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PRODUCT FEATURES
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
VID/PID/DID, and Port Configuration for Hub via:
2
— Single Serial I
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
SMSC USB2502
USB2502
2-Port USB 2.0 Hub
Controller
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
DATASHEET
Datasheet
Revision 2.3 (08-27-07)
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Table of Contents
Related Manuals for SMSC USB2502
Summary of Contents for SMSC USB2502
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Page 1: Product Features
— 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 SMSC USB2502 USB2502 2-Port USB 2.0 Hub Controller On-Board 24MHz Crystal Driver Circuit or 24 MHz external clock driver Internal PLL for 480MHz USB 2.0 Sampling... -
Page 2: Order Numbers
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. -
Page 3: Table Of Contents
Chapter 9 Package Outlines ..........43 SMSC USB2502 DATASHEET Revision 2.3 (08-27-07) - Page 4 Table 9.1 48 Pin TQFP Package ............44 Revision 2.3 (08-27-07) SMSC USB2502 DATASHEET...
- Page 5 Figure 9.1 36 Pin QFN Package ............43 Figure 9.2 48 Pin TQFP Package Outline (7x7x1.4 mm body, 2mm Footprint) ....44 SMSC USB2502 Revision 2.3 (08-27-07)
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Page 6: Chapter 1 General Description
Chapter 1 General Description The SMSC 2-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 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. -
Page 7: Chapter 2 Pin Table 2-Port
UPSTREAM USB 2.0 INTERFACE (3 PINS) USBDP0 USBDP1 GR1/ NON_REM0 PRTPWR SDA/SMBDATA SCL/SMBCLK/ XTAL1/CLKIN ATEST/ REG_EN SMSC USB2502 Table 2.1 2-Port Pin Table for 36-QFN USBDN0 VBUS_DET 2-PORT USB 2.0 INTERFACE (10 PINS) USBDN1 USBDP2 GR2/ PRTPWR_POL NON_REM1 OCS_N SERIAL PORT INTERFACE (3 PINS) -
Page 8: Table 2.2 2-Port Pin Table For 48-Tqfp
USBDN0 VBUS_DET 2-PORT USB 2.0 INTERFACE (10 PINS) USBDN1 USBDP2 GR2/ PRTPWR_POL NON_REM1 OCS_N SERIAL PORT INTERFACE (3 PINS) CFG_SEL1 CFG_SEL0 MISC (7 PINS) XTAL2 RESET_N CLKIN_EN TEST DATASHEET 2-Port USB 2.0 Hub Controller Datasheet USBDN2 RBIAS SELF_PWR SMSC USB2502... -
Page 9: Chapter 3 Pin Configuration 2-Port Hub
Chapter 3 Pin Configuration 2-Port Hub VDD33CR XTAL2 XTAL1/CLKIN VDDA18PLL VDDA33PLL ATEST/REG_EN RBIAS Indicates pins on the bottom of the device. SMSC USB2502 SMSC USB2502 (Top View QFN-36) Thermal Slug (must be connected to VSS) Figure 3.1 2-Port 36-Pin QFN DATASHEET VDD18... -
Page 10: Figure 3.2 2-Port 48-Pin Tqfp
2-Port USB 2.0 Hub Controller Datasheet Figure 3.2 2-Port 48-Pin TQFP Revision 2.3 (08-27-07) SMSC USB2502 DATASHEET... -
Page 11: Chapter 4 2-Port Hub Block Diagram
IO-U These pins connect to the upstream USB bus data signals. I/O8 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. - Page 12 A 12.0k Ω ( +/− 1%) resistor is attached from ground to this pin to set the transceiver’s internal bias settings. DATASHEET 2-Port USB 2.0 Hub Controller Datasheet FUNCTION Section 5.6.1) Section 5.6.1), the logic value will SMSC USB2502...
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Page 13: Table 4.2 Smbus Or Eeprom Interface Behavior
RESET Input RESET_N Self-Power / SELF_PWR Bus-Power Detect TEST Pin TEST SMSC USB2502 TYPE SERIAL PORT INTERFACE IOSD12 (Serial Data)/(SMB Data) signal. IOSD12 (Serial Clock)/(SMB Clock) signal. This multifunction pin is read on the rising edge of RESET_N (see the applicable... -
Page 14: Table 4.4 Power, Ground, And No Connect
If the internal regulator is enabled, then this pin must μ have a 4.7 F (or greater) ±20% (ESR <0.1 to VSS +3.3V Filtered analog power. Ground. Table 4.5 Buffer Type Descriptions DESCRIPTION DATASHEET 2-Port USB 2.0 Hub Controller Datasheet FUNCTION FUNCTION Ω) Ω) capacitor SMSC USB2502... - Page 15 IO-U Defined in USB Specification. Note: Meets USB 1.1 requirements when operating as a 1.1-compliant device and meets USB 2.0 requirements when operating as a 2.0-compliant device. Analog Input/output. Per PHY test requirements. SMSC USB2502 DESCRIPTION DATASHEET Revision 2.3 (08-27-07)
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Page 16: Chapter 5 Functional Block Description
5.1.1 Hub Configuration 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_SEL0 pins immediately after RESET_N negation. - Page 17 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.} SMSC USB2502 DATASHEET Revision 2.3 (08-27-07)
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Page 18: Vbus Detect
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. Revision 2.3 (08-27-07) DATASHEET 2-Port USB 2.0 Hub Controller Datasheet SMSC USB2502... -
Page 19: Eeprom Interface
2-Port USB 2.0 Hub Controller Datasheet EEPROM Interface The SMSC Hub can be configured via a 2-wire (I2C) EEPROM. (Please see Pin Descriptions" for specific details on how to enable the I2C EEPROM option). The Internal state-machine will, (when configured for EEPROM support) read the external EEPROM for configuration data. - Page 20 DESCRIPTION Most Significant Byte of the Vendor ID. Least Significant Byte of the Vendor ID. DESCRIPTION Most Significant Byte of the Product ID. Least Significant Byte of the Product ID. DATASHEET 2-Port USB 2.0 Hub Controller Datasheet DESCRIPTION SMSC USB2502...
- Page 21 5.2.3.5 EEPROM Offset 7(h) - CONFIG_BYTE_2 NUMBER BIT NAME DYNAMIC Reserved SMSC USB2502 DESCRIPTION Most Significant Byte of the Device ID. Least Significant Byte of the Device ID. DESCRIPTION Self or Bus Power: Selects between Self- and Bus-Powered operation. 0 = Bus-Powered operation. (BUS Default) 1 = Self-Powered operation.
- Page 22 ‘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’ DATASHEET 2-Port USB 2.0 Hub Controller Datasheet SMSC USB2502...
- Page 23 EEPROM Offset D(h) - Hub Controller Max Current For Self Powered Operation NUMBER BIT NAME HC_MAX_C_SP SMSC USB2502 DESCRIPTION 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.
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Page 24: Smbus Slave Interface
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. -
Page 25: Invalid Protocol Response Behavior
Registers Section. See 5.3.3 General Call Address Response The Hub does not respond to a general call address of 0000_000b. SMSC USB2502 Denotes Slave-to-Master Table 5.2 SMBus Write Byte Protocol Reg. Addr is performed correctly. Only one byte is transferred at a time for a Read Table 5.3 SMBus Read Byte Protocol... -
Page 26: Slave Device Time-Out
ABBR (MSB) BIT 6 BIT 5 BIT 4 STCD VIDL VIDM PIDL PIDM DIDL DIDM CFG1 CFG2 DATASHEET 2-Port USB 2.0 Hub Controller Datasheet ). Devices that TIMEOUT, MIN BIT 0 BIT 3 BIT 2 BIT 1 (LSB) SMSC USB2502... - Page 27 Register 00h: Status/Command (Reset = 0x00) NUMBER BIT NAME Reserved RESET WRITE_PROT USB_ATTACH 5.3.9.2 Register 01h: Vendor ID (LSB) (Reset = 0x00) NUMBER BIT NAME VID_LSB SMSC USB2502 BIT 7 ABBR (MSB) BIT 6 BIT 5 MAXPS MAXPB HCMCS HCMCB PWRT DESCRIPTION Reserved.
- Page 28 1 = Self-Powered operation. Note: If Dynamic Power Switching is enabled, this bit is ignored and the SELF_PWR pin is used to determine if the hub is operating from self or bus power. Reserved DATASHEET 2-Port USB 2.0 Hub Controller Datasheet SMSC USB2502...
- Page 29 BIT NAME DYNAMIC Reserved OC_TIMER COMPOUND Reserved SMSC USB2502 DESCRIPTION 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!) Reserved EOP Disable: Disables EOP generation of EOF1 when in Full-Speed mode.
- Page 30 0mA in its descriptors. Note: The USB 2.0 Specification does not permit this value to exceed 100mA A value of 50 (decimal) indicates 100mA. DATASHEET 2-Port USB 2.0 Hub Controller Datasheet SMSC USB2502...
- Page 31 Undefined Registers The registers shown in return 00h. Writes to undefined registers have no effect and do not return an error. SMSC USB2502 DESCRIPTION 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.
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Page 32: Default Configuration Option
Please refer to Table 5.1 on page 19 selected. 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" default/pin-strap configuration option. -
Page 33: External Hardware Reset_N
Table 5.5 Reset_N Timing for Default/Strap Option Mode NAME DESCRIPTION RESET_N Asserted. Strap Setup Time Strap Hold Time. hub outputs driven to inactive logic states USB Attach (See Note). SMSC USB2502 Drive Strap Attach Outputs to USB Reset inactive recovery Upstream levels Driven by Hub if strap is an output. -
Page 34: Table 5.6 Reset_N Timing For Eeprom Mode
USB Reset recovery Set Options Upstream DATASHEET 2-Port USB 2.0 Hub Controller Datasheet UNITS msec undefined msec msec Section Chapter 7, "DC Start completion Idle request response UNITS μ sec μ sec 99.5 msec msec msec undefined msec msec SMSC USB2502... -
Page 35: Reset_N For Smbus Slave Configuration
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 Parameters", prior to (or coincident with) the assertion of RESET_N. SMSC USB2502 Attach SMBus Code Hub PHY... -
Page 36: Usb Bus Reset
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 USB2502 DATASHEET... -
Page 37: Chapter 6 Xnor Test
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 DATASHEET Revision 2.3 (08-27-07) -
Page 38: Chapter 7 Dc Parameters
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) UNITS °C °C (3.3V supply voltage + 2) ≤ 6 + 0.3V DD18 DATASHEET 2-Port USB 2.0 Hub Controller Datasheet COMMENTS Soldering < 10 seconds SMSC USB2502... -
Page 39: Recommended Operating Conditions
(IPU) Low Input Level High Input Level Low Input Leakage High Input Leakage Input Buffer with Pull-Down Low Input Level High Input Level Low Input Leakage High Input Leakage SMSC USB2502 UNITS °C 1.62 1.98 -0.3 -0.3 DDA33 -0.3 DD18 Table 7.1 DC Electrical Characteristics... - Page 40 = -4mA @ V CR = 3.3V DD33 = 0 to V DD33 (Note 1) = 12 mA @ V CR = 3.3V DD33 µA = 0 to V DD33 (Note 1) Total from all supplies Total from all supplies SMSC USB2502...
- Page 41 Capacitance Input Capacitance Output Capacitance Power Sequencing There are no power supply sequence restrictions for the Hub. The order in which power supplies power-up and power-down is implementation dependent. SMSC USB2502 UNITS = 3.3V DD33CR LIMITS UNIT All pins except USB pins (and pins under...
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Page 42: Chapter 8 Ac Specifications
External Clock: 50% Duty cycle ± 10%, 24 MHz ± 100ppm, Jitter < 100 ps 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 8.1.2 I2C EEPROM: Frequency is fixed at 59KHz ±... -
Page 43: Chapter 9 Package Outlines
Chapter 9 Package Outlines TERMINAL #1 IDENTIFIER AREA (D1/2 X E1/2) 0.6(MAX) 0.6(MAX) CHAMFERED CORNERS ARE OPTIONAL 4X TOP VIEW 4X 0°-12° ccc C 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 "b"... -
Page 44: Table 9.1 48 Pin Tqfp Package
0.08 DATASHEET 2-Port USB 2.0 Hub Controller Datasheet REMARKS Standoff Body Thickness X Span X body Size Y Span Y body Size Lead Foot Length Lead Length Lead Pitch Lead Foot Angle Lead Width Lead Foot Radius Coplanarity SMSC USB2502...
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