Oscillator Clock Crystal Parallel Resonant Fundamental Mode 24 MHz 100ppm External Clock 50 Duty cycle 10 24 MHz 100ppm Jitter lt 100ps rms 8 1 1 SMBus Interface The SMSC Hub conforms to all voltage power and timing characteristics and specifications as set forth in the SMBus 1 0 Specification for Slave Only devices except as noted in Section 5 3 8 1 2 2 EEPROM Frequency is fixed at 59KHz 20 8 1 3 USB 2 0 The Hub conforms to all voltage power and timing characteristics and specifications as set forth in the USB 2 0 Specification Please refer to the USB Specification for more information Revision 2 3 08 27 07 SMSC USB2502 42 DATASHEET 20 22 80 z uoisi ed ldaHSVlVva v ce0Scasn 9SNS Chapter 9 Package Outlines 3 TERMINAL 1 IDENTIFIER AREA 01 2 X E1 2 0 6 36X 0 2 MIN CHAMFERED CORNERS ARE OPTIONAL 4X TOP VIEW 4 0 12 SIDE VIEW 3 D VIEWS NOTES 1 ALL DIMENSIONS ARE IN MILLIMETER 2 POSITION TOLERANCE OF EACH TERMINAL IS 0 05mm AT MAXIMUM MATERIAL CONDITION DIMENSIONS REVISION REVISION HISTORY DESCRIPTION SEE SPEC FRONT PAGE FOR REVISION HISTORY RELEASED BY TERMINAL 1 IDENTIFIER AREA 0 2 X 2 3 EXPOSED PAD 4 B
9. Device Indicates which port s include non removable devic es 0 port is removable 1 port is non removable Bit 7 32 0 Reserved Bit 22 1 Port 2 non removable Bit 12 1 Port 1 non removable Bit 0 is Reserved always 0 5 2 3 7 EEPROM Offset 9 h Port Disable For Self Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7 0 PORT_DIS_SP Port Disable Self Powered Disables 1 or more contiguous ports 0 port is available 1 port is disabled Bit 7 3 0 Reserved Bit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit 0 is Reserved always 0 5 2 3 8 EEPROM Offset A h Port Disable For Bus Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7 0 PORT_DIS_BP Port Disable Bus Powered Disables 1 or more contiguous ports 0 port is available 1 port is disabled Bit 7 3 0 Reserved Bit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit 0 is Reserved always 0 Revision 2 3 08 27 07 22 SMSC USB2502 DATASHEET 2 Port USB 2 0 Hub Controller Datasheet ee sms 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
10. Internal Default Configuration via strapping options 1 1 2 wire I2C EEPROMS are supported Table 4 3 Miscellaneous Pins NAME SYMBOL TYPE FUNCTION Crystal XTAL1 ICLKx 24MHz crystal or external clock input Input External CLKIN This pin connects to either one terminal of the crystal or Clock Input 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 CLKIN_EN Clock In Enable Enable Low XTAL1 and XTAL2 pins configured for use with external crystal High XTAL1 pin configured as CLKIN and must be driven by an external CMOS clock RESET Input RESET_N IS This active low signal is used by the system to reset the chip The minimum active low pulse is 1us Self Power SELF_PWR Detects availability of local self power source Bus Power Low Self local power source is NOT available i e Hub Detect gets all power from Upstream USB VBus High Self local power source is available TEST Pin TEST IPD Used for testing the chip User must treat as a no connect or connect to ground SMSC USB2502 13 DATASHEET Revision 2 3 08 27 07 SMSC Table 4 3 Miscellaneous Pins continued 2 Port USB 2 0 Hub Controller Datasheet
11. asserted P Upstream 4 N levels EN N M I 1 1 1 11 ELM 15 EM M 6 gt 7 gt 1 8 l t2 l l 1 RESET_N l l l eyi I P 1 1 4 VSS ir 1 i 4 i i i i rH I Strap Pins l Don t Care Driven by Hub if strap is an output VSS A 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 11 RESET_N Asserted 1 usec 12 Strap Setup Time 16 7 nsec t3 Strap Hold Time 16 7 1400 nsec t4 hub outputs driven to inactive logic states 2 0 1 5 usec 15 USB Attach See Note 100 msec SMSC USB2502 Revision 2 3 08 27 07 33 DATASHEET SMSC 2 Port USB 2 0 Hub Controller Datasheet Table 5 5 Reset_N Timing for Default Strap Option Mode continued NAME DESCRIPTION MIN TYP MAX UNITS 16 Host acknowledges attach and signals USB 100 msec Reset t7 USB Idle undefined msec 18 Completion time for requests with or without data 5 msec stage Notes a When in Bus Powered mode the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during 11 45 All Power Supplies must have reached the operating levels mandated in Section
12. 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 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 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 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 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 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 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
13. 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 OmA in its descriptors USB 2 0 Specification does not permit this value to exceed 100m 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 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 OmA 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 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 does NOT include the power consumption of a permanently a
14. 0 3 2 2 2 0424 2502 0424 2502 Vendor ID assigned by USB IF Product ID assigned by Manufacturer DID SMSC USB2502 5 4 0000 19 DATASHEET 0000 Device ID assigned by Manufacturer Revision 2 3 08 27 07 SMSC 2 Port USB 2 0 Hub Controller Datasheet Table 5 1 User Defined Descriptor Data continued DEFAULT DEFAULT BYTE CFG CFG MSB SIZE SELF BUS FIELD LSB BYTES HEX HEX DESCRIPTION Config Data 6 1 88 0C Configuration data byte 1 for Hub options Byte 1 Config Data 7 1 90 90 Configuration data byte 42 for Hub options Byte 2 Non 8 1 00 00 Defines the ports that contain attached Removable devices this is used only when Hub is part of Device a compound device Port Disable 9 1 00 00 Selects the ports that will be permanently Self Powered disabled Port Disable A 1 00 00 Selects the ports that will be permanently Bus Powered disabled Max Power B 1 01 01 Max Current for this configuration expressed Self Powered in 2mA units Max Power C 1 64 64 Max Current for this configuration expressed Bus Powered in 2 units Hub Controller D 1 01 01 Max Current expressed in 2mA units Max Current Self Powered Hub Controller E 1 64 64 Max Current expressed in 2mA units Max Current Bus Powered Power On F 1 32 32 Time until power is stable Time 5 2 3 1 EEPROM Offse
15. 2 Specification for details on 2 bus protocols The Hub s 12C EEPROM interface is designed to attach to a single dedicated 2 EEPROM and it conforms to the Standard mode 2 Specification 100kbit s transfer rate and 7 bit addressing for protocol and electrical compatibility Note Extensions to the 2 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 Implementation Characteristics Please refer to the MicroChip 24AA00 DataSheet for Protocol and Programming specifics Pull Up Resistor The Circuit board designer is required to place external pull up resistors 10KQ recommended on the SDA SMBDATA amp SCL SMBCLK CFG_SELO lines per SMBus 1 0 Specification and EEPROM manufacturer guidelines to Vcc in order to assure proper operation 2 EEPROM Slave Address Slave address is 1010000 Note 10 bit addressing is NOT supported 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 EEPROM DATA Table 5 1 User Defined Descriptor Data FIELD BYTE MSB LSB SIZE BYTES DEFAULT CFG SELF HEX DEFAULT CFG BUS HEX DESCRIPTION VID PID 1
16. 3 9 5 Register 04h Product ID MSB Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 PID_MSB Most Significant Byte of the Product ID 5 3 9 6 Register 05h Device ID LSB Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 DID_LSB Least Significant Byte of the Device ID 5 3 9 7 Register 06h Device ID MSB Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 DID_MSB Most Significant Byte of the Device ID 5 3 9 8 Register 07h CONFIG_BYTE_1 Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 SELF BUS PWR 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 pin is used to determine if the hub is operating from self or bus power 6 Reserved Reserved Revision 2 3 08 27 07 28 SMSC USB2502 DATASHEET 2 Port USB 2 0 Hub Controller SMSC Datasheet BIT NUMBER BIT NAME DESCRIPTION 5 HS DISABLE High Speed Disable Disables the capability to attach as either a High Full speed device and forces attachment as Full speed only i e no High Speed support 0 High Full Speed 1 Full Speed Only High Speed disabled 4 Reserved Reserved 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
17. 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 Ty meour min Devices that have detected this condition must reset their communication and be able to receive a new START condition no later than 35ms TriMEOUT 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 BIT 7 BITO ADDR R W REGISTER NAME ABBR MSB BIT6 BIT5 BIT 4 BIT3 BIT2 BIT 1 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
18. Ack Stop 1 7 1 1 8 1 8 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 Wr Ack Reg Ack Start Slave Rd Ack Reg Nack Stop Addr Addr Addr Data Bits 7 1 1 8 1 1 7 1 1 8 1 1 5 3 2 5 3 3 SMSC USB2502 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 General Call Address Response The Hub does not respond to a general call address of 0000_000b Revision 2 3 08 27 07 25 DATASHEET SMSC 2 Port USB 2 0 Hub Controller Datasheet 5 3 4 Slave Device Time Out
19. Chapter 7 DC Parameters prior to or coincident with the assertion of RESET 5 6 1 2 RESET N for EEPROM Configuration Read Strap Mead EEPROM ps USB Reset Idle completion asserted Options Set Gps Ton YON NON l 4 t1 gt 12 presi peris t7 i i i RESET l 1 A I VSS rr 7 7 7 1 Figure 5 3 Reset N Timing for EEPROM Mode Table 5 6 Reset N Timing for EEPROM Mode NAME DESCRIPTION MIN TYP MAX UNITS t RESET N Asserted 1 usec t2 Hub Recovery Stabilization 500 usec t3 EEPROM Read Hub Config 2 0 99 5 msec t4 USB Attach See Note 100 msec t5 Host acknowledges attach and signals USB 100 msec Reset t6 USB Idle undefined msec t7 Completion time for requests with or without data 5 msec stage Revision 2 3 08 27 07 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 14 t5 t6 t7 34 DATASHEET SMSC USB2502 2 Port USB 2 0 Hub Controller SMSC a All Power Supplies must have reached the operating levels mandated in Section Chapter 7 DC Parameters prior to or coincident with the assertion of RESET_N Datasheet 5 6 1 3 RESET_N for SMBus Slave Configuration Hardware Attach Siar Reset SMBus Code Hub PHY USB Reset completion reset 5 USB Idle Negation Lo
20. HAUPPAUGE NY 11788 631 435 6000 FAX 631 273 3123 Copyright 2007 SMSC or its subsidiaries All rights reserved Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications Consequently complete information sufficient for construction purposes is not necessarily given Although the information has been checked and is believed to be accurate no responsibility is assumed for inaccuracies SMSC reserves the right to make changes to specifications and product descriptions at any time without notice Contact your local SMSC sales office to obtain the latest specifications before placing your product order The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC s standard Terms of Sale Agreement dated before the date of your order the Terms of Sale Agreement The product may contain design defects or errors known as anomalies which may cause the product s functions to deviate from published specifications Anomaly sheets are available upon request SMSC products are not designed intended authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injur
21. Length 0 50 Basic 0 17 998 7 5 098 7 79 Lead Pitch Lead Foot Angle Lead Width Lead Shoulder Radius Lead Foot Radius ee 08 Coplanariy Notes 1 Controlling Unit millimeter 2 Tolerance on the true position of the leads is 0 04 mm maximum 3 Package body dimensions D1 and E1 do not include the mold protrusion Maximum mold protrusion is 0 25 mm 4 Dimension for foot length L measured at the gauge plane 0 25 mm above the seating plane 5 Details of pin 1 identifier are optional but must be located within the zone indicated Revision 2 3 08 27 07 44 DATASHEET SMSC USB2502
22. OTTOM VIEW UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN MILLIMETERS AND TOLERANCES ARE DECIMAL ANGULAR DIM AND TOL PER ASME Y14 5M 1994 SATE b APPLIES TO PLATED TERMINALS AND IT IS MEASURED BETWEEN 0 15 AND 0 30 mm FROM THE AK 12 6 04 TERMINAL TIP 02 E2 VARIATIONS 80 ARKAY DRIVE HAUPPAUGE NY 11788 USA 36 TERMINAL QFN 6x6mm BODY 0 5mm PITCH NOTE CATALOG PART ee SMST SUCCESS BY DESIGN PACKAGE OUTLINE DETAILS OF TERMINAL 1 IDENTIFIER ARE OPTIONAL BUT MUST BE LOCATED WITHIN THE AREA INDICATED 5 12 6 04 COPLANARITY ZONE APPLIES EXPOSED PAD AND TERMINALS Dwa NuMBER MO 36 QFN 6x6 RE F PRINT WITH SCALE TO FIT DO NOT SCALE DRAWING 5 12 6 04 Figure 9 1 36 Pin QFN Package COMPLIANCE JEDEC MO 220 Jeousejeq JejoJuo 072 951 HOd z SMSE 2 Port USB 2 0 Hub Controller Datasheet BBRBRBBRRRR i RRRERHRRRRR d HEHBHBHEBEHBH T Figure 9 2 48 Pin Package Outline 7x7x1 4 mm body 2mm Footprint Table 9 1 48 Pin Package m Overall Package Height 0 15 Standoff 0 05 1 35 RUNE ME m 1 45 920 Body Thickness X Span X body 575 2 Y body Size 0 09 0 20 Lead Frame Thickness 0 45 0 75 Lead Foot Length es Lead
23. Port USB 2 0 Hub Controller smsc Datasheet 5 3 9 14 Register 0 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 OmA in its descriptors A value of 50 decimal indicates 100mA 5 3 9 15 Register OEh Hub Coniroller 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 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 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 OFh Hub Control
24. S 1 IS Type Input Buffer Low Input Level 0 8 V TTL Levels High Input Level 2 0 V Input Leakage li a uS Vin 0 to Vppa3 CR Vuvsi 250 300 350 mV Hysteresis IS Only Input Buffer with Pull Up IPU Low Input Level 0 8 M TTL Levels High Input Level 20 45 uA Low Input Leakage p n Vin 0 10 10 uA High Input Leakage Vin Input Buffer with Pull Down IPD Low Input Level 0 8 V TTL Levels High Input Level a V 10 10 uA Low Input Leakage us Vin 0 80 160 uA High Input Leakage Vin SMSC USB2502 39 DATASHEET Revision 2 3 08 27 07 SMSC 2 Port USB 2 0 Hub Controller Datasheet Table 7 1 DC Electrical Characteristics continued PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS ICLK Input Buffer Low Input Level ViLCK 0 8 V TTL Levels High Input Level 2 0 v Input Leakage I od Mis us Vin 0 to Vppa3 CR Vuvsc 50 100 mV Hysteresis O8 and 8 Type Buffer Low Output Level VoL 0 4 V Io 8 MA Vppg3CR 3 3V High Output Level VoH Em V 1 Io 4mA 3 3V Output Leakage 10 10 or d 010 Vpp33CR Note 1 05012 Type Buffer Low Output Level VoL 0 4 V lo 12 mA 3 3V Output Leakage lo 10 10 HA Vin 0 to Vpp33CR Note 1 Hysteresis 250 300 350 IO U Note 2 I R Note 3 Supply Current Unconfig ured Hi
25. SmS SUCCESS BY DESIGN PRODUCT FEATURES USB2502 fa USB 2 Port USB 2 0 Hub Controller Datasheet Integrated USB 2 0 Compatible 2 Port Hub High Speed 480Mbits s Full Speed 12Mbits s and Low Speed 1 5Mbits s compatible Full power management with ganged power control Detects Bus Power Self Power source and changes mode automatically Complete USB Specification 2 0 Compatibility Includes USB 2 0 Transceivers a VID PID DID and Port Configuration for Hub via Single Serial C EEPROM SMBus Slave Port Default VID PID DID allows functionality when configuration EEPROM is absent Hardware Strapping options allow for configuration without an external EEPROM or SMBus Host On Board 24MHz Crystal Driver Circuit or 24 MHz external clock driver Internal PLL for 480MHz USB 2 0 Sampling Internal 1 8V Linear Voltage Regulator Integrated USB termination and Pull up Pull down resistors Internal Short Circuit protection of USB differential signal pins Basic single color LED support 1 8 Volt Low Power Core Operation 3 3 Volt I O with 5V Input Tolerance 36 Pin QFN or 48 Pin TQFP lead free RoHS compliant package SMSC USB2502 DATASHEET Revision 2 3 08 27 07 2 Port USB 2 0 Hub Controller SMSE Datasheet ORDER NUMBERS USB2502 AEZG FOR 36 PIN LEAD FREE ROHS COMPLIANT QFN PACKAGE USB2502 HT FOR 48 PIN LEAD FREE ROHS COMPLIANT TQFP PACKAGE smsc 80 ARKAY DRIVE
26. ad Stabilization recovery request asserted Upstream 405 YN NY YN OY l 14 1 2 gt 1 3 gt gt 5 6 la 7 RESET 4 VSS TM l Figure 5 4 Reset_N Timing for SMBus Mode Table 5 7 Reset_N Timing for SMBus Mode NAME DESCRIPTION MIN TYP MAX UNITS ti RESET_N Asserted 1 usec t2 Hub Recovery Stabilization 500 usec t3 SMBus Code Load See Note 10 99 5 msec t4 Hub Configuration and USB Attach 100 msec t5 Host acknowledges attach and signals USB 100 msec Reset t6 USB Idle Undefined msec t7 Completion time for requests with or without data 5 msec stage Notes a For Bus Powered configurations the 99 5ms MAX is required and the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t2 t3 t4 t5 t6 t7 For Self Powered configurations t3 MAX is not applicable and the time to load the configuration is determined by the external SMBus host All Power Supplies must have reached the operating levels mandated in Section Chapter 7 DC Parameters prior to or coincident with the assertion of RESET_N SMSC USB2502 Revision 2 3 08 27 07 35 DATASHEET 2 Port USB 2 0 Hub Controller smsc MM 5 6 2 USB Bus Reset In response to the upstream port signaling a reset to the Hub the Hub does the following Note The Hub does not propagate the upstream USB rese
27. e hub is configured by the internal default configuration Removable these pins will be sampled at the rising edge of RESET_N see the applicable RESET_N timing table in Section 5 6 1 to determine if ports 2 1 contain permanently attached non removable devices Also the active state of the LED s will be determined as follows strapping option NON RENM 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 RENM 1 0 10 Ports 1 amp 2 are non removable GR2 is active low GR1 is active high NON RENM 1 0 11 Ports 1 4 2 are non removable GR2 is active low GR1 is active low Port Power PRTPWR POL 1 08 Port Power Polarity strapping determination for the active Polarity strapping signal polarity of the PRTPWR pin While RESET_N is asserted the logic state of this pin will though the use of internal combinatorial logic determine the active state of the PRTPWR pin in order to ensure that downstream port power is not inadvertently enabled to inactive ports during a hardware reset On the rising edge of RESET N see the applicable RESET N timing table in Section 5 6 1 the logic value will be latched internally and will retain the active signal polarity for the PRTPWR pin 1 PRTPWR pin has an active high polarity 0 PRTPWR has an active low pola
28. e not available to be enabled or enumerated by a Host Controller The disabled ports must be in decreasing order starting with port 2 This field is set by the OEM using either the SMBus or EEPROM interface options Bus Powered Port DISABLE During Bus Powered operation this selects the ports which will be permanently disabled and are not available to be enabled or enumerated by a Host Controller The disabled ports must be in decreasing order starting with port 2 This field is set by the OEM using either the SMBus or EEPROM interface options Dynamic Power Controls the ability of the 2 Port Hub to automatically change from Self Powered operation to Bus Powered operation if the local power source is removed or is unavailable and from Bus Powered to Self Powered if the local power source is restored Note If the local power source is available the 2 port Hub will always switch to Self Powered operation Revision 2 3 08 27 07 17 DATASHEET SMSC 5 1 1 13 5 1 1 14 5 1 1 15 5 1 1 16 5 1 1 17 5 1 1 18 5 1 1 19 Revision 2 3 08 27 07 2 Port USB 2 0 Hub Controller Datasheet When Dynamic Power switching is enabled the Hub detects the availability of a local power source by monitoring the external SELF 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
29. eak Internal pull down IPU Input with a weak Internal pull up IS Input with Schmitt trigger 1 08 Input Output 8mA O8 Output 8mA Revision 2 3 08 27 07 14 DATASHEET SMSC USB2502 2 Port USB 2 0 Hub Controller SMSC Datasheet Table 4 5 Buffer Type Descriptions continued BUFFER DESCRIPTION 105012 Open drain 12mA sink with Schmitt trigger and must meet 2 Specification Version 2 1 requirements ICLKx XTAL Clock Input OCLKx XTAL Clock Output I R RBIAS 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 AlO Analog Input output Per PHY test requirements SMSC USB2502 Revision 2 3 08 27 07 15 DATASHEET SMSC 2 Port USB 2 0 Hub Controller Datasheet Chapter 5 Functional Block Description 5 1 5 1 1 1 5 1 1 2 5 1 1 3 5 1 1 4 Revision 2 3 08 27 07 2 Port Hub SMSC s USB 2 0 2 Port Hub is fully specification compliant to the Universal Serial Bus Specification Revision 2 0 April 27 2000 12 7 2000 and 5 28 2002 Errata Please reference Chapter 11 Hub Specification for general details regarding Hub operation and functionality For performance reasons the 2 Port Hub provides 1 Transaction Translator TT per port defined as Multi TT configuration divided into 4 non periodic buffers per TT Hub Configu
30. ent resets that the Hub experiences One is a hardware reset via the RESET_N pin and the second is a USB Bus Reset Revision 2 3 08 27 07 SMSC USB2502 32 DATASHEET 2 Port USB 2 0 Hub Controller SMSC Datasheet 5 6 1 External Hardware RESET_N A valid hardware reset is defined as assertion of RESET_N for a minimum of 1us after all power supplies are within operating range While reset is asserted the Hub and its associated external circuitry consumes less than 500nA of current from the upstream USB power source 300uA for the Hub and 200 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 The PHYs are disabled and the differential pairs will be in high impedance state transactions immediately terminate no states are saved All internal registers return to the default state in most cases 00 The external crystal oscillator is halted The PLL is halted SM d y qe LED indicators are disabled The Hub is operational 500us after RESET N is negated Once operational the Hub immediately reads OEM specific data from the external EEPROM if the SMBus option is not disabled 5 6 1 1 RESET N for Strapping Option Configuration Drive Strap Start Attach Hardware Read Strap Outputs to USB Reset completion reset Options inactive USB recover request
31. et Timing for EEPROM 34 Reset Timing for SMBus 35 DC Electrical 39 48 Pin TQFP Package cd esee ek etes debi Ac eger A Rr y Rx A a 44 4 SMSC USB2502 DATASHEET 2 Port USB 2 0 Hub Controller Datasheet List of Figure 3 1 Figure 3 2 Figure 4 1 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 9 1 Figure 9 2 SMSC USB2502 Figures 2 Port 36 Pin QFN 2 sesh ee rub Rae ee ee ee ER ee 9 2 48 TQFP eee ee wae Med ed Ge Reus t ee Bk 10 2 Port Block Diagram esc Ge ee adds Rene rs 11 LED Strapping Option eal e Ro Dn GRE ee ee 32 Reset Timing for Default Strap Option 33 Reset Timing for EEPROM 34 Reset Timing for SMBus 35 36 Pin QFN Package sec dois re asc oret rex ee RR Lac cs 43 48 Pin TQFP Package Outline 7x7x1 4 mm body 2mm Footprint 44 5 Revision 2 3 08 27 07 DATASHEET 2 Port USB 2 0 Hub Controller SMSE Chapter 1 General Description Datasheet The SMSC 2 Port Hub is fully compliant with the USB 2 0 Specificati
32. face The SMBus interface shares the same pins as the EEPROM interface if CFG_SEL1 amp CFG_SELO activates the SMBus interface external EEPROM support is no longer available and the user defined descriptor data must be downloaded via the SMBus Due to system issues the SMSC Hub waits indefinitely for the SMBus code load to complete and only appears as a newly connected device on USB after the code load is complete The Hub s SMBus implementation is a subset of the SMBus interface to the host The device is a slave only SMBus device The implementation in the device is a subset of SMBus since it only supports two protocols The Write Byte and Read Byte protocols are the only valid SMBus protocols for the Hub The Hub responds to other protocols as described in Section 5 3 2 Invalid Protocol Response Behavior on page 25 Reference the System Management Bus Specification Rev 1 0 The SMBus interface is used to read and write the registers in the device The register set is shown in Section 5 3 9 Internal SMBus Memory Register Set on page 26 5 3 1 Bus Protocols Typical Write Byte and Read Byte protocols are shown below Register accesses are performed using 7 bit slave addressing an 8 bit register address field and an 8 bit data field The shading indicates the Hub driving data on the SMBDATA line otherwise host data is on the SDA SMBDATA line The slave address is the unique SMBus Interface Address for the Hub that identi
33. fies it on SMBus The register address field is the internal address of the register to be accessed The register data field is the data that the host is attempting to write to the register or the contents of the register that the host is attempting to read Note Data bytes are transferred MSB first msb first Revision 2 3 08 27 07 SMSC USB2502 24 DATASHEET 2 Port USB 2 0 Hub Controller Datasheet 5 3 1 1 Field Bits SMSC 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 Start Slave Addr Wr Ack Reg Addr Ack Reg Data
34. figuration please see for specific details on how to enable default configuration Please refer to Table 5 1 on page 19 for the internal default values that are loaded when this option is selected 5 5 Default Strapping Options The SMSC Hub can be configured via a combination of internal default values and pin strap options Please see Table 4 1 7 Port Hub Pin Descriptions for specific details on how to enable the default pin strap configuration option The strapping option pins only cover a limited sub set of the configuration options The internal default values will be used for the bits amp registers that are not controlled by a strapping option pin Please refer to Table 5 1 on page 19 for the internal default values that are loaded when this option is selected The Green LED pins are sampled after RESET negation and the logic values are used to configure the hub if the internal default configuration mode is selected The implementation shown below see Figure 5 1 shows a recommended passive scheme When a pin is configured with a Strap High configuration the LED functions with active low signalling and the PAD will sink the current from the external supply When a pin is configured with a Strap Low configuration the LED functions with active high signalling and the PAD will source the current to the external LED V Strap High Strap Low Figure 5 1 LED Strapping Option 5 6 Reset There are two differ
35. for 48 TQFP 2 Port USB 2 0 Hub Controller Datasheet UPSTREAM USB 2 0 INTERFACE 3 PINS USBDPO USBDNO VBUS DET 2 PORT USB 2 0 INTERFACE 10 PINS USBDP1 USBDN1 USBDP2 USBDN2 GR1 GR2 PRTPWR POL RBIAS NON REMO NON PRTPWR OCS N SERIAL PORT INTERFACE 3 PINS SDA SMBDATA SCL SMBCLK CFG SEL1 CFG SELO MISC 7 PINS XTAL1 CLKIN XTAL2 RESET_N SELF_PWR ATEST CLKIN_EN TEST REG_EN POWER GROUND AND NO CONNECT 25 PINS Revision 2 3 08 27 07 8 DATASHEET SMSC USB2502 2 Port USB 2 0 Hub Controller Datasheet er sms Chapter 3 Pin Configuration 2 Port Hub e N 5 LL S a 25 gt 2 0m E gt D o up 2 10 0 A lt gt gt gt mu mm pm mm mm mum mm mm mm VDD33CR VSS XTAL2 7 XTAL1 CLKIN gt i f NR VDDA18PLL gt 32 USB2502 14 guj PRTPWR VDDA33PLL View 36 13 PRTPWR POL ATEST REG EN 34 42 Cg GR2 NON REM1 i Thermal Slug RBIAS gt 35 must be connected to VSS 11 GR1 NON_REMO vss 36 55 cO O USBDP2 USBDN2 17 o T Z o Q aad m m oma wn nn a gt 5 5 gt VDDA33 3 Indicates pins on the bottom of the device Figure 3 1
36. ganged 00 Ganged sensing all ports together 01 Reserved1x Over current sensing not supported must only be used with Bus Powered configurations 0 Reserved Reserved 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 Bus Powered 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 Reserved 5 4 OC TIMER 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 Reserved SMSC USB2502 Revision 2 3 08 27 07 29 DATASHEET SMSC 2 Port USB 2 0 Hub Controller Datasheet 5 3 9 10 Register 09h Non Removable Device Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 NR_DEVICE Non Removable Device Indicates which port s include non removable devic es 0 port is removable 1 port is non removable Bit 7 3 Reserved always 0 Bit 2 1 Port 2 non removable Bit 1 1 Port 1 non removable Bit 0 is Reserved always 0 5 3 9 11 Register OAh Port Disab
37. gh Speed Host ICCINIT 73 mA Full Speed Host 65 Supply Current Total from all supplies Configured High Speed Host 2 Ports FS LS 2 120 MA lucHe 170 mA 2 Ports HS 140 1 Port HS 1 Port FS LS Supply Current Total from all supplies Configured Full Speed Host mA 1 Port 90 2 Ports 2 90 Revision 2 3 08 27 07 40 DATASHEET SMSC USB2502 2 Port USB 2 0 Hub Controller SMSC Datasheet Table 7 1 DC Electrical Characteristics continued PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS Supply Current lcsgv 320 425 uA Total from all supplies Suspend Supply Current InsT 160 300 uA Total from all supplies Reset 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 T 25 fc 1MHz 3 3V LIMITS PARAMETER SYMBOL MIN MAX UNIT TEST CONDITION Clock Input Cin 12 pF All pins except USB pins and pins under Capacitance test tied to AC ground Input Capacitance Cin 8 pF Output Capacitance 12 Power Sequencing There are no power supply sequence restrictions for the Hub The order in which power supplies power up and power down is implementation dependent SMSC USB2502 41
38. 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 Current Sensing Selects current sensing as all ports ganged or none This field can be set by the OEM using either the SMBus or EEPROM interface options When using the internal default option the SELF_PWR pin determines if current sensing will be ganged or none ganged if self powered none if bus powered 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 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 non removable Self Powered Port DISABLE During Self Powered operation this selects the ports which will be permanently disabled and ar
39. le For Self Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 PORT_DIS_SP Port Disable Self Powered Disables 1 or more contiguous ports 0 port is available 1 port is disabled Bit 7 3 0 ReserveaBit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit 0 is Reserved always 0 5 3 9 12 Register OBh Port Disable For Bus Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 PORT_DIS_BP Port Disable Bus Powered Disables 1 or more contiguous ports 0 port is available 1 port is disabled Bit 7 3 0 ReservedBit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit 0 is Reserved always 0 5 3 9 13 Register OCh Max Power For Self Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 MAX_PWR_SP Max Power Self_Powered Value in 2mA increments that the Hub consumes from an upstream port VBUS when operating as a self powered hub This value includes the hub silicon along with the combined power consumption from VBUS of all associated circuitry on the board This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device and the embedded peripheral reports OmA in its descriptors Note The USB 2 0 Specification does not permit this value to exceed 100mA A value of 50 decimal indicates 100mA Revision 2 3 08 27 07 30 SMSC USB2502 DATASHEET 2
40. ler Max Current For Bus Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 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 bus powered hub This value will include the hub silicon along with the combined power consumption from VBUS of all associated circuitry on the board This value will NOT include the power consumption of a permanently attached peripheral if the hub is configured as a compound device A value of 50 decimal would indicate 100mA which is the default value 5 3 9 17 Register 10h Power On Time Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 POWER ON TIME Power On Time The length of time that it takes in 2 ms intervals from the time the host initiated power on sequence begins on a port until power is good on that port 5 3 9 18 Undefined Registers The registers shown in Table 5 4 are the defined registers in the Hub Reads to undefined registers return 00h Writes to undefined registers have no effect and do not return an error SMSC USB2502 Revision 2 3 08 27 07 31 DATASHEET 2 Port USB 2 0 Hub Controller er Sms 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 con
41. nfigured 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 100 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 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 16 SMSC USB2502 DATASHEET 2 Port USB 2 0 Hub Controller Datasheet 5 1 1 5 5 1 1 6 5 1 1 7 5 1 1 8 5 1 1 9 5 1 1 10 5 1 1 11 5 1 1 12 SMSC USB2502 SMSC 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 EOP Disable During FS operation only this permits the Hub to send EOP if no downstream traffic
42. oltage on 0 3 4 0 V XTAL1 Voltage on 0 3 Vppig 0 3V V XTAL2 Note Stresses above the specified parameters could cause permanent damage to the device This is a stress rating only and functional operation of the device at any condition above those indicated in the operation sections of this specification is not implied When powering this device from laboratory or system power supplies it is important that the Absolute Maximum Ratings not be exceeded or device failure can result Some power supplies exhibit voltage spikes on their outputs when the AC power is switched on or off In addition voltage transients on the AC power line may appear on the DC output When this possibility exists it is suggested that a clamp circuit be used Revision 2 3 08 27 07 SMSC USB2502 38 DATASHEET 2 Port USB 2 0 Hub Controller SMSC Datasheet 7 2 Recommended Operating Conditions PARAMETER SYMBOL MIN MAX UNITS COMMENTS Operating 0 70 1 8V supply voltage VDDA18PLL 1 62 1 98 V DD18 3 3V supply voltage VppA33 3 0 3 6 V VDDA33PLL VppaacR Voltage on any pin 0 3 5 5 V If any 3 3V supply voltage drops below 3 0V then the MAX becomes 3 3V supply voltage 0 5 Voltage on XTAL1 0 3 VppA33 Voltage on XTAL2 0 3 Vpp1a Table 7 1 DC Electrical Characteristics PARAMETER SYMBOL MIN MAX UNITS COMMENT
43. on and will attach to a USB host as a Full Speed Hub or as a Full High Speed Hub The 2 Port Hub supports Low Speed Full Speed and High Speed if operating as a High Speed Hub downstream devices on all of the enabled downstream ports The Hub works with an external USB power distribution switch device to control 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 pins and all required pull down and pull up resistors on D and pins The over current sense inputs for the downstream facing ports have internal pull up resistors Throughout this document the upstream facing port of the hub will be referred to as the upstream port and the downstream facing ports will be called the downstream ports 1 1 OEM Selectable Features A default configuration is available in the USB2502 following a reset This configuration may be sufficient for some applications Strapping option pins make it possible to modify a limited sub set of the configuration options The USB2502 may also be configured by an external EEPROM or a microcontroller When using the microcontroller interface the Hub appears as an SMBus slave device If the Hub is pin strapped for external EEPROM configuration but no external EEPROM is present then a value of 0 will be written to all configuration data bi
44. ons NAME SYMBOL TYPE FUNCTION UPSTREAM USB 2 0 INTERFACE VBUS Power SMSC USB2502 USB Bus Data USBDNO These pins connect the upstream USB bus data signals USBDPO Detect Upstream VBUS_DET 1 08 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 11 Revision 2 3 08 27 07 DATASHEET 2 Port USB 2 0 Hub Controller SMSC Datasheet Table 4 1 2 Port Hub Pin Descriptions continued NAME SYMBOL TYPE FUNCTION 2 PORT USB 2 0 HUB INTERFACE High Speed USB USBDN 2 1 IO U These pins connect to the downstream USB peripheral Data USBDP 2 1 devices attached to the Hub s ports p E PRTPWR O8 Enables power to USB peripheral devices downstream nable The active signal level of the PRTPWR pin is determined by the Power Polarity Strapping function of the PRTPWR POL pin Port 2 1 Green GR 2 1 1 08 Green indicator LED for ports 2 and 1 Will be active low LED NON_REM 1 0 when LED support is enabled via EEPROM or SMBus amp Port Non If th
45. ownstream directed traffic is in progress 0 EOP generation at EOF1 is enabled 1 EOP generation at EOF1 is disabled normal operation Default 2 1 CURRENT SNS Over Current Sense Indicates whether current sensing is ganged 00 Ganged sensing all ports together Default for self power 01 Reserved 1x Over current sensing not supported may be used with Bus Powered configurations only and is the default for bus power 0 Reserved Reserved 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 Bus Powered 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 Reserved SMSC USB2502 21 Revision 2 3 08 27 07 DATASHEET SMSC 2 Port USB 2 0 Hub Controller Datasheet BIT NUMBER BIT NAME DESCRIPTION 5 4 OC_TIMER OverCurrent Timer Over Current Timer delay 00 0 1ms 01 2ms Default 10 4ms 11 2 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 Reserved 5 2 3 6 EEPROM Offset 8 h Non Removable Device BIT NUMBER BIT NAME DESCRIPTION 7 0 NR DEVICE Non Removable
46. ration Options The SMSC Hub supports a large number of features and must be configured in order to correctly function when attached to a USB host controller There are three principal ways to configure the hub SMBus EEPROM or by internal default settings In all cases the configuration method will be determined by the CFG_SEL1 and CFG_SELO pins immediately after RESET_N negation 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 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 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 Self Powered Bus Powered The Hub is either Self Powered draws less than 2mA of upstream bus power or Bus Powered limited to 100mA maximum of upstream power prior to being configured by the host controller When co
47. rity Over Current OCS N IPU Input from external current monitor indicating an over Sense current condition Note Contains internal pull up to 3 3V supply USB Transceiver RBIAS I R A 12 0kQ 1 resistor is attached from ground to this Bias pin to set the transceiver s internal bias settings Revision 2 3 08 27 07 SMSC USB2502 12 DATASHEET 2 Port USB 2 0 Hub Controller SMSC Datasheet Table 4 1 2 Port Hub Pin Descriptions continued NAME SYMBOL TYPE FUNCTION SERIAL PORT INTERFACE Serial Data SMB SDA SMBDATA 105012 Serial Data SMB Data signal Data Serial Clock SMB SCL SMBCLK 105012 Serial Clock SMB Clock signal This multifunction is Clock CFG_SELO read on the rising edge of RESET_N see the applicable amp E RESET N timing table in Section 5 6 1 and will determine Config Select 0 the hub configuration method as described in Table 4 2 Configuration CFG SEL1 This pin is read on the rising edge of RESET_N see the Programming applicable RESET_N timing table in Section 5 6 1 and will Select determine the hub configuration method as described in Table 4 2 Table 4 2 SMBus or EEPROM Interface Behavior CFG_SEL1 CFG_SELO SMBus or EEPROM interface behavior 0 0 Reserved 0 1 Configured as an SMBus slave for external download of user defined descriptors SMBus slave address is 0101100 1 0
48. t 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 Revision 2 3 08 27 07 20 SMSC USB2502 DATASHEET 2 Port USB 2 0 Hub Controller SMSC Datasheet 5 2 3 3 EEPROM Offset 5 4 h Device ID BIT NUMBER BIT NAME DESCRIPTION 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 EEPROM Offset 6 h CONFIG_BYTE_1 BIT NUMBER BIT NAME DESCRIPTION 7 SELF BUS PWR 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 pin is used to determine if the hub is operating from self or bus power 6 Reserved Reserved 5 HS DISABLE High Speed Disable Disables the capability to attach as either a High Full speed device and forces attachment as Full speed only i e no High Speed support 0 High Full Speed Default 1 Full Speed Only High Speed disabled 4 Reserved Reserved 3 EOP DISABLE EOP Disable Disables EOP generation at EOF1 when no d
49. t 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 amp 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 DESCRIPTION 7 0 VID_LSB Least Significant Byte of the Vendor ID SMSC USB2502 Revision 2 3 08 27 07 27 DATASHEET SMSC 2 Port USB 2 0 Hub Controller Datasheet 5 3 9 3 Register 02h Vendor ID MSB Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 VID_MSB Most Significant Byte of the Vendor ID 5 3 9 4 Register 03h Product ID LSB Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 PID_LSB Least Significant Byte of the Product ID 5
50. t fields the hub will attach to the host with all 0 values The 2 Port Hub supports several OEM selectable features Operation as a Self Powered USB Hub or as a Bus Powered USB Hub Operation as a Dynamic Powered Hub Hub operates as a Bus Powered device if a local power source is not available and switches to Self Powered operation when a local power source is available a Optional OEM configuration via 2 EEPROM or via the industry standard SMBus interface from an external SMBus Host Compound device support port is permanently hardwired to a downstream USB peripheral device Hardware strapping options enable configuration of the following features Non Removable Ports Port Power Polarity active high or active low logic Revision 2 3 08 27 07 SMSC USB2502 6 DATASHEET 2 Port USB 2 0 Hub Controller Datasheet Chapter 2 Pin Table 2 Port SMSC Table 2 1 2 Port Pin Table for 36 QFN UPSTREAM USB 2 0 INTERFACE 3 PINS USBDPO USBDNO VBUS DET 2 PORT USB 2 0 INTERFACE 10 PINS USBDP1 USBDN1 USBDP2 USBDN2 GR1 GR2 PRTPWR POL RBIAS NON REMO NON PRTPWR OCS N SERIAL PORT INTERFACE 3 PINS SDA SMBDATA SCL SMBCLK CFG SEL1 CFG SELO MISC 7 PINS XTAL1 CLKIN XTAL2 RESET_N SELF_PWR ATEST CLKIN_EN TEST REG_EN POWER GROUND 13 PINS SMSC USB2502 7 DATASHEET Revision 2 3 08 27 07 SMSE Table 2 2 2 Port Pin Table
51. t to downstream devices 1 Sets default address to 0 Sets configuration to Unconfigured Negates PRTPWR to all downstream ports Clears all TT buffers Moves device from suspended to active if suspended oD 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 SMSC USB2502 36 DATASHEET 2 Port USB 2 0 Hub Controller smsc Datasheet Chapter 6 XNOR Test XNOR continuity tests all signal pins on the Hub every pin except for NC XTAL1 CLKIN XTAL2 ATEST REG_EN RBIAS TEST Power and Ground This functionality is enabled by driving TEST and CFG SEL 1 high driving SCLK low and transition RESET_N from low to high The output from the XNOR chain is driven to GR2 For each pin tested for continuity GR2 should toggle SMSC USB2502 Revision 2 3 08 27 07 37 DATASHEET 2 Port USB 2 0 Hub Controller er SmS Datasheet Chapter 7 DC Parameters 7 1 Maximum Guaranteed Ratings PARAMETER SYMBOL MIN MAX UNITS COMMENTS Storage 55 150 Lead 325 C Soldering lt 10 seconds Temperature 1 8V supply VDDA18PLL 0 3 2 5 V voltage 1 3 3V supply Vppa33 0 3 4 0 V voltage VpDA33PLL VDD33CR Voltage on any 0 3 3 3V supply voltage 2 lt 6 V pin V
52. ttached peripheral if the hub is configured as a compound device AR USB 2 0 Specification does not permit this value to exceed 100m A value of 50 decimal indicates 100mA which is the default value SMSC USB2502 Revision 2 3 08 27 07 23 DATASHEET 2 Port USB 2 0 Hub Controller SMSC 5 2 3 12 EEPROM Offset E h Hub Controller Max Current For Bus Powered Operation Datasheet 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 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 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 inter
53. y or severe property damage Any and all such uses without prior written approval of an Officer of SMSC and further testing and or modification will be fully at the risk of the customer Copies of this document or other SMSC literature as well as the Terms of Sale Agreement may be obtained by visiting SMSC s website at http www smsc com SMSC is a registered trademark of Standard Microsystems Corporation SMSC Product names and company names are the trademarks of their respective holders SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE TITLE AND AGAINST INFRINGEMENT AND THE LIKE AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT INCIDENTAL INDIRECT SPECIAL PUNITIVE OR CONSEQUENTIAL DAMAGES OR FOR LOST DATA PROFITS SAVINGS OR REVENUES OF ANY KIND REGARDLESS OF THE FORM OF ACTION WHETHER BASED ON CONTRACT TORT NEGLIGENCE OF SMSC OR OTHERS STRICT LIABILITY BREACH OF WARRANTY OR OTHERWISE WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Revision 2 3 08 27 07 SMSC USB2502 2 DATASHEET 2 Port USB 2 0 Hub Controller Datasheet Table of Contents Chapter 1 General

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