SMSC USB2512A User Manual

USB2512A

USB 2.0 Hi-Speed 2-Port

Hub Controller

PRODUCT FEATURES

Datasheet

General Description

The SMSC 2-Port Hub is a low power, OEM 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-/Hi-Speed Hub. The 2-Port Hub supports Low-Speed, FullSpeed, and Hi-Speed (if operating as a Hi-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 I2C EEPROM, or SMBus Slave Port

36-pin (6x6mm) QFN lead-free, RoHS compliant package

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

Customizable 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

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

SMSC USB2512A

DATASHEET

Revision 1.96 (07-11-08)

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

ORDER NUMBERS:

USB2512A-AEZG FOR 36 PIN, QFN LEAD-FREE ROHS COMPLIANT PACKAGE

80 ARKAY DRIVE, HAUPPAUGE, NY 11788 [phone], FAX [phone]

Copyright © 2008 SMSC or its subsidiaries. All rights reserved.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal 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 1.96 (07-11-08)	2	SMSC USB2512A
	DATASHEET

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

Table of Contents

Chapter 1	Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
Chapter 2	Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7

Chapter 3 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.1 PIN Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chapter 4 Configuration Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.1	2-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		13
	4.1.1	Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13
	4.1.2	VBus Detect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	13
4.2	EEPROM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		13
	4.2.1	Internal Register Set (Common to EEPROM and SMBus) . . . . . . . . . . . . . . . . . . . . . . .	13
	4.2.2	I2C EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	24
	4.2.3	In-Circuit EEPROM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	25
4.3	SMBus Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		25
	4.3.1	Bus Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	25
	4.3.2	Invalid Protocol Response Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	26
	4.3.3	General Call Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	26
	4.3.4	Slave Device Time-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	26
	4.3.5	Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
	4.3.6	SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
	4.3.7	Bus Reset Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
	4.3.8	SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
4.4	Default Configuration Option: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		27
4.5	Default Strapping Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		27
4.6	Reset . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
	4.6.1	Internal POR Hardware Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
	4.6.2	External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	28
	4.6.3	USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	30

Chapter 5 DC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.1 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.2 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Chapter 6 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.1 Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.1.1 SMBus Interface: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.1.2 I2C EEPROM: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.1.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Chapter 7 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

SMSC USB2512A	3	Revision 1.96 (07-11-08)
	DATASHEET

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

List of Figures

Figure 1.1 USB2512A 36-Pin QFN (Embedded Footprint) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2.1 USB2512A Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 4.1 Block Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 4.2 Block Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 4.3 Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Figure 4.4 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Figure 4.5 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Figure 5.1 Supply Rise Time Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Figure 6.1 Typical Crystal Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 6.2 Formula to find value of C1 and C2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 7.1 36-Pin QFN, 6x6mm Body, 0.5mm Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Revision 1.96 (07-11-08)	4	SMSC USB2512A
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USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

List of Tables

Table 3.1 USB2512A Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3.2 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 3.3 USB2512A Power, Ground, and No Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 3.4 USB2512A Buffer Type Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 4.1 Internal Default, EEPROM and SMBus Register Memory Map. . . . . . . . . . . . . . . . . . . . . . . . 13 Table 4.2 Port Remap Register for Ports 1 & 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 4.3 Reset_N Timing for Default/Strap Option Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Table 4.4 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Table 4.5 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Table 5.1 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Table 5.2 Pin Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

SMSC USB2512A	5	Revision 1.96 (07-11-08)
	DATASHEET

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

Chapter 1 Pin Configuration

		VBUS DET	RESET N	HS IND/CFG SEL1	SCL/SMBCLK/CFG SEL0	VDD33	SDA/SMBDATA/NON REM1	NC	NC	NC
		27	26	25	24	23	22	21	20	19
	SUSP_IND/LOCAL_PWR/NON_REM0	28								18	NC
	VDDA33	29								17	OCS2_N
	USBUP_DM	30			SMSC					16	PRTPWR2
	USBUP_DP	31								15	VDD33CR
					USB2512A
	XTAL2	32								14	VDD18
			Embedded Footprint
	XTAL1/CLKIN	33								13	OCS1_N
			(Top View QFN-36)
	VDD18PLL	34								12	PRTPWR1
					Thermal Slug
	RBIAS	35								11	TEST
			(must be connected to VSS)
	VDD33PLL	36								10	VDDA33
		1 2 3 4 5 6 7 8 9
		USBDN1 DM	USBDN1 DP	USBDN2 DM	USBDN2 DP	VDDA33	NC	NC	NC	NC

Indicates pins on the bottom of the device.

Figure 1.1 USB2512A 36-Pin QFN (Embedded Footprint)

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Datasheet

Chapter 2 Block Diagram

	To U pstream	U pstream U SB	24 M H z C rystal	To EEPR O M or
	V B U S	D ata		SM Bus M aster

			3.3V	1.8V	SD	SC K
			PLL		Serial
Bus-Pow er	Upstream				Interface
Detect/VB U S			1.8V Reg
	PHY
Pulse
	Repeater		SIE		Controller
			TT		Port
					Controller
	Routing & Port Re-O rdering Logic
		Port #1		Port #2
		O C		O C
	PHY#1	Sense	PHY#2	Sense
		Sw itch		Sw itch
		Driver		Driver
		LED		LED
		Drivers		Drivers

U SB D ata O C Sense	U SB D ata	O C Sense
D ow nstream Switch/LED	Downstream	Switch/LED
Drivers		Drivers

Figure 2.1 USB2512A Block Diagram

SMSC USB2512A	7	Revision 1.96 (07-11-08)
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USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

Chapter 3 Pin Descriptions

3.1PIN Descriptions

This section provides a detailed description of each signal. The signals are arranged in functional groups according to their associated interface.

The “N” symbol in the signal name indicates that the active, or asserted, state occurs when the signal is at a low voltage level. When “N” is not present before the signal name, the signal is asserted when at the high voltage level.

The terms assertion and negation are used exclusively. This is done to avoid confusion when working with a mixture of “active low” and “active high” signals. The term assert, or assertion, indicates that a signal is active, independent of whether that level is represented by a high or low voltage. The term negate, or negation, indicates that a signal is inactive.

Table 3.1 USB2512A Pin Descriptions

	QFN-36		BUFFER
SYMBOL	EMB		TYPE	DESCRIPTION
			UPSTREAM USB INTERFACES
USBUP_DP	31		IO-U	USB Bus Data
USBUP_DM	30			These pins connect to the upstream USB bus data signals such
				as the Host port or upstream Hub.
VBUS_DET	27		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 which signals 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.
				For self-powered applications with a permanently attached
				host, this pin must be connected to 3.3V (typically VDD33).
		DOWNSTREAM 2-PORT USB 2.0 INTERFACE
USBDN_DP[2:1]/	4		IO-U	Hi-Speed USB Data
&	2			These pins connect to the downstream USB peripheral devices
	3			attached to the Hub’s port.
USBDN_DM[2:1]/	1
PRTPWR[2:1]	16		O12	USB Power Enable
	12			Enables power to USB peripheral devices downstream.
				Note: The Hub supports active high power controllers only!
OCS[2:1]_N	17		IPU	Over-Current Sense
	13			Input from external current monitor indicating an over-current
				condition.
				{Note: Contains internal pull-up to 3.3V supply}

Revision 1.96 (07-11-08)	8	SMSC USB2512A
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Datasheet

Table 3.1 USB2512A Pin Descriptions (continued)

	QFN-36	BUFFER
SYMBOL	EMB	TYPE	DESCRIPTION
RBIAS	35	I-R	USB Transceiver Bias
			A 12.0kΩ (+/- 1%) resistor is attached from ground to this pin
			to set the transceiver’s internal bias settings.
		SERIAL PORT INTERFACE
SDA/	22	I/OSD12	Serial Data / SMB Data & Port Non-removable Strap Option
SMBDATA/			NON_REM1: Non-removable port strap
NON_REM1
			option.
			If this strap is enabled by package and configuration settings
			(see Table 3.2), this pin will be sampled (in conjunction
			with LOCAL_PWR/SUSP_IND/NON_REM0) at RESET_N
			negation to determine if ports [2:1] contain permanently
			attached (non-removable) devices:
			NON_REM[1:0] = ‘00’, All ports are removable.
			NON_REM[1:0] = ‘01’, Port 1 is non-removable.
			NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable.
			NON_REM[1:0] = ‘11’, Ports 1 & 2 are non-removable.
SCL/	24	I/OSD12	Serial Clock (SCL)
SMBCLK/			SMBus Clock (SMBCLK)
CFG_SEL0			Configuration Select_SEL0: The logic state of this multifunction
			pin is internally latched on the rising edge of RESET_N
			(RESET_N negation), and will determine the Hub configuration
			method as described in Table 3.2, "SMBus or EEPROM
			Interface Behavior".
HS_IND/	25	I/O12	Hi-Speed Upstream port indicator & Configuration
CFG_SEL1			Programming Select
			HS_IND: High Speed Indicator for upstream port connection
			speed.
			The active state of the LED will be determined as follows:
			CFG_SEL1 = ‘0’,
			HS_IND is active high,
			CFG_SEL1 = ‘1’,
			HS_IND is active low,
			‘Asserted’ = Hub is connected at HS
			‘Negated’ = Hub is connected at FS
			CFG_SEL1: The logic state of this pin is internally latched on
			the rising edge of RESET_N (RESET_N negation), and will
			determine the Hub configuration method as described in
			Table 3.2, "SMBus or EEPROM Interface Behavior".
			MISC
XTAL1/	33	ICLKx	Crystal Input/External Clock Input
CLKIN			24MHz crystal or external clock input.
			This pin connects to either one terminal of the crystal or to an
			external 24MHz clock when a crystal is not used.

SMSC USB2512A	9	Revision 1.96 (07-11-08)
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			USB 2.0 Hi-Speed 2-Port Hub Controller
			Datasheet
	Table 3.1 USB2512A Pin Descriptions (continued)
	QFN-36	BUFFER
SYMBOL	EMB	TYPE	DESCRIPTION
XTAL2	32	OCLKx	Crystal Output
			24MHz Crystal
			This is the other terminal of the crystal, or a NO CONNECT
			when an external clock source is used to drive XTAL1/CLKIN.
			Note: This output must not be used to drive any external
			circuitry other than the crystal circuit.
RESET_N	26	IS	RESET Input
			The system can reset the chip by driving this input low. The
			minimum active low pulse is 1 us.
			When the RESET_N pin is pulled to VDD33, the internal POR
			(Power on Reset) is enabled and no external reset circuitry is
			required. The internal POR holds the internal logic in reset until
			the power supplies are stable.
SUSP_IND/	28	I/O	Active/Suspend status LED or Local-Power & Non-removable
LOCAL_PWR/			Strap Option
NON_REM0			Suspend Indicator: Indicates USB state of the hub.
			‘negated’ = Unconfigured, or configured and in USB Suspend
			‘asserted’ = Hub is configured, and is active (i.e., not in
			suspend)
			Local Power: Detects availability of local self-power source.
			Low = Self/local power source is NOT available (i.e., Hub gets
			all power from Upstream USB VBus).
			High = Self/local power source is available.
			NON_REM0 Strap Option:
			If this strap is enabled by package and configuration settings
			(see Table 3.2), this pin will be sampled (in conjunction with
			NON_REM1) at RESET_N negation to determine if ports [2:1]
			contain permanently attached (non-removable) devices. Also,
			the active state of the LED
			will be determined as follows:
			NON_REM[1:0] = ‘00’, All ports are removable, and the LED is
			active high
			NON_REM[1:0] = ‘01’, Port 1 is non-removable, and the LED
			is active low
			NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable, and the
			LED is active high
			NON_REM[1:0] = ‘11’, Ports 1 & 2 are non-removable, and the
			LED is active low
TEST	11	IPD	TEST pin
			XNOR continuity tests all signal pins on the hub. Please contact
			your SMSC representative for a detailed description of how this
			test mode is enabled and utilized.

Revision 1.96 (07-11-08)	10	SMSC USB2512A
	DATASHEET

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

Table 3.2 SMBus or EEPROM Interface Behavior

CFG_SEL1		CFG_SEL0				SMBUS OR EEPROM INTERFACE BEHAVIOR
0		0			Internal Default Configuration
						Strap Options Enabled
0		1			Configured as an SMBus slave for external download of user-defined
					descriptors.
						SMBus slave address 58 (0101100x)
						Strap Options Disabled
						All Settings Controlled by Registers
1		0			Internal Default Configuration
						Strap Options Enabled
						Bus Power Operation
1		1			2-Wire I2C EEPROMS are supported.
						Strap Options Disabled
						All Settings Controlled by Registers
			Table 3.3 USB2512A Power, Ground, and No Connect
PACKAGE SYMBOL			36-QFN EMB			FUNCTION
VDD18			14			VDD Core
						This pin must have a 1.0μF (or greater) ±20% (ESR <0.1Ω) capacitor to
						VSS.
VDD33PLL			36			VDD 3.3 PLL Regulator Reference
						+3.3V power supply for the PLL. If the internal PLL 1.8V regulator
						is enabled, then this pin acts as the regulator input.
VDDPLL18			34			VDD PLL
						This pin must have a 1.0μF (or greater) ±20% (ESR <0.1Ω) capacitor to
						VSS.
VDDA33			5			VDD Analog I/O
			10			+3.3V Filtered analog PHY power, shared between adjacent ports.
			29
VDD33/VDD33CR			23			VDDIO/VDD 3.3 Core Regulator Reference
			15			+3.3V power supply for the Digital I/O
						If the internal core regulator is enabled, then VDD33CR acts as the
						regulator input.
NC			6			No Connect
			7			No trace or signal should be routed or attached to these pins.
			8
			9
			18
			19
			20
			21

SMSC USB2512A	11	Revision 1.96 (07-11-08)
	DATASHEET

USB 2.0 Hi-Speed 2-Port Hub Controller

Datasheet

3.2Buffer Type Descriptions

	Table 3.4 USB2512A Buffer Type Descriptions
BUFFER	DESCRIPTION
I	Input.
IPD	Input with internal weak pull-down resistor.
IPU	Input with internal weak pull-up resistor.
IS	Input with Schmitt trigger.
O12	Output 12mA.
OD12	Open drain with 12mA sink.
I/O12	Input/Output buffer with 12mA sink and 12mA source.
I/OSD12	Open drain with Schmitt trigger and 12mA sink. Must meet I2C-Bus Specification
	Version 2.1 requirements.
ICLKx	XTAL clock input.
OCLKx	XTAL clock output.
I-R	RBIAS.
I/O-U	Analog Input/Output Defined in USB specification.
AIO	Analog Input/Output.

Revision 1.96 (07-11-08)	12	SMSC USB2512A
	DATASHEET