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PRODUCT FEATURES
General Description
T h e S M S C 2 - P o r t H u b i s a l o w p o w e r, O E M
configurable, STT (Single transaction translator) hub
controller IC with 2 downstream ports for embedded
USB solutions. The 2-port hub is fully compliant with the
USB 2.0 Specification and will attach to an upstream
port 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.
General Features
Hub Controller IC with 2 downstream ports
Enhanced OEM configuration options available
through either a single serial I
SMBus Slave Port
36-pin (6x6mm) QFN lead-free, RoHS compliant
package
Supports industrial temperature range of -40ºC - 85ºC
Hardware Features
Low power operation
Full Power Management with individual or ganged
power control of each downstream port
On-chip Power On Reset (POR)
Internal 1.8V Voltage Regulator
Fully integrated USB termination and Pull-up/Pull-
down resistors
On Board 24MHz Crystal Driver, Resonator or
External 24MHz clock input
Enhanced EMI rejection and ESD protection
performance
OEM Selectable Features
Customize Vendor ID, Product ID, and Device ID
Select whether the hub is part of a compound device
(When any downstream port is permanently
hardwired to a USB peripheral device, the hub is part
of a compound device)
Flexible port mapping and disable sequence. Ports
can be disabled/reordered in any order to support
multiple product SKUs. Hub will automatically reorder
the remaining ports to match the Host controller's
numbering scheme.
Programmable USB differential-pair pin location.
Ease PCB layout by aligning USB signal lines directly
to connectors
SMSC USB2512i
2
C EEPROM, or
DATASHEET
USB2512i
Industrial Temperature
Rated USB 2.0 High-Speed
2-Port Hub Controller
Programmable USB signal drive strength. Recover
USB signal integrity due to compromised system
environment using 2-level driving strength resolution
Select the presence of a permanently hardwired USB
peripheral device on a port by port basis
Configure the delay time for filtering the over-current
sense inputs
Configure the delay time for turning on downstream
port power
Indicate the maximum current that the 2-port hub
consumes from the USB upstream port
Indicate the maximum current required for the hub
controller
Pin Selectable Options for Default Configuration
— Select Downstream Ports as Non-Removable Ports
Applications
LCD monitors and TVs
Multi-function USB peripherals
PC mother boards
Set-top boxes, DVD players, DVR/PVR
Printers and scanners
PC media drive bay
Portable hub boxes
Mobile PC docking
Embedded systems
Datasheet
Revision 1.92 (11-28-07)
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Table of Contents
Related Manuals for SMSC USB2512i
Summary of Contents for SMSC USB2512i
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Page 1: Product Features
Host controller's numbering scheme. Programmable USB differential-pair pin location. Ease PCB layout by aligning USB signal lines directly to connectors SMSC USB2512i USB2512i Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Programmable USB signal drive strength. Recover... - Page 2 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.
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Page 3: Table Of Contents
Chapter 7 Package Outline ........... 37 SMSC USB2512i DATASHEET Revision 1.92 (11-28-07) - Page 4 Figure 1.1 USB2512i 36-Pin QFN (Embedded Footprint) ........
- Page 5 Table 3.3 USB2512i Power, Ground, and No Connect ....... . .
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Page 6: Chapter 1 Pin Configuration
VDDA33 USBUP_DM USBUP_DP XTAL2 XTAL1/CLKIN VDD18PLL RBIAS VDD33PLL Figure 1.1 USB2512i 36-Pin QFN (Embedded Footprint) Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller SMSC USB2512i Embedded Footprint (Top View QFN-36) Thermal Slug (must be connected to VSS) Indicates pins on the bottom of the device. -
Page 7: Chapter 2 Block Diagram
O C S e nse S w itch /LE D D ow n strea m D rive rs Figure 2.1 USB2512i Block Diagram DATASHEET T o E E P R O M o r S M B u s M a ste r S C K 1 .8 V... -
Page 8: Chapter 3 Pin Descriptions
(Host port, or upstream hub). I/O12 Detect Upstream VBUS Power Detects state of Upstream VBUS power. The SMSC Hub monitors VBUS_DET to determine when to assert the internal D+ pull-up resistor (signaling 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 9 Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Table 3.1 USB2512i Pin Descriptions (continued) QFN-36 SYMBOL SDA/ SMBDATA/ NON_REM1 SCL/ SMBCLK/ CFG_SEL0 HS_IND/ CFG_SEL1 XTAL1/ CLKIN SMSC USB2512i BUFFER TYPE SERIAL PORT INTERFACE I/OSD12 Serial Data / SMB Data & Port Non Removable Strap Option NON_REM1: Non removable port strap option.
- Page 10 Table 3.1 USB2512i Pin Descriptions (continued) QFN-36 SYMBOL XTAL2 RESET_N SUSP_IND/ LOCAL_PWR/ NON_REM0 TEST Table 3.2 SMBus or EEPROM Interface Behavior CFG_SEL1 CFG_SEL0 Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller BUFFER TYPE OCLKx Crystal Output...
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Page 11: Table 3.2 Smbus Or Eeprom Interface Behavior
Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet Table 3.2 SMBus or EEPROM Interface Behavior (continued) CFG_SEL1 CFG_SEL0 Table 3.3 USB2512i Power, Ground, and No Connect PACKAGE SYMBOL 36-QFN EMB VDD18 VDD33PLL VDDPLL18 VDDA33 VDD33/VDD33CR SMSC USB2512i SMBUS OR EEPROM INTERFACE BEHAVIOR Configured as an SMBus slave for external download of user-defined descriptors. -
Page 12: Buffer Type Descriptions
Buffer Type Descriptions Table 3.4 USB2512i Buffer Type Descriptions BUFFER Input. Input with internal weak pull-down resistor. Input with internal weak pull-up resistor. Input with Schmitt trigger. Output 12mA. OD12 Open drain... 12mA sink. I/O12 Input/Output buffer with 12mA sink and 12mA source. -
Page 13: Chapter 4 Configuration Options
4.1.1 Hub Configuration Options The SMSC Hub supports a large number of features (some are mutually exclusive), 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 (with or without pin strapping option over-rides). - Page 14 This field is set by the OEM using either the SMBus or EEPROM interface options. DATASHEET Datasheet SMBUS AND INTERNAL EEPROM POR DEFAULT ROM VALUES 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 SMSC USB2512i...
- Page 15 Register 05h: Device ID (MSB) NUMBER BIT NAME DID_MSB SMSC USB2512i DESCRIPTION Most Significant Byte of the Vendor ID. This 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.
- Page 16 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 current prior to being configured. After configuration, the Bus-...
- Page 17 (and from Bus-Powered to Self- Powered if the local power source is restored). {Note: If the local power source is available, the 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 LOCAL_PWR pin.
- Page 18 Bit 5= Reserved, always = ‘0’ Bit 4= Reserved, always = ‘0’ Bit 3= Reserved, always = ‘1’ Bit 2= 1; Port 2 non-removable Bit 1= 1; Port 1 non removable Bit 0= Reserved, always = ‘0’ DATASHEET Datasheet SMSC USB2512i...
- Page 19 PORT_DIS_BP 4.2.1.13 Register 0Ch: Max Power For Self Powered Operation NUMBER BIT NAME SMSC USB2512i DESCRIPTION Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port is available, ‘1’ = port is disabled. when remapping mode is disabled...
- Page 20 (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. DATASHEET Datasheet SMSC USB2512i...
- Page 21 BIT NAME Reserved BOOST_IOUT_2 BOOST_IOUT_1 SMSC USB2512i DESCRIPTION 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.
- Page 22 Bit 6= Reserved Bit 5= Reserved Bit 4= Reserved Bit 3= Reserved Bit 2= ‘1’; Port 2 DP/DM is Swapped. Bit 1= ‘1’: Port 1 DP/DM is Swapped. Bit 0= ‘1’:Upstream Port DP/DM is Swapped Revision 1.92 (11-28-07) SMSC USB2512i DATASHEET...
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Page 23: Table 4.2 Port Remap Register For Ports 1 & 2
Register FBh: Port Remap 12 NUMBER BIT NAME PRTR12 SMSC USB2512i DESCRIPTION Port remap register for ports 1 & 2. When a hub is enumerated by a USB Host Controller, the hub is only permitted to report how many ports it has; the hub is not permitted to select a numerical range or assignment. -
Page 24: I2C Eeprom
USB Attach (and write protect) ‘0’ = SMBus slave interface is active ‘1’ = Hub will signal a USB attach event to an upstream device, and the internal memory (address range 00h-FEh) is “write-protected” to prevent unintentional data corruption. DATASHEET Datasheet SMSC USB2512i... -
Page 25: In-Circuit Eeprom Programming
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 26: Invalid Protocol Response Behavior
Figure 4.1 Block Write Register Address Data byte 2 Block Read Figure 4.2 Block Read Section 4.3.3 for the response to undefined registers. TIMEOUT, MAX DATASHEET Datasheet Data byte N Slave Address Data byte N ). Devices that TIMEOUT, MIN SMSC USB2512i... -
Page 27: Stretching The Sclk Signal
Please refer to Table 4.1 Default Strapping Options: The USB2512i can be configured via a combination of internal default values and pin strap options. Please see Table 3.1 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 &... -
Page 28: External Hardware Reset_N
Drive Strap Attach Outputs to USB Reset inactive recovery Upstream levels Driven by Hub if strap is an output. Don’t Care 16.7 16.7 DATASHEET Datasheet Start completion Idle request response UNITS μsec nsec 1400 nsec μsec msec msec SMSC USB2512i... -
Page 29: Figure 4.4 Reset_N Timing For Eeprom Mode
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 Parameters, prior to (or coincident with) the assertion of RESET_N. SMSC USB2512i Read EEPROM Attach USB Reset... -
Page 30: Usb Bus Reset
Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Attach SMBus Code Hub PHY USB Reset Load Stabilization Upstream DATASHEET Datasheet Start completion Idle recovery request response UNITS μsec μsec msec msec msec Undefined msec msec Chapter 5, DC SMSC USB2512i... - Page 31 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. SMSC USB2512i DATASHEET Revision 1.92 (11-28-07)
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Page 32: Chapter 5 Dc Parameters
Datasheet COMMENTS Soldering < 10 seconds COMMENTS If any 3.3V supply voltage drops b e l o w 3 . 0 V, t h e n t h e M A X becomes: (3.3V supply voltage) + 0.5 SMSC USB2512i... -
Page 33: Table 5.1 Dc Electrical Characteristics
High Input Level Input Leakage O12, I/O12 &I/OSD12 Type Buffer Low Output Level High Output Level Output Leakage Hysteresis (‘SD’ pad only) HYSC IO-U (Note 2) SMSC USB2512i UNITS -0.3 DDA33 -0.3 DD18 Table 5.1 DC Electrical Characteristics HYSI ILCK IHCK DATASHEET... - Page 34 2. See USB 2.0 Specification for USB DC electrical characteristics. Revision 1.92 (11-28-07) Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller UNITS All supplies combined All supplies combined μA All supplies combined μA All supplies combined DATASHEET Datasheet COMMENTS SMSC USB2512i...
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Page 35: Table 5.2 Pin Capacitance
Industrial Temperature Rated USB 2.0 High-Speed 2-Port Hub Controller Datasheet CAPACITANCE T PARAMETER SYMBOL Clock Input XTAL Capacitance Input Capacitance Output Capacitance SMSC USB2512i = 25°C; fc = 1MHz; V DD18 DDPLL Table 5.2 Pin Capacitance LIMITS UNIT DATASHEET = 1.8V TEST CONDITION... -
Page 36: Chapter 6 Ac Specifications
Figure 6.2 Formula to find value of C 6.1.1 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 6.1.2 I2C EEPROM: Frequency is fixed at 58.6KHz ±... -
Page 37: Chapter 7 Package Outline
Chapter 7 Package Outline Figure 7.1 36-Pin QFN, 6x6mm Body, 0.5mm Pitch...
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