SMSC USB2507 User Manual

USB2507
Integrated USB 2.0 Compatible 7-Port Hub
PRODUCT FEATURES
Integra ted 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
Co mplete 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
De fault VID/PID/DID, allows functionality when
configuration EEPROM is absent
Ha rdware Strapping options allow for configuration
without an external EEPROM or SMBus Host
,
Datasheet
On-Boa rd 24MHz Crystal Driver Circuit or 24 MHz
external clock driver
Interna l PLL for 480MHz USB 2.0 Sampling Interna l 1.8V Linear Voltage RegulatorInteg rated USB termination and Pull-up/Pull-down
resistors
Interna l Short Circuit protection of USB differential
signal pins
1 .8 Volt Low Power Core Operation3 .3 Volt I/O with 5V Input Tolerance8 0-Pin TQFP lead-free RoHS compliant package
SMSC USB2507 DATASHEET Revision 2.3 (08-27-07)
Integrated USB 2.0 Compatible 7-Port Hub
ORDER NUMBER:
USB2507-ADT FOR 80 PIN TQFP LEAD-FREE ROHS COMPLIANT PACKAGE
Datasheet
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 mean s of illustrating typical applications. Conse quently, 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 da ted 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

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.
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
The Hub works with an external USB power distribution switch device to control V 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 seri es termination resistors on D+ and D– pins and all require d 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 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 ho st 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 operate s as a Bus-Powered device if a local power
source is not available and switches to Self-Powered opera tion 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 down strea m USB perip heral device).Hardware strapping options enable configuration of the following feature s.
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
switching to
BUS
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/
NON_REM0
GR5 GR6 GR7
AM1/
GANG_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
SDA/SMBDATA SCL/SMBCLK/
XTAL1/CLKIN XTAL2 RESET_N SELF_PWR
ATEST/
REG_EN
GR2/
NON_REM1
AM2/
MTT_EN
SERIAL PORT INTERFACE (3 PINS)
CFG_SEL0
MISC (8 PINS)
CLKIN_EN TEST1 TEST0
GR3/
PRT_DIS0
AM3 AM4/
CFG_SEL1
GR4/
PRT_DIS1
LED_EN
POWER, GROUND (22 PINS)
SMSC USB2507 7 Revision 2.3 (08-27-07)
DATASHEET
Integrated USB 2.0 Compatible 7-Port Hub

Chapter 3 Pin Configuration 7-Port Hub

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Datasheet
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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

Upstream USB Data
Upstream
V
BUS
24 MHz
Crystal
3.3V
1.8V Cap
Pin
Strapping
Options
To EEPROM or SMBus
Master
SCLSD
Upstream
PHY
Repeater
Downstream
PHY #1
Downstream
USB DataOCSense
Power
Detect

Figure 4.1 7-Port Block Diagram

V
BUS
Switch Driver
LED Drivers
PLL
Routing Logic
Port #1
OC Sense
Switch/LED
Drivers
TT#1TT
#2
...
1.8V Reg.
SIE
TT
...
#7
Downstream
PHY #7
Downstream
USB DataOCSense
Internal
Defaults
Select
Controller
Port
Controller
Port #7
OC Sense
Switch Driver
LED Drivers
Serial
Interface
Switch/LED
Drivers

Ta ble 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 Power
VBUS_DET I/O12 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. (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
Table 4.1 7-Port Hub Pin Descriptions (continued)
NAME SYMBOL TYPE FUNCTION
7-PORT USB 2.0 HUB INTERFACE
Datasheet
High-Speed USB
Data
USB Power
Enable
Ports [7:5] Green
LED
Port 4:3 Green
LED
&
Port Disable
strapping option.
USBDN[7:1] USBDP[7:1]
IO-U These pins connect to the downstream USB peripheral
devices attached to the Hub’s ports.
PRTPWR[7:1] O12 Enables power to USB peripheral devices (downstream).
The active signal level of the PRTPWR7:1 pins is determined by the Power Polarity Strapping function of the PRTPWR_POL pin.
GR[7:5] I/O12 Green indicator LED’s for ports[7:5]. LED is active low
GR[4:3]/
PRT_DIS[1:0]
I/O12 Green indicator LED for ports 4 and 3. Will be active low
when LED support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration,
these pins will be sampled at RESET_N negation to 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.
Port [2:1] Green
LED
&
Port Non-
Removable
strapping option.
Ports [7:5] Amber
LED
PRT_DIS[1:0] = ‘11’, Ports 7, 6 & 5 are disabled, GR4 is active low, GR3 is active low.
GR[2:1]/
NON_REM[1:0]
I/O12 Green indicator LED for ports 2 and 1. Will be active low
when LED support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration,
these pins will be sampled at RESET_N negation to determine if ports [3:1] contain permanently attached (non­removable) 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.
AM[7:5] I/O12 Amber indicator LED’s for ports [7:5], LED is active low.
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Datasheet
Table 4.1 7-Port Hub Pin Descriptions (continued)
NAME SYMBOL TYPE FUNCTION
Port 4 Amber
LED
&
LED Enable
strapping option
Port 3 Amber
LED
Port 2 Amber
LED
&
MTT Disable
Port 1 Amber
LED
&
Gang Power
Switching and
Current Sensing
strapping option.
AM4/
LED_EN
I/O12 Amber indicator LED for port 4. Will be active low when LED
support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration,
this pin will be sampled at RESET_N negation to determine 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.
AM3 I/O12 Amber indicator LED for port 3. Signal will be active low.
AM2/
MTT_EN
I/O12 Amber indicator LED for port 2. Will be active low when LED
support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration,
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 l ow.
AM1/
GANG_EN
I/O12 Amber indicator LED for port 1, Will be active low when LED
support is enabled via EEPROM or SMBus. If the hub is configured by the internal default configuration,
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. Also, the active state of the LED will be determined as follows:
Port Power
Polarity strapping.
Over Current
Sense
USB Transceiver
Bias
‘0’ = Port-by-port sensing & switching, LED is active high ‘1’ = Ganged sensing & switching, LED is active low.
PRTPWR_POL I/O12 Port Power Polarity strapping determination for the active
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 logi c 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
OCS7:1_N IPU Input from external current monitor indicating an over-
current condition. {Note: Contains internal pull-up to 3.3V supply}
RBIAS I-R A 12.0kΩ (+/− 1%) resistor is attached from ground to this
pin to set the transceiver’s internal bias settings.
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Integrated USB 2.0 Compatible 7-Port Hub
Table 4.1 7-Port Hub Pin Descriptions (continued)
NAME SYMBOL TYPE FUNCTION
SERIAL PORT INTERFACE
Datasheet
Serial Data/SMB
Data
Serial Clock/SMB
Clock
&
Config Select 0
Configuration Programming
Select
SDA/SMBDATA IOSD12 (Serial Data)/(SMB Data) signal.
SCL/SMBCLK/
CFG_SEL0
IOSD12 (Serial Clock)/(SMB Clock) signal. This multifunction pin is
read on the rising edge of RESET_N (see the applicable RESET_N timing table in Section 5.6.1) and will dete rmine the hub configuration method as described in Table 4.2.
CFG_SEL1 I This multifunction pin is read on the risi ng edge of
RESET_N (see the applicable RESET_N timing table in
Section 5.6.1) and will determine the hub config uration
method as described in Table 4.2.

Table 4.2 SMBus or EEPROM Interface Behavior

CFG_SEL1 CFG_SEL0 SMBus or EEPROM interface behavior.
00Reserved 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
Input/External
Clock Input
XTAL1/
CLKIN
ICLKx 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.
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 I 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 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 /
Bus-Power
Detect
SELF_PWR I 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.
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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Table 4.3 Miscellaneou s Pin s (continued)
NAME SYMBOL TYPE FUNCTION
Analog Test
&
Internal 1.8V
voltage
regulator
enable
ATEST/
REG_EN
AIO This signal is used for testing the analog section of the
chip, and to enable or disable the internal 1.8v regulator. This pin must be connected to VDDA33 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
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.
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DATASHEET
Table 4.5 Buffer Type Descriptions (continued)
BUFFER DESCRIPTION
I/O12 Input/Output, 12mA
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
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.
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Datasheet

Chapter 5 Functional Block Description

5.1 7-Port Hub

SMSC’s USB 2.0 7-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 7-Port Hub provides 1 Transaction Translator (TT) per port (defined as Multi-TT configuration), divided into 4 non-peri odic buffers per TT.

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.
5.1.1.1 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) wil l be reported.
5.1.1.2 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.
5.1.1.3 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.
5.1.1.4 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 current 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, <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.
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5.1.1.5 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. When using the internal default option, the LED_EN pin enables/disables LED Indicator support.
5.1.1.6 High-Speed Disable
Allows an OEM to force the Hub to configure as a Full-Speed device only (i.e. High-Speed not available).
This field is set by the OEM using either the SMBus or EEPROM interface options.
5.1.1.7 Multiple-TT Support
Selects between a mode where only one transaction translator is avail able 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. When using the internal default option, the MTT_EN pin enables/disables MTT support.
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
5.1.1.8 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.
5.1.1.9 Current Sensing
Selects current sensing on a port-by-port basis, all ports ganged, or none. 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 det ermines if current sensing will be ganged, or none (ganged if self-powered, none if bus-powered)
5.1.1.10 Downstream Port Power Enabling
Enables all ports simultaneously (ganged), or port power is individually switched on and off on a port­by-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 interface options. When using the internal default option, the GANG_EN pin will confi gure the hub for ganged or individual port-by-port port power switching.
5.1.1.11 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 defin ed 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 automa tically causes
the hub controller to report that it is part of a compound device.
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5.1.1.12 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.)
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 non­removable.
5.1.1.13 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 decreasing order starting with port 7.
This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the PRT_DIS[1:0] pins will disable the appropriate ports.
5.1.1.14 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 C ontroller. The disabled ports must be contiguous, and must be in decreasing order starting with port 7.
This field is set by the OEM using either the SMBus or EEPROM interface options. When using the internal default option, the PRT_DIS[1:0] pins will disable the appropriate ports.
5.1.1.15 Dynamic Power
Controls the ability of the 7-Port Hub to automatically change from Self-Powered operation to Bus­Powered operation if the local power source is removed or is unavailable (and from Bu s-Powered to Self-Powered if the local power source is restored). {Note: If the local power source is available, the 7-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-Powered Hub (if local power is available).
This field is set by the OEM using either the SMBus or EEPROM interface options.
5.1.1.16 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.
5.1.1.17 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.
5.1.1.18 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.
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5.1.1.19 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.
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 powered-on port.
This field is set by the OEM using either the SMBus or EEPROM interface options.
5.1.1.22 Power Switching Polarity
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
The selection of active state “polarity” for the PRTPWR[7:1] pins is made by a strapp ing 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 with in 10 seconds.

5.2 EEPROM Interface

The SMSC Hub can be configured via a 2-wire (I2C) EEPROM. (Please see Table 4.1, "7-Port Hub
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. The hub will then “attach” to the upstream USB host.
Please see Table 5.1 User-Define d Descriptor Data for a list of data fields available.

5.2.1 I2C EEPROM

The I2C EEPROM interface implements a subset of the I2C Master Specification (Please refer to the Philips Semiconductor Standard I2C-Bus Specification for details on I2C bus protocols). The Hub’s I2C EEPROM interface is designed to attach to a single “dedicated” I2C EEPROM, and it conforms to the Standard-mode I2C Specification (100kbit/s transfer rate and 7-bit addressing) for protocol and electrical compatibility.
Note: Extension s to the I2C Specification are not supported. The Hub acts as the master and generates the serial clock SCL, contro ls the bus access (determines
which device acts as the transmitter and which device acts as the receiver), and generates the START and STOP conditions.
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5.2.1.1 Implementation Characteristics
Please refer to the MicroChip 24AA00 DataSheet for Protocol and Progra mming specifics.
5.2.1.2 Pull-Up Resistor
The Circuit board designer is required to place external pull-up resistors (10K Ω recommended) on the SDA/SMBDATA & SCL/SMBCLK/CFG_SELO lines (per SMBus 1.0 Specification, and EEPROM manufacturer guidelines) to Vcc in order to assure proper operation.
5.2.1.3 I2C EEPROM Slave Address
Slave address is 1010000.
Note: 10-b it 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-De fined Descriptor Data
DEFAULT BYTE MSB:
FIELD
VID 1:0 2 0424 04 24 Vendor ID (assigned by USB-IF). PID 3:2 2 2507 25 07 Product ID (assigned by Manufacturer).
DID 5:4 2 0000 0000 Device ID (assigned by Manufacturer). Config Data
Byte 1 Config Data
Byte 2 Non
Removable Device
Port Disable Self-Powered
Port Disable Bus-Powered
Max Power Self-Powered
LSB
6 1 98 1C Configuration data byte #1 for Hub options.
7 1 10 90 Configuration data byte #2 for Hub options.
8 1 00 00 Defines the ports that contain attached
9 1 00 00 Selects the ports that will be permanently
A 1 00 00 Selects the ports that will be permanently
B 1 01 01 Max Current for this configuration (expressed
SIZE
(BYTES)
CFG
SELF
(HEX)
DEFAULT
CFG BUS
(HEX) DESCRIPTION
devices (this is used only when Hub is part of a compound device).
disabled
disabled
in 2mA units).
Max Power Bus-Powered
Hub Controller Max Current Self-Powered
SMSC USB2507 19 Revision 2.3 (08-27-07)
C 1 64 64 Ma x Current for th is configur ation (exp re ssed
in 2mA units).
D 1 01 01 Ma x Current (expressed in 2mA units).
DATASHEET
Integrated USB 2.0 Compatible 7-Port Hub
Table 5.1 User-Defined Descriptor Data (continued)
Datasheet
FIELD
Hub Controller Max Current Bus-Powered
Power-On Time
DEFAULT BYTE MSB:
LSB
E 1 64 64 Max Current (expressed in 2mA units).
F 1 32 32 Time until power is stable.
SIZE
(BYTES)
CFG
SELF
(HEX)
DEFAULT
CFG BUS
(HEX) DESCRIPTION
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 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.
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Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
BIT
NUMBER BIT NAME DESCRIPTION
5 HS_DISABLE High Speed Disable: Disables the capability to attach as either a High/Full-
4 MTT_ENABLE Multi-TT enabl e: Enables one transaction translator per port operation.
3 EOP_DISABLE EOP Disable: Disables EOP gene ration at EOF1 when no downstream
2:1 CURRENT_SNS Over Current Sense: Indicates whether current sensing is on a port-by-port
0 PORT_PWR Port Power Switching: Indicates whether port power switching is on a port-
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!)
0 = single TT for all ports. 1 = one TT per port (multiple TT’s supported)
directed traffic is in progress. 0 = EOP generation at EOF1 is enabled.
1 = EOP generation at EOF1 is disabled, (normal operation). (Default)
basis, or ganged. 00 = Ganged sensing (all ports together). (Default for self-power)
01 = Individual port-by-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-
6 Reserved Reserved
5:4 OC_TIMER OverCurrent Timer: Over Current Timer delay.
3 COMPOUND Compound Device: Designate s if Hub is part of a compound device.
2:0 Reserved Reserved.
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)
00 = 0.1ms 01 = 2ms (Default) 10 = 4ms 11 = 6 m s
0 = No. (Default) 1 = Yes, Hub is part of a compound device.
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Integrated USB 2.0 Compatible 7-Port Hub
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= 1; Port 7 non-removable.
Bit 6= 1; Port 6 non-removable. Bit 5= 1; Port 5 non removable. Bit 4= 1; Port 4 non-removable. 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
Datasheet
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= 1; Port 7 is disabled. Bit 6= 1; Port 6 is disabled. Bit 5= 1; Port 5 is disabled. Bit 4= 1; Port 4 is disabled. Bit 3= 1; Port 3 is disabled. Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 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= 1; Port 7 is disabled. Bit 6= 1; Port 6 is disabled. Bit 5= 1; Port 5 is disabled. Bit 4= 1; Port 4 is disabled. Bit 3= 1; Port 3 is disabled. Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = ‘0’
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Integrated USB 2.0 Compatible 7-Port Hub
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 combi ned 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 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.
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 combi ned 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 0mA 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 self­powered 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 100mA
A value of 50 (decimal) indicates 100mA, which is the default value.
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5.2.3.12 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 self­powered 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.
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 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 & CFG_SEL0 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 5.3.2, "In valid Protocol Response Behavior," on
page 25. 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 26.

5.3.1 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 th e contents of the register that the host is attempting to read.
Note: Data bytes are transferred MSB first (msb fi rst).
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5.3.1.1 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 SMBus 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 th e following SMBus tables:
Denotes Master-to-Slave Denotes Slave-to-Master
Write B yte 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
Field: Start Slave Addr Wr
Bits:1 71181811
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
Field: Start Slave
Addr
Bits: 1 7 1 1 8 1 1 7 1 1 8 1 1
Wr Ack Reg.
Ack Reg. Addr Ack Reg. Data Ack Stop
Addr
Ack Start Slave
Addr
Rd Ack Reg.
Data
Nack Stop

5.3.2 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 responds 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.

5.3.3 General Call Address Response

The Hub does not respond to a general call address of 0000 _000b.
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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 exceed s 25ms (T have detected this condition must reset their communication and be able to receive a new START condition no later than 35ms (T
Note: Some simple devices do not contain a clock low drive ci rcuit; this si mple kind of device typica lly
resets its communications port after a start or stop condition.
TIMEOUT, MAX

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” section.

5.3.7 Bus Reset Sequence

Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
TIMEOUT, MIN
).
). Devices that
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
ADDR R/W REGISTER NAME ABBR
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 02hR/WVID MSB VIDM7 6543210 03h R/W PID LSB PIDL 7 6 5 4 3 2 1 0 04hR/WPID MSB PIDM7 6543210 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
BIT 7
(MSB) BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1
BIT 0 (LSB)
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
Devices 0Ah R/W Port Disable (Self) PDS 7 6 5 4 3 2 1 0 0Bh R/W Port Disable (Bus) PDB 7 6 5 4 3 2 1 0
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Table 5.4 SMBus Slave Interface Register Map (continued)
REG
ADDR R/W REGISTER NAME ABBR
BIT 7
(MSB) BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1
0Ch R/W Max Power (Self) MAXPS 7 6 5 4 3 2 1 0 0Dh R/W Max Power (Bus) MAXPB 7 6 5 4 3 2 1 0 0Eh R/W Hub Controller
HCMCS 7 6 5 4 3 2 1 0
Max Current (Self)
0Fh 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 cle ared to its default value of 0.}
0 = Normal Run/Idle State. 1 = Force a reset.
BIT 0 (LSB)
1 WRITE_PROT Write Protect: Th e external SMBus ho st 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 no t write protected. 1 = The internal memory (address range 01-10h) is “write-prote cted” 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 & 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 external 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.
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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.
Datasheet
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 Significa nt 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 from self or bus power.
6 PORT_IND Port Indicator Support: Indicates implementation of LED indicato rs
0 = No LED indicators. 1 = LED indicators.
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BIT
NUMBER BIT NAME DESCRIPTION
5 HS_DISABLE High Speed Disable: Disables the capability to attach as either a High/Full-
4 MTT_ENABLE Multi-TT enabl e: Enables one transaction translator per port operation.
3 EOP_DISABLE EOP Disable: Disables EOP generation of EOF1 whe n in Full-Speed mode.
2:1 CURRENT_SNS Over Current Sense: Indicates whether current sensing is on a port-by-port
0 PORT_PWR Port Power Switching: Indicates whether port power switching is on a port-
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!)
0 = single TT for all ports. 1 = one TT per port (multiple TT’s supported)
0 = EOP generation is normal. 1 = EOP generation is disabled.
basis, or ganged. 00 = Ganged sensing (all ports together).
01 = Individual port-by-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 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-
6 Reserved Reserved
5:4 OC_TIMER OverCurrent Timer: Over Current Timer delay.
3 COMPOUND Compound Device: Designate s if Hub is part of a compound device.
2:0 Reserved Reserved
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.
00 = 0.1ms 01 = 2ms 10 = 4ms 11 = 6 m s
0 = No. 1 = Yes, Hub is part of a compound device.
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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= 1; Port 7 non-removable.
Bit 6= 1; Port 6 non-removable. Bit 5= 1; Port 5 non removable. Bit 4= 1; Port 4 non-removable. 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 0Ah: Port Disable For Self Powered Operation (Reset = 0x00)
BIT
NUMBER BIT NAME DESCRIPTION
Datasheet
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= 1; Port 7 is disabled.
Bit 6= 1; Port 6 is disabled. Bit 5= 1; Port 5 is disabled. Bit 4= 1; Port 4 is disabled. Bit 3= 1; Port 3 is disabled. Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = ‘0’
5.3.9.12 Register 0Bh: 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= 1; Port 7 is disabled.
Bit 6= 1; Port 6 is disabled. Bit 5= 1; Port 5 is disabled. Bit 4= 1; Port 4 is disabled. Bit 3= 1; Port 3 is disabled. Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = ‘0’
5.3.9.13 Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00)
BIT
NUMBER BIT NAME DESCRIPTION
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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 combi ned 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 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.
5.3.9.14 Register 0Dh: 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 combi ned 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 0mA in its descriptors.
A value of 50 (decimal) indicates 100mA.
5.3.9.15 Register 0Eh: 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 self­powered 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 100mA
A value of 50 (decimal) indicates 100mA, which is the default value.
5.3.9.16 Register 0Fh: 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 bus­powered 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 permanentl y attached peripheral if the hub is configured as a compound device.
A value of 50 (decimal) would indicate 100mA, which is the default value.
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5.3.9.17 Register 10h: Power-On Time (Reset = 0x00)
BIT
NUMBER BIT NAME DESCRIPTION
Datasheet
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, only 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 7-Port Hub for specific details on how to enable default configuratio n.
Please refer to Table 5.1 on page 19 for the internal default values that are loaded when this option is selected.

5.5 Default Strapping Options:

The SMSC Hub can be configured via a combination of internal defaul t values and pin strap options. Please see Table 4.1, "7-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 d efault values will be used for the bits & registers that are not controlled by a strapping option pin. Please refer to Table 5.1 on page 19 for the internal default values that are loaded when this option is selected.
The Amber and Green LED pins are sampled after RESET_N negation, and the logic values are used to configure the hub if the internal default co nfiguration mode is selected. The implementation shown below (see Figure 5.1) shows a recommended passive scheme. When a pi n is configure d 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” configuration, the LED functions with active high signalling, and the PAD will “source” the current to the external LED.
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+V
Strap High
50K
GR1
HUB
GR2

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 500μA of current from the upstream USB power source (300μA for the Hub and 200μA 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.
2. The PHYs are disabled, and the differential pairs will be in a high-impedance state.
3. All transactions immediately terminate; no states are saved.
4. All internal registers return to the default state (in most cases, 00(h)).
Strap Low
50K
5. The external crystal oscillator is halted.
6. The PLL is halted.
7. LED indicators are disabled. The Hub is “operational” 500μs after RESET_N is negated. Once operational, the Hub immediately reads OEM-specific data from the external EEPROM (if the
SMBus option is not disabled).
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5.6.1.1 RESET_N for Strapping Option Configuration
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
Hardware
reset
asserted
Read Strap
Options
t1
Drive Strap
Outputs to
inactive
levels
Attach
USB
Upstream
t5 t6
USB Reset
recovery
Idle
t7 t8
Start
completion
request
response
t2
Valid
t3
t4
Don’t Care
Driven by Hub if strap is an output.
RESET_N
VSS
Strap Pins
Don’t Care
VSS
Figure 5.2 Reset_N Timing for Default/Strap Option Mode
T able 5.5 Reset_N Timing for Default/Strap Option Mode
NAME DESCRIPTION MIN TYP MAX UNITS
t1 RESET_N Asserted. 1 μsec 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 μsec t5 USB Attach (See Note). 100 msec t6 Host acknowledges attach and signals USB
100 msec
Reset. t7 USB Idle. undefined msec t8 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 th e operating levels mandated in Section Ch apter 7, "DC
Parameters", prior to (or coincident with) the assertion of RESET_N.
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5.6.1.2 RESET_N for EEPROM Configuration
Hardware
reset
asserted
Read Strap
Options
Read EEPROM
+
Set Options
Attach
USB
Upstream
USB Reset
recovery
Idle
Start
completion
request
response
t4
RESET_N
VSS
t1
t2
t3
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 μsec t2 Hub Recovery/Stabilization. 500 μsec t3 EEPROM Read / Hub Config. 2.0 99.5 msec t4 USB Attach (See Note). 100 msec
t5 t6 t7
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 th e operating levels mandated in Section Ch apter 7, "DC
Parameters", prior to (or coincident with) the assertion of RESET_N.
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5.6.1.3 RESET_N for SMBus Slave Configuration
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
Start
completion
request
response
RESET_N
VSS
Hardware
reset
asserted
Reset
Negation
t1
SMBus Code
Load
t2 t4
Hub PHY
Stabilization
t3
Attach
USB
Upstream
USB Reset
recovery
t5
Idle
t6 t7
Figure 5.4 Reset_N Timing for SMBus Mode
T able 5.7 Reset_N T iming for SMBus Mode
NAME DESCRIPTION MIN TYP MAX UNITS
t1 RESET_N Asserted. 1 μsec t2 Hub Recovery/Stabilization. 500 μsec 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:
For Bus-Powered configurations, the 99.5ms (MAX) is requi red, and the Hub and its associated
circuitry must not consume more than 100mA from the upstream USB power source d uring 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 th e operating levels mandated in Section Ch apter 7, "DC
Parameters", prior to (or coincident with) the assertion of RESET_N.

5.6.2 USB Bus Reset

In response to the upstream port signaling a reset to the Hub, the Hub does the following: Note: The Hu b does not propagate the upstream USB reset to downstream devices.
1. Sets default address to 0.
2. Sets configuration to: Unconfigured.
3. Negates PRTPWR[7:1] to all downstream ports.
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4. Clears all TT buffers.
5. Moves device from suspended to active (if suspended).
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.
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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 sh ould toggle.
Integrated USB 2.0 Compatible 7-Port Hub
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Chapter 7 DC Parameters

7.1 Maximum Guaranteed Ratings

PARAMETER SYMBOL MIN MAX UNITS COMMENTS
Storage
Temperature
Lead
Temperature
1.8V supply voltage
3.3V supply voltage
Voltage on any
I/O pin
Voltage on
XTAL1
Voltage on
XTAL2
Note: Stresses above the specified parameters could cause permanent damage to the device. This
T
A
-55 150 °C
325 °C Soldering < 10 seconds
V
DDA18PLL
V
DD18
V
DDA33
V
DDA33PLL
V
DD33
V
DD33CR
-0.5 2.5 V
-0.5 4.0 V
-0.5 (3.3V supply voltage + 2) ≤ 6V
-0.5 4.0 V
-0.5 V
+ 0.3V V
DD18
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 possibi lity exists, it is suggested that a clamp circuit be used.
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Integrated USB 2.0 Compatible 7-Port Hub

7.2 Recommended Operating Conditions

PARAMETER SYMBOL MIN MAX UNITS COMMENTS
Datasheet
Operating
Temperature
1.8V supply voltage V
3.3V supply voltage V
T
A
DDA18PLL
V
DD18
DDA33
V
DDA33PLL
V
DD33
V
DD33CR
070°C
1.62 1.98 V
3.0 3.6 V
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 V Voltage on XTAL2 -0.3 V
DDA33
DD18
V V
Table 7.1 DC Electrical Characteristics
PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS
I, IS Type Input Buffer Low Input Level
V
ILI
0.8
V
TTL Levels High Input Level Input Leakage Hysteresis (‘IS’ Only)
Input Buffer with Pull-Up (IPU)
Low Input Level High Input Level Low Input Leakage High Input Leakage
Input Buffer with Pull-Down IPD
Low Input Level High Input Level Low Input Leakage High Input Leakage
V
V
IHI
I
IL
HYSI
V
ILI
V
IHI
I
ILL
I
IHL
V
ILI
V
IHI
I
ILL
I
IHL
2.0
-10
250 300
2.0
+26
-10
2.0
+10
-22
+10 350
0.8
+72 +10
0.8
-10
-82
V
uA
mV
V
V uA uA
V
V uA uA
= 0 to V
V
IN
TTL Levels
= 0
V
IN
= V
V
IN
DD33
TTL Levels
= 0
V
IN
= V
V
IN
DD33
DD33
Revision 2.3 (08-27-07) 40 SMSC USB2507
DATASHEET
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet
T able 7.1 DC Electrical Characteristics (continued)
PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS
ICLK Input Buffer Low Input Level High Input Level Input Leakage Hysteresis
O12 and I/O12 Type Buffer Low Output Level High Output Level Output Leakage
OD12 Type Buffer Low Output Level Output Leakage
I/OSD12 Type Buffer
V V
V
HYSC
V V
V
ILCK
IHCK
I
IL
OL
OH
I
OL
OL
I
OL
2.0
-10 50
2.4
-10
0.8
+10 100
0.4
+10
0.4
+10
V V
uA
mV
V V
uA
V
µA
TTL Levels
= 0 to V
V
IN
I
= 12mA @ V
OL
DD33
IOH = -4mA @ V
= 0 to V
V
IN
DD33
(Note 1)
I
= 12mA @ V
OL
= 0 to V
V
IN
DD33
(Note 1)
DD33
DD33
DD33
= 3.3V
= 3.3V
= 3.3V
Low Output Level Output Leakage Hysteresis
IO-U (Note 2)
I-R (Note 3)
Supply Current Unconfig­ured
High-Speed Host Full-Speed Host
Supply Current Configured (High-Speed Host)
2 Ports @ FS/LS 2 Ports @ HS 1 Port HS, 1 Port FS/LS 4 Ports @ HS 7 Ports @ HS
V
OL
I
OL
V
HYSI
I
CCINIT
I
CCINIT
I
HCC2
I
HCH2
I
HCH1C1
I
HCC4
I
HCC7
-10
250 300
100
90
180 240 225 300 360
0.4 +10 350
V
µA
mV
mA mA
mA mA mA mA mA
IOL = 12 mA @ V
= 0 to V
V
IN
DD33
DD33
(Note 1)
Total from all supplies
= 3.3V
SMSC USB2507 41 Revision 2.3 (08-27-07)
DATASHEET
Integrated USB 2.0 Compatible 7-Port Hub
T able 7.1 DC Electrical Characteristics (continued)
PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS
Datasheet
Supply Current
Total from all supplies Configured (Full-Speed Host)
1 Port 2 Ports 3 Ports 4 Ports 7 Ports
Supply Current
I
FCC1
I
FCC2
I
FCC3
I
FCC4
I
FCC7
I
CSBY
175 175 175 175 175
225 uA Total from all supplies.
mA mA mA mA mA
Suspend
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; V
DD33
= 3.3V
LIMITS
PARAMETER SYMBOL MIN TYP MAX UNIT TEST CONDITION
Clock Input Capacitance
Input Capacitance C Output Capacitance C
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.
C
OUT
IN
IN
12 pF All pins except USB pins (and pins under
test tied to AC ground)
8pF
12 pF
Revision 2.3 (08-27-07) 42 SMSC USB2507
DATASHEET
Integrated USB 2.0 Compatible 7-Port Hub
Datasheet

Chapter 8 AC Specifications

8.1 Oscillator/Clock

Crystal: Paralle l Resonant, Fundamental Mode, 24 MHz ±100ppm. External Clock: 50% Duty cycle ± 10%, 24 MHz ± 100ppm, Jitter < 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 I2C 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.
SMSC USB2507 43 Revision 2.3 (08-27-07)
DATASHEET

Chapter 9 Package Outline

Integrated USB 2.0 Compatible 7-Port Hub
Datasheet

Figure 9.1 80 Pin TQFP Package Outline (12x12x1.4 mm body - 2 mm footprint)

Table 9.1 80 Pin TQFP Package Parameters

MIN NOMINAL MAX REMARKS
A 1.40 ~ 1.60 Overall Package Height A1 0.05 ~ 0.15 Standoff A2 1.35 1.40 1.45 Bod y Thickness
D 13.80 14.00 14.20 X Span D1 11.80 12.00 12.20 X body Size
E 13.80 14.00 14.20 Y Span E1 11.80 12.00 12.20 Y body Size
H 0.09 ~ 0.20 Lead Frame Thickness
L 0.45 0.60 0.75 Lead Foot Length L1 ~ 1.00 REF. ~ Lead Length
e 0.50 Basic Lead Pitch
q0
W 0.17 0.18 0.27 Lead Width
ccc ~ ~ 0.08 Coplanarity
o
Notes:
1. Controlling Unit: millimeter.
2. Tolerance on the true position of the leads is ± 0.04 mm maximum.
3. Package body dimensions D1 and E1 do not include the mold protrusion. Maximum mold protrusion is 0.25 mm per side. D1 and E1 dimensions determined at datum pla ne H.
4. Dimension for foot length L measured at the gauge plane 0.25 mm above the seating plane.
~7
o
Lead Foot Angle
5. Details of pin 1 identifier are optional but must be located within the zone indicated.
Revision 2.3 (08-27-07) 44 SMSC USB2507
DATASHEET
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