SMSC USB2507 User Manual

USB2507

Integrated USB 2.0

Compatible 7-Port Hub

PRODUCT FEATURES

Datasheet

Integrated USB 2.0 Compatible 7-Port Hub

—7 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 I2C 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

80-Pin TQFP lead-free RoHS compliant package

SMSC USB2507

DATASHEET

Revision 2.3 (08-27-07)

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

ORDER NUMBER:

USB2507-ADT FOR 80 PIN TQFP LEAD-FREE ROHS COMPLIANT PACKAGE

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

Copyright © 2007 SMSC or its subsidiaries. All rights reserved.

Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey to the purchaser of the described semiconductor devices any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal 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)	2	SMSC USB2507
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Table of Contents

Chapter 1 General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1 OEM Selectable Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Chapter 2	Pin Table 7-Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	7
Chapter 3	Pin Configuration 7-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	8
Chapter 4	7-Port Hub Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	9

Chapter 5 Functional Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1 7-Port Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.1 Hub Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

5.1.2 VBus Detect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2 EEPROM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2.1 I2C EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

5.2.2 In-Circuit EEPROM Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.2.3 EEPROM DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

5.3 SMBus Slave Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.3.1 Bus Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

5.3.2 Invalid Protocol Response Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.3.3 General Call Address Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

5.3.4 Slave Device Time-Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3.5 Stretching the SCLK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3.6 SMBus Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3.7 Bus Reset Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3.8 SMBus Alert Response Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.3.9 Internal SMBus Memory Register Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.4 Default Configuration Option: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.5 Default Strapping Options: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

5.6 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.6.1 External Hardware RESET_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

5.6.2 USB Bus Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Chapter 6 XNOR Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Chapter 7 DC Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.1 Maximum Guaranteed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

7.2 Recommended Operating Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Chapter 8 AC Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.1 Oscillator/Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.1.1 SMBus Interface: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.1.2 I2C EEPROM: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

8.1.3 USB 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Chapter 9 Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

SMSC USB2507	3	Revision 2.3 (08-27-07)
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

List of Figures

Figure 3.1 7-Port 80-Pin TQFP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4.1 7-Port Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 5.1 LED Strapping Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Figure 5.2 Reset_N Timing for Default/Strap Option Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Figure 5.3 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Figure 5.4 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Figure 9.1 80 Pin TQFP Package Outline (12x12x1.4 mm body - 2 mm footprint) . . . . . . . . . . . . . . . . . 44

Revision 2.3 (08-27-07)	4	SMSC USB2507
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

List of Tables

Table 2.1 7-Port Pin Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 4.1 7-Port Hub Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 4.2 SMBus or EEPROM Interface Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 4.3 Miscellaneous Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 4.4 Power, Ground, and No Connect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 4.5 Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 5.1 User-Defined Descriptor Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 5.2 SMBus Write Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 5.3 SMBus Read Byte Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Table 5.4 SMBus Slave Interface Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Table 5.5 Reset_N Timing for Default/Strap Option Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Table 5.6 Reset_N Timing for EEPROM Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Table 5.7 Reset_N Timing for SMBus Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Table 7.1 DC Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 Table 9.1 80 Pin TQFP Package Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

SMSC USB2507	5	Revision 2.3 (08-27-07)
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Chapter 1 General Description

The SMSC 7-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 7-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.

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 VBUS 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.

1.1OEM Selectable Features

A default configuration is available in the USB2507 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 USB2507 may also be configured by an external EEPROM or a microcontroller. When using the microcontroller interface, the Hub appears as an SMBus slave device. If the Hub is pin-strapped for external EEPROM configuration but no external EEPROM is present, then a value of ‘0’ will be written to all configuration data bit fields (the hub will attach to the host with all ‘0’ values).

The 7-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).

Optional OEM configuration via I2C EEPROM or via the industry standard SMBus interface from an external SMBus Host.

LED indicator support.

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

LED support MTT enable

Ganged Vs Port power switching and over-current sensing

Revision 2.3 (08-27-07)	6	SMSC USB2507
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Chapter 2 Pin Table 7-Port

Table 2.1 7-Port Pin Table

UPSTREAM USB 2.0 INTERFACE (3 PINS)

USBDP0	USBDN0		VBUS_DET
	7-PORT USB 2.0 INTERFACE (44 PINS)
USBDP1	USBDN1		USBDP2	USBDN2
USBDP3	USBDN3		USBDP4	USBDN4
USBDP5	USBDN5		USBDP6	USBDN6
USBDP7	USBDN7
GR1/	GR2/		GR3/	GR4/
NON_REM0	NON_REM1		PRT_DIS0	PRT_DIS1
GR5	GR6		GR7
AM1/	AM2/		AM3	AM4/
GANG_EN	MTT_EN			LED_EN
AM5	AM6		AM7
PRTPWR1	PRTPWR2		PRTPWR3	PRTPWR4
PRTPWR5	PRTPWR6		PRTPWR7
OCS1_N	OCS2_N		OCS3_N	OCS4_N
OCS5_N	OCS6_N		OCS7_N
PRTPWR_POL	RBIAS
	SERIAL PORT INTERFACE (3 PINS)
SDA/SMBDATA	SCL/SMBCLK/		CFG_SEL1
	CFG_SEL0
	MISC (8 PINS)
XTAL1/CLKIN	XTAL2		RESET_N	SELF_PWR
ATEST/	CLKIN_EN		TEST1	TEST0
REG_EN
	POWER, GROUND (22 PINS)

SMSC USB2507	7	Revision 2.3 (08-27-07)
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Chapter 3 Pin Configuration 7-Port Hub

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Figure 3.1 7-Port 80-Pin TQFP

Revision 2.3 (08-27-07)	8	SMSC USB2507
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Chapter 4 7-Port Hub Block Diagram

										To
									Pin	EEPROM
										or SMBus
Upstream	Upstream		24 MHz	3.3V		1.8V Strapping
USB Data		VBUS	Crystal			Cap		Options		Master
										SD SCL
		VBUS	PLL	1.8V				Internal		Serial
								Defaults
Upstream		Power		Reg.				Select		Interface
		Detect
PHY
Repeater				SIE					Controller
			TT	TT		...	TT		Port
			#1	#2				#7	Controller
		Routing Logic
		Port #1							Port #7
Downstream		OC Sense			Downstream				OC Sense
PHY #1		Switch Driver ...				PHY #7			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 7-Port Block Diagram
	Table 4.1 7-Port Hub Pin Descriptions
NAME	SYMBOL	TYPE						FUNCTION
		UPSTREAM USB 2.0 INTERFACE
USB Bus Data	USBDN0	IO-U			These pins connect to the upstream USB bus data signals.
	USBDP0
Detect Upstream	VBUS_DET	I/O12			Detects state of Upstream VBUS power. The SMSC Hub
VBUS Power					monitors VBUS_DET to determine when to assert the
					internal D+ pull-up resistor (signalling a connect event).
					When designing a detachable hub, this pin must be
					connected to the VBUS power pin of the USB port that is
					upstream of the hub. (Use of a weak pull-down resistor is
					recommended.)
					For self-powered applications with a permanently attached
					host, this pin must be pulled-up to either 3.3V or 5.0V
					(typically VDD33).

SMSC USB2507	9	Revision 2.3 (08-27-07)
	DATASHEET

			Integrated USB 2.0 Compatible 7-Port Hub
			Datasheet
	Table 4.1 7-Port Hub Pin Descriptions (continued)
NAME	SYMBOL	TYPE	FUNCTION
		7-PORT USB 2.0 HUB INTERFACE
High-Speed USB	USBDN[7:1]	IO-U	These pins connect to the downstream USB peripheral
Data	USBDP[7:1]		devices attached to the Hub’s ports.
USB Power	PRTPWR[7:1]	O12	Enables power to USB peripheral devices (downstream).
Enable			The active signal level of the PRTPWR7:1 pins is
			determined by the Power Polarity Strapping function of the
			PRTPWR_POL pin.
Ports [7:5] Green	GR[7:5]	I/O12	Green indicator LED’s for ports[7:5]. LED is active low
LED
Port 4:3 Green	GR[4:3]/	I/O12	Green indicator LED for ports 4 and 3. Will be active low
LED	PRT_DIS[1:0]		when LED support is enabled via EEPROM or SMBus.
&			If the hub is configured by the internal default configuration,
Port Disable
			these pins will be sampled at RESET_N negation to
strapping option.
			determine if ports [7:5] will be permanently disabled. Also,
			the active state of the LED’s will be determined as follows:
			PRT_DIS[1:0] = ‘00’, All ports are enabled,
			GR4 is active high,
			GR3 is active high.
			PRT_DIS[1:0] = ‘01’, Port 7 is disabled,
			GR4 is active high,
			GR3 is active low.
			PRT_DIS[1:0] = ‘10’, Ports 7 & 6 are disabled,
			GR4 is active low,
			GR3 is active high.
			PRT_DIS[1:0] = ‘11’, Ports 7, 6 & 5 are disabled,
			GR4 is active low,
			GR3 is active low.
Port [2:1] Green	GR[2:1]/	I/O12	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.
&			If the hub is configured by the internal default configuration,
Port Non-
			these pins will be sampled at RESET_N negation to
Removable
			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_REM[1:0] = ‘01’, Port 1 is non-removable,
			GR2 is active high,
			GR1 is active low.
			NON_REM[1:0] = ‘10’, Ports 1 & 2 are non-removable,
			GR2 is active low,
			GR1 is active high.
			NON_REM[1:0] = ‘11’, Ports 1, 2, & 3 are non-removable,
			GR2 is active low,
			GR1 is active low.
Ports [7:5] Amber	AM[7:5]	I/O12	Amber indicator LED’s for ports [7:5], LED is active low.
LED

Revision 2.3 (08-27-07)	10	SMSC USB2507
	DATASHEET

Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Table 4.1 7-Port Hub Pin Descriptions (continued)

NAME	SYMBOL	TYPE	FUNCTION
Port 4 Amber	AM4/	I/O12	Amber indicator LED for port 4. Will be active low when LED
LED	LED_EN		support is enabled via EEPROM or SMBus.
&			If the hub is configured by the internal default configuration,
LED Enable
			this pin will be sampled at RESET_N negation to determine
strapping option
			if LED support is enabled or disabled. Also, the active state
			of the LED will be determined as follows:
			‘0’ = LED support is disabled, LED is inactive
			‘1’ = LED Support is enabled, LED is active low.
Port 3 Amber	AM3	I/O12	Amber indicator LED for port 3. Signal will be active low.
LED
Port 2 Amber	AM2/	I/O12	Amber indicator LED for port 2. Will be active low when LED
LED	MTT_EN		support is enabled via EEPROM or SMBus.
&			If the hub is configured by the internal default configuration,
MTT Disable
			this pin will be sampled at RESET_N negation to determine
			if MTT support is disabled (STT only). Also, the active state
			of the LED will be determined as follows:
			‘0’ = MTT support is disabled, LED is active high
			‘1’ = MTT support is enabled, LED is active low.
Port 1 Amber	AM1/	I/O12	Amber indicator LED for port 1, Will be active low when LED
LED	GANG_EN		support is enabled via EEPROM or SMBus.
&			If the hub is configured by the internal default configuration,
Gang Power
			this pin will be sampled at RESET_N negation to determine
Switching and
			if downstream port power switching and current sensing are
Current Sensing
			ganged, or individual port-by-port. Also, the active state of
strapping option.
			the LED will be determined as follows:
			‘0’ = Port-by-port sensing & switching, LED is active high
			‘1’ = Ganged sensing & switching, LED is active low.
Port Power	PRTPWR_POL	I/O12	Port Power Polarity strapping determination for the active
Polarity strapping.			signal polarity of the 7:1PRTPWR 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 7:1PRTPWR pins in order to ensure
			that downstream port power is not inadvertently enabled to
			inactive ports during a hardware reset.
			On the rising edge of RESET_N (see the applicable
			RESET_N timing table in Section 5.6.1), the logic value will
			be latched internally, and will retain the active signal polarity
			for the PRTPWR7:1 pin.
			‘1’ = PRTPWR7:1 pins have an active ‘high’ polarity
			‘0’ = PRTPWR7:1 pins have an active ‘low’ polarity
Over Current	OCS7:1_N	IPU	Input from external current monitor indicating an over-
Sense			current condition. {Note: Contains internal pull-up to 3.3V
			supply}
USB Transceiver	RBIAS	I-R	A 12.0kΩ (+/− 1%) resistor is attached from ground to this
Bias			pin to set the transceiver’s internal bias settings.

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											Integrated USB 2.0 Compatible 7-Port Hub
											Datasheet
				Table 4.1 7-Port Hub Pin Descriptions (continued)
NAME				SYMBOL				TYPE			FUNCTION
								SERIAL PORT INTERFACE
Serial Data/SMB				SDA/SMBDATA				IOSD12		(Serial Data)/(SMB Data) signal.
Data
Serial Clock/SMB				SCL/SMBCLK/				IOSD12		(Serial Clock)/(SMB Clock) signal. This multifunction pin is
Clock				CFG_SEL0						read on the rising edge of RESET_N (see the applicable
&										RESET_N timing table in Section 5.6.1) and will determine
Config Select 0										the hub configuration method as described in Table 4.2.
Configuration				CFG_SEL1				I		This multifunction pin is read on the rising edge of
Programming										RESET_N (see the applicable RESET_N timing table in
Select										Section 5.6.1) and will determine the hub configuration
										method as described in Table 4.2.
				Table 4.2 SMBus or EEPROM Interface Behavior
			CFG_SEL1			CFG_SEL0			SMBus or EEPROM interface behavior.
			0					0	Reserved
			0					1	Configured as an SMBus slave for external download of user-
									defined descriptors. SMBus slave address is 0101100
			1					0	Internal Default Configuration via strapping options.
			1					1	2-wire (I2C) EEPROMS are supported,
								Table 4.3 Miscellaneous Pins
NAME				SYMBOL				TYPE			FUNCTION
Crystal				XTAL1/				ICLKx			24MHz crystal or external clock input.
Input/External				CLKIN							This pin connects to either one terminal of the crystal or
Clock Input											to an external 24MHz clock when a crystal is not used.
Crystal Output				XTAL2				OCLKx			24MHz Crystal
											This is the other terminal of the crystal, or left
											unconnected when an external clock source is used to
											drive XTAL1/CLKIN. It must not be used to drive any
											external circuitry other than the crystal circuit.
Clock Input				CLKIN_EN				I			Clock In Enable:
Enable											Low = XTAL1 and XTAL2 pins configured for use with
											external crystal
											High = XTAL1 pin configured as CLKIN, and must be
											driven by an external CMOS clock.
RESET Input				RESET_N				IS			This active low signal is used by the system to reset the
											chip. The minimum active low pulse is 1us.
Self-Power /				SELF_PWR				I			Detects availability of local self-power source.
Bus-Power											Low = Self/local power source is NOT available (i.e., Hub
Detect											gets all power from Upstream USB VBus).
											High = Self/local power source is available.
TEST Pins				TEST[1:0]				IPD			Used for testing the chip. User must treat as a no-
											connect or connect to ground.

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Integrated USB 2.0 Compatible 7-Port Hub

Datasheet

Table 4.3 Miscellaneous Pins (continued)

NAME	SYMBOL	TYPE	FUNCTION
Analog Test	ATEST/	AIO	This signal is used for testing the analog section of the
&	REG_EN		chip, and to enable or disable the internal 1.8v regulator.
Internal 1.8V			This pin must be connected to VDDA33 to enable the
voltage
			internal 1.8V regulator, or to VSS to disable the internal
regulator
			regulator.
enable
			When the internal regulator is enabled, the 1.8V power
			pins must be left unconnected, except for the required
			bypass capacitors.When the PHY is in test mode, the
			internal regulator is disabled and the ATEST pin
			functions as a test pin.

Table 4.4 Power, Ground, and No Connect

NAME	SYMBOL	TYPE	FUNCTION
VDDCORE3P3	VDD33CR		+3.3V I/O Power.
			If the internal core 1.8V regulator is enabled, then this pin
			acts as the regulator input
VDD1P8	VDD18		+1.8V core power.
			If the internal regulator is enabled, then VDD18 pin 50
			must have a 4.7μF (or greater) ±20% (ESR <0.1Ω)
			capacitor to VSS
VDDAPLL3P3	VDDA33PLL		+3.3V Filtered analog power for the internal PLL
			If the internal PLL 1.8V regulator is enabled, then this pin
			acts as the regulator input
VDDAPLL1P8	VDDA18PLL		+1.8V Filtered analog power for internal PLL.
			If the internal regulator is enabled, then this pin must
			have a 4.7μF (or greater) ±20% (ESR <0.1Ω) capacitor
			to VSS
VDDIO3P3	VDD33		+3.3V I/O power.
VDDA3P3	VDDA33		+3.3V Filtered analog power.
VSS	VSS		Ground.
		Table 4.5 Buffer Type Descriptions
BUFFER			DESCRIPTION
I	Input.
IPD	Input, with a weak Internal pull-down.
IPU	Input, with a weak Internal pull-up.
IS	Input with Schmitt trigger.
O12	Output 12mA.

SMSC USB2507	13	Revision 2.3 (08-27-07)
	DATASHEET

	Integrated USB 2.0 Compatible 7-Port Hub
	Datasheet
	Table 4.5 Buffer Type Descriptions (continued)
BUFFER	DESCRIPTION
I/O12	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
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.
AIO	Analog Input/output. Per PHY test requirements.

Revision 2.3 (08-27-07)	14	SMSC USB2507
	DATASHEET