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SMSC USB2503 User's Manual

1. 6 1 1 OEM Selectable Features cette eee 6 Chapter 2 Pin Table 3 Port omosorisorar carr AAA 7 Chapter 3 Pin Configuration 3 Port Hub 0 ean 8 Chapter 4 3 Port Hub Block Diagram 9 Chapter 5 Functional Block Description 14 9 1 3 PONHUD ses ta ect a PENA ARALAN ed eee da Pave aie ae AAA beds 14 5 1 1 Hub Configuration Options tee 14 5 1 2 VBuS Detect sesu tad aada AA ad eed be oon ae eee ne R 17 5 2 EEPROM Interface 0000 tenet eens 17 5 2 1 I2C EEPROM ovio as par dae eed NGA NG tas whee eee a eels 17 5 2 2 In Circuit EEPROM Programming n a 0 cece e eee eee ee 18 5 2 3 EEPROM DATA wis cnceedeces cide caer oe dae eee hae Rhee bas dee Bee a Pes 18 5 3 SMBus Slave Interface ete 23 5 3 1 Bus Protocols Ak A N hed ete ies Bee AE 23 5 3 2 Invalid Protocol Response Behavior auaa e eee ete ee 24 5 3 3 General Call Address Response 0 0000 c eee eee eee eee 24 5 3 4 Slave Device Time Out 0 2 0 2 0 0 teens 25 5 3 5 Stretching the SCLK Signal 00 ccc tees 25 5 3 6 SMBUS TIMING eere Gigs ead ci yale Rede gags NA BENDA YA HAPAG hand 25 5 3 7 Bus Reset Sequence 000 ects 25 5 3 8 SMBus Alert Response Address 2 naaa 25 5 3 9 Internal SMBus Memory Register Bet 000 cece eee teens 25 5 4 Default Configuration Option s
2. 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 port by port 1x Over current sensing not supported may be used with Bus Powered configurations only and is the default for bus power 0 PORT_PWR Port Power Switching Indicates whether port power switching is on a port by port basis or ganged 0 Ganged switching all ports together 1 Individual port by port switching 5 2 3 5 EEPROM Offset 7 h CONFIG_BYTE_2 BIT NUMBER BIT NAME DESCRIPTION 7 DYNAMIC Dynamic Power Enable Controls the ability for the Hub to transition to 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 5 4 OC_TIMER OverCurrent Timer Over Current Timer delay 00 0 1ms 01 2ms Default 10 4ms 11 6ms 3 COMPOUND Compound Device Designates if Hub is part of a compound device 0 No Default 1 Yes Hub is part of a compound device 2 0 R
3. Negates PRTPWR 4 1 to all downstream ports Revision 2 3 08 27 07 35 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc 5 Moves device from suspended to active if suspended Datasheet 6 Complies with Section 11 10 of the USB 2 0 Specification for behavior after completion of the reset sequence The Host then configures the Hub and the Hub s downstream port devices in accordance with the USB Specification Revision 2 3 08 27 07 SMSC USB2503 USB2503A 36 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub er o 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 TEST1 Power and Ground This functionality is enabled by driving TEST1 and CFG_SEL 1 high driving SCLK low and transition RESET_N from low to high The output from the XNOR chain is driven to GR2 For each pin tested for continuity GR2 should toggle SMSC USB2503 USB2503A Revision 2 3 08 27 07 37 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub gt SMSC Datasheet Chapter 7 DC Parameters 7 1 Maximum Guaranteed Ratings PARAMETER SYMBOL MIN MAX UNITS COMMENTS Storage Ta 55 150 C Temperature Lead 325 C Soldering lt 10 seconds Temperature 1 8V supply VDDA18PLL 0 5 2 5 V voltage Vpp18 3 3V supply VDDA33 0 5 4 0 V voltage VDDA33PLL VDD33CR Voltage on any 0 5 3 3V supply voltage 2 lt 6 V
4. sasaaa sasaaa aaae 31 5 5 Default Strapping Options 0 00 0 tenes 31 DO lt Ea T ER T cece OE TAS 32 5 6 1 External Hardware RESET N 32 5 6 2 USB Bus Reset 2 35 Chapter o XNOR Test cocinar RR BALA BK DENG KAAWAAN 37 Chapter 7 DC Param lets vas sss s s s lt x e x e e EA 38 7 1 Maximum Guaranteed RatingS 0 000 cece cette eee 38 7 2 Recommended Operating Conditions 0 00 c cette 39 Chapter 8 AC Specifications 42 8 1 Oscillator Clock napaasa esead pas sada ada seed ia APA bade 42 8 1 1 SMBus Interface reia ceansa euna a aaa aa a e AE EEE E eee 42 8 1 2 I2C EEPROM lt sii miada a a a aa LB Ea eee ented an DEAE la adie 42 8 1 3 USB2 Di Sica ee ai it a eee we eee Gute alee bale AP 42 Chapter 9 Package QUiIDC gt ira rr RARAS 43 SMSC USB2503 USB2503A Revision 2 3 08 27 07 3 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Datasheet List of Figures Figure 3 1 3 Port 48 Pin QEN 8 Figure 4 1 3 Port Block Diagram es sg K X KK aden eae dl aaa Dae eden AA NALANG 9 Figure 5 1 LED Strapping Option 0 0 tte 32 Figure 5 2 Reset N Timing for Default Strap Option Mode 0 cece eee 33 Figure 5 3 Reset N Timing for EEPROM Mode 0 000 cece eee 34 Figure 5 4 Reset N Timing for SMBus Mode 000 cece ee tee eee 35 Figure 9 1 48 Pin QFN Package Outline 7x7 mm body 0 5 mm pitch nana
5. 3 3V 1 8V Strapping Master BUS Crystal Cap Options i SD SCL Upstream Upstream 24 MHz USB Data V v Internal p BUS Defaults Upstream ower Select PHY Detect Controller Serial Interface Repeater Port 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 OC Switch LED Downstream OC Switch LED USB Data Sense Drivers USB Data Sense Drivers Figure 4 1 3 Port Block Diagram Table 4 1 3 Port Hub Pin Descriptions NAME SYMBOL TYPE FUNCTION UPSTREAM USB 2 0 INTERFACE USB Bus Data USBDNO O U These pins connect to the USB bus data signals USBDPO Detect Upstream VBUS_DET 1 012 Detects state of Upstream VBUS power indicates the VBUS Power power managed state of the upstream device SMSC USB2503 USB2503A 9 Revision 2 3 08 27 07 DATASHEET E gt smsc Table 4 1 3 Port Hub Pin Descriptions continued Integrated USB 2 0 Compatible 3 Port Hub Datasheet NAME SYMBOL TYPE FUNCTION 3 PORT USB 2 0 HUB INTERFACE High Speed USB USBDN 3 1 O U These pins connect to the downstream USB peripheral Data USBDP 3 1 devices attached to the Hub s ports USB Power PRTPWR 3 1 012 Enables power to USB
6. IS Type Input Buffer Low Input Level Viki 0 8 V TTL Levels High Input Level Viki 2 0 Y Input Leakage I a na Vin 0 to Vpp33CR Vpysi 250 300 350 mV Hysteresis IS Only Input Buffer with Pull Up IPU Low Input Level Vivi 0 8 V TTL Levels High Input Level ViHI 2 0 N 26 72 uA Low Input Leakage ag N Vin 0 liHL 10 10 uA High Input Leakage Vin Vpp33CR Input Buffer with Pull Down IPD Low Input Level Vii 0 8 V TTL Levels High Input Level Tin s Y l 10 10 uA Low Input Leakage aa N Vin 0 NHL 22 82 uA High Input Leakage Vin Vpp33CR SMSC USB2503 USB2503A 39 DATASHEET Revision 2 3 08 27 07 E gt smsc Integrated USB 2 0 Compatible 3 Port Hub 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 VIHCK 2 0 Y Input Leakage I Ae la ua Vin 0 to Vpp33CR Vuysc 50 100 mV Hysteresis O12 and 1 012 Type Buffer Low Output Level VoL 0 4 V Io 19mA Vpp33CR 3 3V High Output Level VoH ea V lau 4mA VppagCR 3 3V Output Leakage 10 UA or 9 Vin 0to Vpp33CR Note 1 1 0SD12 Type Buffer Low Output Level VOL 0 4 V lo 12 mA E Vpp33CR 3 3V Output Leakage loL rig 719 HA Vin 0 to Vpp33CR Note 1 Hysteresis Vhysi 250 300 350 mV IO U Note 2 I R Note 3 Supply Current Unconfig ured High Speed Host ICCINIT 100 mA Full
7. UO pin Voltage on 0 5 4 0 V XTAL1 Voltage on 0 5 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 USB2503 USB2503A 38 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub ee SMSC Datasheet 7 2 Recommended Operating Conditions PARAMETER SYMBOL MIN MAX UNITS COMMENTS Operating Ta 0 70 C Temperature 1 8V supply voltage Vppa18pLL 1 71 1 98 V DD18 3 3V supply voltage VDDA33 3 0 3 6 V VDDA33PLL VDD33CR Voltage on any I O 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 VDDA33 Voltage on XTAL2 0 3 VoD18 Table 7 1 DC Electrical Characteristics PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS I
8. 3 08 27 07 41 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt 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 12C 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 USB2503 USB2503A 42 DATASHEET E gt smsc Chapter 9 Package Outline SSS TESS ITS CERRO IR LIRA SX KA SICILIA BN TIL Integrated USB 2 0 Compatible 3 Port Hub A Cee eee E Figure 9 1 48 Pin QFN Package Outline 7x7 mm body 0 5 mm pitch Table 9 1 48 Pin QFN Package Parameters Datasheet 1 2 Controlling Unit millimeter MIN NOMINAL MAX REMARKS A 0 70 1 00 Overall Package Height Al 0 0 02 0 05 Standoff A2 S 0 80 Mold Thickness D 6 85 7 00 7 15 X Overall Size D1 6 55 a 6 9
9. 3 2 Invalid Protocol Response Behavior on page 24 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 25 Bus Protocols Typical Write Byte and Read Byte protocols are shown below Register accesses are performed using 7 bit slave addressing an 8 bit register address field and an 8 bit data field The shading indicates the Hub driving data on the SMBDATA line otherwise host data is on the SDA SMBDATA line The slave address is the unique SMBus Interface Address for the Hub that identifies it on SMBus The register address field is the internal address of the register to be accessed The register data field is the data that the host is attempting to write to the register or the contents of the register that the host is attempting to read Note Data bytes are transferred MSB first msb first Revision 2 3 08 27 07 23 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Datasheet 5 3 1 1 Field Bits Field Bits 5 3 2 5 3 3 Revision 2 3 08 27 07 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 SMBu
10. 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 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
11. 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 Reserved Reserved 5 4 OC_TIMER OverCurrent Timer Over Current Timer delay 00 0 1ms 01 2ms 10 4ms 11 6ms COMPOUND Compound Device Designates if Hub is part of a compound device 0 z No 1 Yes Hub is part of a compound device 2 0 Reserved Reserved Revision 2 3 08 27 07 28 SMSC USB2503 USB2503A DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc 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 Reserved Bit 6 Reserved Bit 5 Reserved Bit 4 1 Reserved Bit 3 1 Port 3 non removable Bit 2 1 Port 2 non removable Bit 1 1 Port 1 non removable Bit 0 is Reserved always 0 5 3 9 11 Register OAh Port Disable For Self Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 PORT_DIS_SP Port Disable Self Po
12. Paon USB Reset completion reset A ira ngh B Idle Negation Load Stabilization recovery request asserted Upstream S l l l l I I l maba la ba A ES r E NANG An a l l l RESET_N l l l I VSS i a 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 5 6 2 USB Bus Reset SMSC USB2503 USB2503A In response to the upstream port signaling a reset to the Hub the Hub does the following Note The Hub does not propagate the upstream USB reset to downstream devices 1 Sets default address to 0 2 Sets configuration to Unconfigured 3 4 Clears all TT buffers
13. Speed Host IcciniT 95 mA Supply Current Total from all supplies Configured High Speed Host 2 Ports FS LS lucce 190 mA lucha 235 mA 2 Ports HS 215 M 1 Port HS 1 Port FS LS S 265 mA 3 Ports HS HENS Revision 2 3 08 27 07 40 DATASHEET SMSC USB2503 USB2503A Integrated USB 2 0 Compatible 3 Port Hub ee SMSC Datasheet Table 7 1 DC Electrical Characteristics continued PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS Supply Current Total from all supplies Configured Full Speed Host 1 Port NS or lecc1 150 mA 2 Ports lecce 155 mA 3 Ports lrcca 160 Supply Current IcsBy 265 uA Total from all supplies Suspend Supply Current InsT 150 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 Ta 25 C fc 1MHz Vpp3scr 3 3V LIMITS PARAMETER SYMBOL MIN TYP 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 Cour 12 pF 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 USB2503 USB2503A Revision 2
14. aaan 43 Revision 2 3 08 27 07 SMSC USB2503 USB2503A 4 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub Datasheet List of Tables Table 4 1 3 Port Hub Pin Descriptions 0 0 0 eee eae 9 Table 4 2 SMBus or EEPROM Interface Behavior aaae 11 Table 4 3 Miscellaneous Pins 2 0 00 eee eee 11 Table 4 4 Power Ground and No Comnect 2 0 00 cece teens 12 Table 4 5 Buffer Type Descriptions cette ee 13 Table 5 1 User Defined Descriptor Data 0 ete ee 18 Table 5 2 SMBus Write Byte Protocol 24 Table 5 3 SMBus Read Byte Protocol 0000 cece eee 24 Table 5 4 SMBus Slave Interface Register Map 000 cece tees 25 Table 5 5 Reset N Timing for Default Strap Option Mode 000 cece eee 33 Table 5 6 Reset N Timing for EEPROM Mode 000 ccc tenet eee 34 Table 5 7 Reset N Timing for SMBus Mode anaana cc teen eens 35 Table 7 1 DC Electrical Characteristics eee 39 Table 9 1 48 Pin QFN Package Parameters 00000 cece ett eee eee 43 SMSC USB2503 USB2503A Revision 2 3 08 27 07 5 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Chapter 1 General Description Datasheet 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 dev
15. 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 a 100mA maximum of upstream power prior to being configured by the host controller When configured as a Bus Powered device the SMSC Hub consumes less than 100mA of c
16. disabled Bit 1 1 Port 1 is disabled Bit O is Reserved always 0 SMSC USB2503 USB2503A Revision 2 3 08 27 07 21 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Datasheet 5 2 3 9 EEPROM Offset B h Max Power For Self Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7 0 MAX_PWR_SP Max Power Self_Powered Value in 2mA increments that the Hub consumes from an upstream port VBUS when operating as a self powered hub This value includes the hub silicon along with the combined power consumption from VBUS of all associated circuitry on the board This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device and the embedded peripheral reports OmA in its descriptors eae USB 2 0 Specification does not permit this value to exceed 00m A value of 50 decimal indicates 100mA 5 2 3 10 EEPROM Offset C h Max Power For Bus Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7 0 MAX_PWR_BP Max Power Bus_Powered Value in 2mA increments that the Hub consumes from an upstream port VBUS when operating as a bus powered hub This value includes the hub silicon along with the combined power consumption from VBUS of all associated circuitry on the board This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device and the embed
17. 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 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_PWR pin is used to determine if the hub is operating from self or bus power 6 PORT_IND Port Indicator Support Indicates implementation of LED indicators 0 No LED indicators 1 LED indicators 5 HS_DISABLE High Speed Disable Disables the capability to attach as either a High 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 MTT_ENABLE Multi TT enable Enables one transaction translator per port operation SMSC USB2503 USB2503A 0 single TT for all ports 1 one TT per port multiple TT s supported Revision 2 3 08 27 07 19 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc
18. peripheral devices downstream Enable The active signal level of the PRTPWR 3 1 pins are determined by the Power Polarity Strapping function of the PRTPWR_POL pin Port 3 Green LED GR3 1 012 Green indicator LED for port 3 Will be active low when LED amp PRT_DISO support is enabled via EEPROM or SMBus Port Disable strapping option If the hub is configured by the internal default configuration these pins will be sampled at RESET_N negation to determine if port 3 will be permanently disabled Also the active state of the LED will be determined as follows PRT_DISO 0 All ports are enabled GR3 is active high PRT_DISO 1 Port 3 is disabled GR3 is active low Port 2 1 Green GR 2 11 11012 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 the hub is configured by the internal default configuration Removable these pins will be sampled at RESET_N negation to t K ti determine if ports 3 1 contain permanently attached non strapping option removable devices Also the active state of the LED s will be determined as follows NON_REM 1 0 00 All ports are removable GR2 is active high GR1 is active high NON_REM1 0 01 Port 1 is non removable GR2 is active high GR1 is active low NON_REM 1 0 10 Ports 1 4 2 are non removable GR2 is active low GR1 is active high NON_REM 1 0 11 Ports
19. to exceed 100mA A value of 50 decimal indicates 100mA which is the default value 5 3 9 16 Register OFh Hub Controller Max Current For Bus Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 HC_MAX_C_BP Hub Controller Max Current Bus Powered Value in 2mA increments that the Hub consumes from an upstream port VBUS when operating as a 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 Revision 2 3 08 27 07 30 SMSC USB2503 USB2503A DATASHEET Integrated USB 2 0 Compatible 3 Port Hub ee SMSC Datasheet 5 3 9 17 Register 10h Power On Time Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 POWER_ON_TIME Power On Time The length of time that it takes in 2 ms intervals from the time the host initiated power on sequence begins on a port until power is good on that port 5 3 9 18 Undefined Registers The registers shown in Table 5 4 are the defined registers in the Hub Reads to undefined registers return 00h Writes to undefined registers have no effect and do not return an error 5 3 9 19 Reserved Registers Unless otherwise instructed onl
20. 1 2 4 3 are non removable GR2 is active low GR1 is active low Gang Power GANG_EN 1 012 If the hub is configured by the internal default configuration Switching and Current Sensing strapping option this pin will be sampled at RESET_N negation to determine if downstream port power switching and current sensing are ganged or individual port by port 0 Port by port sensing amp switching 1 Ganged sensing amp switching Revision 2 3 08 27 07 10 DATASHEET SMSC USB2503 USB2503A Integrated USB 2 0 Compatible 3 Port Hub ee smsc Datasheet Table 4 1 3 Port Hub Pin Descriptions continued NAME SYMBOL TYPE FUNCTION Port Power PRTPWR_POL 1 012 Port Power Polarity strapping determination for the active Polarity strapping signal polarity of the PRTPWR 3 1 pins While RESET_N is asserted the logic state of this pin will though the use of internal combinatorial logic determine the active state of the PRTPWR 3 1 pins in order to ensure that downstream port power is not inadvertently enabled to inactive ports during a hardware reset When RESET_N is negated the logic value will be latched internally and will retain the active signal polarity for PRTPWR 3 1 pins 1 PRTPWR 3 1 pins have an active high polartity 0 PRTPWR 3 1 pins have an active low polarity Over Current OCS 3 1 _N IPU Input f
21. 11 DATASHEET E gt SMSC Table 4 3 Miscellaneous Pins continued Integrated USB 2 0 Compatible 3 Port Hub Datasheet 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 Enable CLKIN_EN Clock In Enable Low XTAL1 and XTAL2 pins configured for use with external crystal High XTAL1 pin configured as CLKIN and must be driven by an external CMOS clock RESET Input Self Power Bus Power Detect RESET_N SELF_PWR Detects availability of local self power source This active low signal is used by the system to reset the chip The minimum active low pulse is 100ns Low Self local power source is NOT available i e 7 Port Hub gets all power from Upstream USB VBus High Self local power source is available TEST Pins TEST 1 0 IPD Used for testing the chip User must treat as a no connect or connect to ground For board testing all signal pins are included in an XNOR chain Please see Chapter 6 XNOR Test on page 37 for more details on the configuration and use of the XNOR mode Analog Test amp Internal 1 8V voltage regulator enable ATEST REG_EN AlO This signal is used for testing the analog
22. 5 X Mold Cap Size D2 2 25 5 60 X exposed Pad Size E 6 85 7 00 7 15 Y Overall Size El 6 55 6 95 Y Mold Cap Size E2 2 25 S 5 60 Y exposed Pad Size L 0 30 S 0 50 Terminal Length e 0 50 Basic Terminal Pitch b 0 18 S 0 20 Terminal Width ccc 0 08 Coplanarity Notes Dimension b applies to plated terminals and is measured between 0 15mm and 0 30mm from the terminal tip Tolerance on the true position of the terminal is 0 05 mm at maximum material conditions MMC Details of terminal 1 identifier are optional but must be located within the zone indicated Coplanarity zone applies to exposed pad and terminals Revision 2 3 08 27 07 43 DATASHEET SMSC USB2503 USB2503A
23. BYTES HEX HEX DESCRIPTION VID 1 0 2 0424 0424 Vendor ID assigned by USB IF PID 3 2 2 2503 2503 Product ID assigned by Manufacturer DID 5 4 2 0000 0000 Device ID assigned by Manufacturer Config Data 6 1 98 1C Configuration data byte 1 for Hub options Byte 1 Config Data 7 1 90 90 Configuration data byte 2 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 2mA 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 Revision 2 3 08 27 07 18 DATASHEET SMSC USB2503 USB2503A Integrated USB 2 0 Compatible 3 Port Hub E gt SMSC 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
24. E PLL VSS VSS Ground Table 4 5 Buffer Type Descriptions BUFFER DESCRIPTION Input IPD Input with a weak Internal pull down IPU Input with a weak Internal pull up IS Input with Schmitt trigger 012 Output 12mA 1 012 Input Output 12mA IOSD12 Open drain 12mA sink with Schmitt trigger and must meet I2C Bus Specification Version 2 1 requirements ICLKx XTAL Clock Input OCLKx XTAL Clock Output I R RBIAS 10 U Defined in USB Specification Note Meets USB 1 1 requirements when operating as a 1 1 compliant device and meets USB 2 0 requirements when operating as a 2 0 compliant device AlO Analog Input output Per PHY test requirements SMSC USB2503 USB2503A Revision 2 3 08 27 07 13 DATASHEET E gt smsc Integrated USB 2 0 Compatible 3 Port Hub 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 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 configuration divided into 4 non periodic buffers per TT Hub Configuration Options The SMSC Hub supports a large number of features and must
25. ET N SMSC USB2503 USB2503A 33 Revision 2 3 08 27 07 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt SMSC Datasheet 5 6 1 2 RESET_N for EEPROM Configuration Start Hardware Read Strap Pead EEPROM Attach USB Reset completion Nasa Options USB recover ide request asserted P Set paan Upstream y q Y L ANYS NE t4 e t1 t2 t3 t5 t6 T7 ih l RESET_N l U Y Y VSS Figure 5 3 Reset_N Timing for EEPROM Mode Table 5 6 Reset_N Timing for EEPROM Mode NAME DESCRIPTION MIN TYP MAX UNITS t1 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 Notes When in Bus Powered mode the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t4 t5 t6 t7 All Power Supplies must have reached the operating levels mandated in Section Chapter 7 DC Parameters prior to or coincident with the assertion of RESET N Revision 2 3 08 27 07 DATASHEET SMSC USB2503 USB2503A Integrated USB 2 0 Compatible 3 Port Hub E gt SMSC Datasheet 5 6 1 3 RESET_N for SMBus Slave Configuration Start Farawar Reset SMBus Code Hub PHY
26. Eh 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 ldle State 1 Force a reset 1 WRITE_PROT Write Protect The external SMBus host sets this bit after the Hub s internal memory is loaded with configuration data Note The External SMBus Host is responsible for verification of downloaded data 0 The internal memory address range 01 10h is not write protected 1 The internal memory address range 01 10h is write protected to prevent unintentional data corruption Note This bit is write once and is only cleared by assertion of the external RESET_N pin 0 USB_ATTACH USB Attach 8 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 externa
27. 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 SMSC USB2503 USB2503A 16 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt SMSC 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 p
28. R2 PRTPWR3 PRT_DISO PRTPWR_POL OCS1 N OCS2 N OCS3 N GANG EN RBIAS SERIAL PORT 3 PINS SDA SMBDATA SCL SMB CFG SEL1 CLK CFG SELO MISC 8 PINS XTAL1 CLKIN XTAL2 RESET N SELF PWR TEST1 TESTO ATEST CLKIN EN REG EN POWER amp GROUNDS 16 PINS SMSC USB2503 USB2503A 7 DATASHEET Revision 2 3 08 27 07 Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Chapter 3 Pin Configuration 3 Port Hub Datasheet o d Lu sa O LL SE NG lt e C o a Ze Kaat U z z a 0 2 g mg I To Ape 5 nm XxX A Hk OGVGoOJOJx w TO C O Dn 0o Mm WU Lk O QO KH O O NHO S5 SS Nd O DA DW on tr 2 A O a O MW O O O DM DM DA DQ DM DO N NNN AN 24 i TESTO 23 i VDD18 22 VSS SMSC 21 GR1 NON_REMO USB2503 20 GANG_EN amp 19 GR2 NON_REM1 18 PRTPWR_POL VDDA18PLL if USB2503A 17 i GR3 PRT_DISO VDDA33PLL ff Top View QFN 48 16 PRTPWR2 ATEST REG EN E Thermal Slug 15 OCS3 N RBIAS E must be connected to VSS 14 Ip PRTPWERS VSS El 13 i VDDA33 O T qN A 2Q Xx 2H O N O GYT rr O E n Oo O O 0r 7 2 N N DN EM m Maa Z OZ NN NAA ZAZA TAAS DD OO gt Da O O mm nm o o m om a Qn Mm ND DO D DO DN O W gt D IJ 5 D gt DD i Indicates pins on the bottom of the device Figure 3 1 3 Port 48 Pin QFN Revision 2 3 08 27 07 SMSC USB2503 USB2503A 8 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub Datasheet er sms Chapter 4 3 Port Hub Block Diagram To Pin EEPROM or SMBus
29. SMSC SUCCESS BY DESIGN PRODUCT FEATURES USB2503 AR USB2503A ge USE Integrated USB 2 0 Compatible 3 Port Hub Datasheet Integrated USB 2 0 Compatible 3 Port Hub 3 Transaction Translators for highest performance High Speed 480Mbits s Full Speed 12Mbits s and Low Speed 1 5Mbits s compatible Full power management with per port or ganged selectable power control Detects Bus Power Self Power source and changes mode automatically Complete USB Specification 2 0 Compatibility Includes USB 2 0 Transceivers VID PID DID and Port Configuration for Hub via Single Serial 2C 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 1 8 Volt Low Power Core Operation 3 3 Volt I O with 5V Input Tolerance 48 Pin QFN lead free RoHS compliant package SMSC USB2503 USB2503A DATASHEET Revision 2 3 08 27 07 Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Datasheet ORDER NUMBERS USB2503 USB2503A HZH FOR 48 PIN QFN LEAD FREE ROHS COMPLIANT PACKAGE E gt smsc
30. a single dedicated 12C EEPROM and it conforms to the Standard mode I2C Specification 100kbit s transfer rate and 7 bit addressing for protocol and electrical compatibility Note Extensions to the 12C Specification are not supported The Hub acts as the master and generates the serial clock SCL controls the bus access determines which device acts as the transmitter and which device acts as the receiver and generates the START and STOP conditions 5 2 1 1 Implementation Characteristics Please refer to the MicroChip 24AA00 DataSheet for Protocol and Programming specifics 5 2 1 2 Pull Up Resistor The Circuit board designer is required to place external pull up resistors 10KQ recommended on the SDA SMBDATA 8 SCL SMBCLK CFG_SELO lines per SMBus 1 0 Specification and EEPROM manufacturer guidelines to Vcc in order to assure proper operation SMSC USB2503 USB2503A Revision 2 3 08 27 07 17 DATASHEET E gt smsc Integrated USB 2 0 Compatible 3 Port Hub Datasheet 5 2 1 3 12C 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
31. ace options When using the internal default option the GANG_EN pin will configure the hub for ganged or individual port by port port power switching 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 Revision 2 3 08 27 07 15 DATASHEET E gt 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 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 Self Powered Port DISABLE During Self Powered operation this selects the ports which will be permanently disabled and are not available to be enabled or enumerated by a Host Controller The disabled ports must be contiguous and must be in
32. ble This field is set by the OEM using either the SMBus or EEPROM interface options Multiple TT Support Selects between a mode where only one transaction translator is available for all ports Single TT or each port gets a dedicated transaction translator Multi TT Note The host may force Single TT mode only This field is set by the OEM using either the SMBus or EEPROM interface options EOP Disable During FS operation only this permits the Hub to send EOP if no downstream traffic is detected at EOF1 See Section 11 3 1 of the USB 2 0 Specification for additional details This field is set by the OEM using either the SMBus or EEPROM interface options Current Sensing Selects current sensing on a port by port basis all ports ganged or none only for bus powered hubs The ability to support current sensing on a port or ganged basis is hardware implementation dependent This field can be set by the OEM using either the SMBus or EEPROM interface options When using the internal default option the SELF_PWR pin determines if current sensing will be ganged or none ganged if self powered none if bus powered Downstream Port Power Enabling Enables all ports simultaneously ganged or port power is individually switched on and off on a port by port basis The ability to support power enabling on a port or ganged basis is hardware implementation dependent This field is set by the OEM using either the SMBus or EEPROM interf
33. decreasing order starting with port 3 This field is set by the OEM using either the SMBus or EEPROM interface options When using the internal default option the PRT_DISO pin will disable the appropriate ports Bus Powered Port DISABLE During Bus Powered operation this selects the ports which will be permanently disabled and are not available to be enabled or enumerated by a Host Controller The disabled ports must be contiguous and must be in decreasing order starting with port 3 This field is set by the OEM using either the SMBus or EEPROM interface options When using the internal default option the PRT_DISO pin will disable the appropriate ports Dynamic Power Controls the ability of the 3 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 3 port Hub will always switch to Self Powered operation When Dynamic Power switching is enabled the Hub detects the availability of a local power source by monitoring the external SELF_PWR pin If the Hub detects a change in power source availability the Hub immediately disconnects and removes power from all downstream devices and disconnects the upstream port The Hub will then re attach to the upstream port as either a Bus Powered Hub if local power in unavailable or a Self
34. ded 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 attached peripheral if the hub is configured as a compound device Note The USB 2 0 Specification does not permit this value to exceed 00mA A value of 50 decimal indicates 100mA which is the default value Revision 2 3 08 27 07 SMSC USB2503 USB2503A 22 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub Datasheet 2 3 12 ee smsc EEPROM Offset E h Hub Controller Max Current For Bus Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7 0 HC_MAX_C_BP Hub Controller Max Current Bus Powered Value in 2mA increments that the Hub consumes from an upstream port VBUS when operating as a 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 attac
35. eserved Reserved Revision 2 3 08 27 07 SMSC USB2503 USB2503A 20 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Datasheet 5 2 3 6 EEPROM Offset 8 h Non Removable Device BIT NUMBER BIT NAME DESCRIPTION 7 0 NR_DEVICE Non Removable Device Indicates which port s include non removable devic es 0 port is removable 1 port is non removable Bit 7 Reserved Bit 6 Reserved Bit 5 Reserved Bit 4 Reserved Bit 3 1 Port 3 non removable Bit 2 1 Port 2 non removable Bit 1 1 Port 1 non removable Bit 0 is Reserved always 0 5 2 3 7 EEPROM Offset 9 h Port Disable For Self Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7 0 PORT_DIS_SP Port Disable Self Powered Disables 1 or more contiguous ports 0 port is available 1 port is disabled Bit 7 Reserved Bit 6 Reserved Bit 5 Reserved Bit 4 Reserved Bit 3 1 Port 3 is disabled Bit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit O is Reserved always 0 5 2 3 8 EEPROM Offset A h Port Disable For Bus Powered Operation BIT NUMBER BIT NAME DESCRIPTION 7 0 PORT_DIS_BP Port Disable Bus Powered Disables 1 or more contiguous ports 0 port is available 1 port is disabled Bit 7 Reserved Bit 6 Reserved Bit 5 Reserved Bit 4 Reserved Bit 3 1 Port 3 is disabled Bit 2 1 Port 2 is
36. hed 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 5 3 1 SMSC USB2503 USB2503A SMBus Slave Interface Instead of loading User Defined Descriptor data from an external EEPROM the SMSC Hub can be configured to receive a code load from an external processor via an SMBus interface The SMBus interface shares the same pins as the EEPROM interface if CFG_SEL1 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
37. ices on all of the enabled downstream ports A dedicated Transaction Translator TT is available for each downstream facing port This architecture ensures maximum USB throughput for each connected device when operating with mixed speed peripherals The Hub works with an external USB power distribution switch device to control Vpys switching to downstream ports and to limit current and sense over current conditions All required resistors on the USB ports are integrated into the Hub This includes all series termination resistors on D and D pins and all required pull down and pull up resistors on D and D pins The over current sense inputs for the downstream facing ports have internal pull up resistors Throughout this document the upstream facing port of the hub will be referred to as the upstream port and the downstream facing ports will be called the downstream ports 1 1 OEM Selectable Features A default configuration is available in the USB2503 USB2503A 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 USB2503 USB2503A 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 t
38. if the SMBus option is not disabled Revision 2 3 08 27 07 SMSC USB2503 USB2503A 32 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub E gt SMSC Datasheet 5 6 1 1 RESET_N for Strapping Option Configuration Hardware Drive Strap Attach Sian Read Strap Outputs to USB Reset completion reset F USB Idle Options inactive recovery request asserted Upstream levels SOA Yu y NG l Kn Sete RL 6 te Br ail 8 7 a if T P TTT TT RESET_N l me I 1 l E T T vss Ny Pa i Strap Pins l l l Don t Care Driven by Hub if strap is an output vss ne 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 t1 RESET_N Asserted 1 usec t2 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 t5 USB Attach See Note 100 msec t6 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 When in Bus Powered mode the Hub and its associated circuitry must not consume more than 100mA from the upstream USB power source during t1 t5 All Power Supplies must have reached the operating levels mandated in Section Chapter 7 DC Parameters prior to or coincident with the assertion of RES
39. l 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 Revision 2 3 08 27 07 SMSC USB2503 USB2503A 26 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub ee SMSC 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 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 PWR pin is used to determine if the hub is operating fro
40. m self or bus power 6 PORT IND Port Indicator Support Indicates implementation of LED indicators SMSC USB2503 USB2503A 0 No LED indicators 1 LED indicators 27 Revision 2 3 08 27 07 DATASHEET E gt smsc Integrated USB 2 0 Compatible 3 Port Hub 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 MTT_ENABLE Multi TT enable Enables one transaction translator per port operation 0 single TT for all ports 1 one TT per port multiple TT s supported EOP_DISABLE EOP Disable Disables EOP generation of EOF1 when in Full Speed mode 0 EOP generation is normal 1 EOP generation is disabled 2 1 CURRENT_SNS Over Current Sense Indicates whether current sensing is on a port by port basis or ganged 00 Ganged sensing all ports together 01 Individual port by port 1x Over current sensing not supported must only be used with Bus Powered configurations PORT_PWR Port Power Switching Indicates whether port power switching is on a port by port basis or ganged 0 Ganged switching all ports together 1 Individual port by port switching 5 3 9 9 Register 08h Configuration
41. nfiguration the LED functions with active high signalling and the PAD will source the current to the external LED Revision 2 3 08 27 07 31 DATASHEET E gt smsc Integrated USB 2 0 Compatible 3 Port Hub Datasheet Strap High Strap Low Figure 5 1 LED Strapping Option 5 6 Reset There are two different resets that the Hub experiences One is a hardware reset via the RESET_N pin and the second is a USB Bus Reset 5 6 1 External Hardware RESET_N A valid hardware reset is defined as assertion of RESET N for a minimum of 1us after all power supplies are within operating range While reset is asserted the Hub and its associated external circuitry consumes less than 500nA of current from the upstream USB power source 300uA for the Hub and 200A for the external circuitry Assertion of RESET_N external pin causes the following 1 All downstream ports are disabled and PRTPWR power to downstream devices is removed The PHYs are disabled and the differential pairs will be in a high impedance state All transactions immediately terminate no states are saved 2 3 4 5 6 7 All internal registers return to the default state in most cases 00 h The external crystal oscillator is halted The PLL is halted 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
42. o all configuration data bit fields the hub will attach to the host with all 0 values The 3 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 Multiple Transaction Translator Multi TT or Single TT support a Optional OEM configuration via 12C EEPROM or via the industry standard SMBus interface from an external SMBus Host Port power switching on an individual or ganged basis Port over current monitoring on an individual or ganged basis Compound device support port is permanently hardwired to a downstream USB peripheral device Hardware strapping options enable configuration of the following features Non Removable Ports Port Power Polarity active high or active low logic Port Disable Ganged Vs Port power switching and over current sensing Revision 2 3 08 27 07 SMSC USB2503 USB2503A 6 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub Datasheet Chapter 2 Pin Table 3 Port Table 2 1 3 Port Pin Table E gt SMSC UPSTREAM USB 2 0 INTERFACE 3 PINS USBDPO USBDNO VBUS_DET 3 PORT USB INTERFACE 18 PINS USBDP1 USBDN1 USBDP2 USBDN2 USBDP3 USBDN3 GR1 GR2 NON_REMO NON_REM1 GR3 PRTPWR1 PRTPW
43. on 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 BIT4 BIT3 BIT2 BIT1 LSB 00h R W Status Command STCD 7 6 5 4 3 2 1 0 01h R W VID LSB VIDL 7 6 5 4 3 2 1 0 02h R W VID MSB VIDM 7 6 5 4 3 2 1 0 03h R W PID LSB PIDL 7 6 5 4 3 2 1 0 04h R W PID MSB PIDM 7 6 5 4 3 2 1 0 05h R W DID LSB DIDL 7 6 5 4 3 2 1 0 06h R W DID MSB DIDM 7 6 5 4 3 2 1 0 07h R W Config Data Byte 1 CFG1 7 6 5 4 3 2 1 0 08h R W Config Data Byte 2 CFG2 7 6 5 4 3 2 1 0 09h R W Non Removable 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 SMSC USB2503 USB2503A 25 DATASHEET Revision 2 3 08 27 07 Integrated USB 2 0 Compatible 3 Port Hub E gt smsc Datasheet Table 5 4 SMBus Slave Interface Register Map continued REG BIT7 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 O
44. owered on port This field is set by the OEM using either the SMBus or EEPROM interface options 5 1 1 22 Power Switching Polarity The selection of active state polarity for the PRTPWR 3 1 pins is made by a strapping option only 5 1 2 VBus Detect According to Section 7 2 1 of the USB 2 0 Specification a downstream port can never provide power to its D or D pull up resistors unless the upstream port s VBUS is in the asserted powered state The VBUS_DET pin on the Hub monitors the state of the upstream VBUS signal and will not pull up the D or D resistor if VBUS is not active If VBUS goes from an active to an inactive state Not Powered Hub will remove power from the D or D pull up resistor within 10 seconds 5 2 EEPROM Interface The SMSC Hub can be configured via a 2 wire I2C EEPROM Please see Figure 4 1 3 Port Hub Pin Descriptions for specific details on how to enable the 12C EEPROM option The Internal state machine will when configured for EEPROM support read the external EEPROM for configuration data The hub will then attach to the upstream USB host Please see Table 5 1 User Defined Descriptor Data for a list of data fields available 5 2 1 12C EEPROM The I2C EEPROM interface implements a subset of the 12C Master Specification Please refer to the Philips Semiconductor Standard 12C Bus Specification for details on 12C bus protocols The Hub s 12C EEPROM interface is designed to attach to
45. rom 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 SERIAL PORT INTERFACE Serial Data SMB SDA SMBDATA lOSD12 Serial Data SMB Data signal Data Serial Clock SMB SCL SMBCLK IOSD12 Serial Clock SMB Clock signal This multifunction pin is Clock CFG_SELO read on the rising edge of RESET_N negation and will amp determine the hub configuration method as described in Chip Select Table 4 2 EEPROM Select SMB CFG_SEL1 l This pin is read on the rising edge of RESET_N negation Programming and will detemine the hub configuration method as Select described in Table 4 2 Table 4 2 SMBus or EEPROM Interface Behavior CFG_SEL1 CFG_SELO SMBus or EEPROM interface behavior 0 X Configured as an SMBus slave for external download of user defined descriptors SMBus slave address is 0101101 1 0 Internal Default Configuration via strapping options 1 1 2 wire 12C EEPROMS are supported and CFG SELO has no other functionality 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 SMSC USB2503 USB2503A Revision 2 3 08 27 07
46. rts 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 5 3 9 14 Register ODh 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 Controller Max Current For Self Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION 7 0 HC_MAX_C_SP Hub Controller Max Current Self Powered Value in 2mA increments that the Hub consumes from an upstream port VBUS when operating as a 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
47. s 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 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 Start Slave Wr Ack Reg Ack Start Slave Rd Ack Reg Nack Stop Addr Addr Addr Data 7 1 1 8 1 1 7 1 1 8 1 1 Invalid Protocol Response Behavior Registers that are accessed with an invalid protocol are not updated A register is only updated following a valid protocol The only valid protocols are Write Byte and Read Byte which are described above The Hub only respond
48. s 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 SMSC USB2503 USB2503A 24 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub ee SMSC Datasheet 5 3 4 Slave Device Time Out According to the SMBus Specification V1 0 devices in a transfer can abort the transfer in progress and release the bus when any single clock low interval exceeds 25ms TrimeouT min Devices that have detected this condition must reset their communication and be able to receive a new START condition no later than 35ms TTIMEOUT MAX Note Some simple devices do not contain a clock low drive circuit this simple kind of device typically resets its communications port after a start or stop condition 5 3 5 Stretching the SCLK Signal The Hub supports stretching of the SCLK by other devices on the SMBus The Hub does not stretch the SCLK 5 3 6 SMBus Timing The SMBus Slave Interface complies with the SMBus AC Timing Specification See the SMBus timing in the Timing Diagram secti
49. section of the chip and to enable or disable the internal 1 8v regulator This pin must be connected to VDDA3P3 to enable the internal 1 8V regulator or to VSS to disable the internal regulator When the internal regulator is enabled the 1 8V power pins must be left unconnected except for the required bypass capacitors When the PHY is in test mode the internal regulator is disabled and the ATEST pin functions as a test pin Table 4 4 Power Ground and No Connect NAME SYMBOL TYPE FUNCTION VDD1P8 VDD18 1 8V core power If the internal regulator is enabled then VDD18 pin closest to VDD33CR must have a 4 7UF or greater 2096 ESR lt 0 102 capacitor to VSS VDDPLL1P8 VDDA18PLL 1 8V Filtered analog power for internal PLL If the internal regulator is enabled then this pin must have a 4 7UF or greater 2096 ESR 20 102 capacitor to VSS VDDAPLL3P3 VDDA3P3 3 3V Filtered analog power VDDA33PLL VDDA33 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 Revision 2 3 08 27 07 12 DATASHEET SMSC USB2503 USB2503A Integrated USB 2 0 Compatible 3 Port Hub ee smsc Datasheet Table 4 4 Power Ground and No Connect continued NAME SYMBOL TYPE FUNCTION VDD3P3 VDD33CR 3 3V I O and Core power COR
50. to personal injury or severe property damage Any and all such uses without prior written approval of an Officer of SMSC and further testing and or modification will be fully at the risk of the customer Copies of this document or other SMSC literature as well as the Terms of Sale Agreement may be obtained by visiting SMSC s website at http www smsc com SMSC is a registered trademark of Standard Microsystems Corporation SMSC Product names and company names are the trademarks of their respective holders SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE TITLE AND AGAINST INFRINGEMENT AND THE LIKE AND ANY AND ALL WARRANTIES ARISING FROM ANY COURSE OF DEALING OR USAGE OF TRADE IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT INCIDENTAL INDIRECT SPECIAL PUNITIVE OR CONSEQUENTIAL DAMAGES OR FOR LOST DATA PROFITS SAVINGS OR REVENUES OF ANY KIND REGARDLESS OF THE FORM OF ACTION WHETHER BASED ON CONTRACT TORT NEGLIGENCE OF SMSC OR OTHERS STRICT LIABILITY BREACH OF WARRANTY OR OTHERWISE WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES Revision 2 3 08 27 07 SMSC USB2503 USB2503A 2 DATASHEET Integrated USB 2 0 Compatible 3 Port Hub Datasheet Table of Contents Chapter 1 General Description
51. urrent prior to being configured After configuration the Bus Powered SMSC Hub along with all associated hub circuitry any embedded devices if part of a compound device and 100mA per externally available downstream port must consume no more than 500mA of upstream VBUS current The current consumption is system dependent and the OEM must ensure that the USB 2 0 specifications are not violated When configured as a Self Powered device lt 1mA of upstream VBUS current is consumed and all 7 ports are available with each port being capable of sourcing 500mA of current This field is set by the OEM using either the SMBus or EEPROM interface options When using the internal default option the SELF_PWR pin determines the Self powered or Bus powered status Please see the description under Dynamic Power for the self bus power functionality when dynamic power switching is enabled 14 SMSC USB2503 USB2503A DATASHEET Integrated USB 2 0 Compatible 3 Port Hub 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 USB2503 USB2503A ee SMSC 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 High Speed Disable Allows an OEM to force the Hub to configure as a Full Speed device only i e High Speed not availa
52. wered Disables 1 or more contiguous ports 0 port is available 1 port is disabled Bit 7 Reserved Bit 6 Reserved Bit 5 Reserved Bit 4 Reserved1 Bit 3 1 Port 3 is disabled Bit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit O 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 Reserved Bit 6 Reserved Bit 5 Reserved Bit 4 Reserved1 Bit 3 1 Port 3 is disabled Bit 2 1 Port 2 is disabled Bit 1 1 Port 1 is disabled Bit O is Reserved always 0 5 3 9 13 Register OCh Max Power For Self Powered Operation Reset 0x00 BIT NUMBER BIT NAME DESCRIPTION SMSC USB2503 USB2503A Revision 2 3 08 27 07 29 DATASHEET E gt SMSC Integrated USB 2 0 Compatible 3 Port Hub Datasheet 7 0 MAX_PWR_SP Max Power Self Powered Value in 2mA increments that the Hub consumes from an upstream port VBUS when operating as a self powered hub This value includes the hub silicon along with the combined power consumption from VBUS of all associated circuitry on the board This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device and the embedded peripheral repo
53. y a 0 may be written to all reserved registers or bits 5 4 Default Configuration Option The SMSC Hub can be configured via its internal default configuration please see Chapter 3 Pin Configuration 3 Port Hub for specific details on how to enable default configuration Please refer to Table 5 1 on page 18 for the internal default values that are loaded when this option is selected 5 5 Default Strapping Options SMSC USB2503 USB2503A The SMSC Hub can be configured via a combination of internal default values and pin strap options Please see Table 4 1 3 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 18 for the internal default values that are loaded when this option is selected The Green LED pins are sampled after RESET_N negation and the logic values are used to configure the hub if the internal default configuration mode is selected The implementation shown below see Figure 5 1 shows a recommended passive scheme When a pin is configured with a Strap High configuration the LED functions with active low signalling and the PAD will sink the current from the external supply When a pin is configured with a Strap Low co

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