SMSC USB20H04 Technical data
USB20H04
4-Port USB2.0 Hub
Controller
Datasheet
Product Features
General Features
Compliant with USB2.0 Specification
Hub controller IC with four downstream ports
Four transaction translators ensure maximum USB
throughput
Enables bus-powered Hi-Speed hub design
Compatible with On-The-Go (OTG) USB devices
Integrated Session Request Protocol (SRP)
operates with dual-role OTG hosts
Default configuration with pin selectable options
Serial interface for configuration from EEPROM or
microcontroller when default is not used
Flexible OEM configuration options
Available in a 64-pin TQFP package
Hardware Features
Detects removal of self-power and automatically
changes mode to bus-power
Integrated termination and pull-up/pull-down
resistors
Internal short circuit protection of DP and DM lines
On-chip oscillator uses low cost 24MHz crystal
Supports individual or ganged over-current
protection and power control
LED drivers for each downstream port
OEM Selectable Features
Configure as a bus-powered or self-powered
Hi-Speed USB hub
Configure port power switching and current
sensing on an individual or ganged basis
Enable LED indicator support
Enable multiple transaction translators
Enable compound device support on a port by port
basis
Enable downstream facing ports on a port by port
basis
Pin Selectable Options for Default Configuration
Select operation as either a Bus-Powered hub or a
Self-Powered hub
ORDERING INFORMATION
Order Number(s):
USB20H04-JD for 64 pin, 10x10x1.4 TQFP package
USB20H04-JT for 64 pin, 10x10x1.4 TQFP package (green, lead-free)
SMSC USB20H04 Page 1 Revision 1.63 (10-14-04)
DATASHEET
4-Port USB2.0 Hub Controller
Datasheet
Hauppauge, NY 11788
(631) 435-6000
FAX (631) 273-3123
80 Arkay Drive
Copyright © SMSC 2004. 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
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Revision 1.63 (10-14-04) Page 2 SMSC USB20H04
DATASHEET
4-Port USB2.0 Controller
Datasheet
USB20H04 Datasheet Revisions
PAGE(S) SECTION/FIGURE/ENTRY CORRECTION
Cover Ordering Information Added lead-free part number Revision 1.63
26 Table 8.4 Removed 0000 from the over-current timer
value, which places it into the reserved
category
15, 16,
18
15 Table 5.2 – Recommended
13 Table 4.3 - USB I/O Signals VBUSDET pin description updated Revision 1.5
Cover Title Title changed from “Hi-Speed USB Hub
24 Figure 8.2 - Internal Default Mode Updated diagram. Revision 1.3
20 7.5.2 - I2C Memory Interface Removed last sentence. Revision 1.3
24 Figure 8.2 - Internal Default Mode Updated figure. Revision 1.3
27 Table 8.6 - Default Configuration
36 Figure 10.1 - High Level Block
Cover - Ordering Information Changed from “USB20H04L-JD” to
8 Chapter 1 General Description Added paragraph 3. Revision 1.3
9 1.3 Pin Selectable Options to the
10 Figure 2.1 - Block Diagram Added default configuration to diagram. Revision 1.3
19 7.4 Internal Configuration Select Section is updated. Revision 1.3
24 8.1.2 Internal Default Configuration Section is updated. Revision 1.3
27 Table 8.6 - Default Configuration
23 Chapter 8 Implementation Notes Modified first paragraph. Revision 1.2
28 Table 8.7 - Time Values to
Table 5.2, 6.1, 6.2, 6.4 Lower limit for the 1.8V regulator
specification changed from 1.6 to 1.74V.
(Note upper limit restored to previous value
of 2.0V)
1.8V regulator specification changed to
Operating Conditions
Values
Diagram of a Self-Powered Hub
Default Configuration
Values
Configure from SMBus
±5%. (was ±10%)
Controller IC” to “4-Port USB2.0 Hub
Controller”
Updated table with note about PID
changing with silicon revision.
Removed (128x8) from figure. Revision 1.3
“USB20H04-JD”.
Added new section. Revision 1.3
Table added. Revision 1.3
Values added to MAX column:
T2 – 32 ns
T4 – 70 ns
REVISION LEVEL
AND DATE
(10-14-04)
Revision 1.62
(09-10-04)
Revision 1.61
(07-28-04)
Revision 1.6
(07-14-04)
(04-01-04)
Revision 1.4
(12-10-03)
11-13-03
11-11-03
11-11-03
Revision 1.3
11-11-03
11-11-03
Revision 1.3
11-05-03
10-31-03
10-31-03
10-31-03
10-31-03
10-31-03
10-31-03
08-04-03
Revision 1.2
08-04-03
SMSC USB20H04 Page 3 Revision 1.63 (10-14-04)
DATASHEET
4-Port USB2.0 Hub Controller
Datasheet
PAGE(S) SECTION/FIGURE/ENTRY CORRECTION
29 Table 8.8 - Time Values to
Configure From EEPROM
28
Value added to MAX column:
T4 – 70 ns
Updated figure Revision 1.2
Figure 8.3 - Timing for
REVISION LEVEL
AND DATE
Revision 1.2
08-04-03
08-04-03
Configuration from SMBus
29
Updated figure Revision 1.2
08-04-03
Figure 8.4 - Timing to Complete
Configuration from EEPROM
16, 16,
18
Chapter 6 Electrical Characteristics Updated the following tables:
Table 6.1 - Electrical Characteristics:
Revision 1.2
07-31-03
Supply Pins, Table 6.2 - DC Electrical
Characteristics: Digital Pins, Table 6.4 - DC
Electrical Characteristics: Analog I/O Pins
(DP/DM)
Removed Table 6.5 – Dynamic
Characteristics: Analog I/O Pins (DP/DM)
27 8.4.1 External Hardware Reset Updated section Revision 1.2
07-31-03
28 Table 8.7 - Time Values to
Configure from SMBus
29 8.4.1.2 EEPROM Configuration
Timing
Updated table Revision 1.2
07-31-03
Updated:
Revision 1.2
07-31-03
Table 8.8 - Time Values to Configure From
EEPROM
Features Changed reference to QFP package to
TQFP package.
Revision 1.1
07/28/03
11 Figure 3.1– 64 Pin TQFP Updated figure title Revision 0.94
1/31/03
13 Table 4.3 - USB I/O Signals See tracked changes Revision 0.94
1/31/03
15 Table 5.1 - Absolute Maximum
Ratings (In accordance with the
Replaced table Revision 0.94
1/31/03
Absolute Maximum Rating system
(IEC 60134)
18 Table 6.4 - DC Electrical
Characteristics: Analog I/O Pins
Removed reference to Figure 6.1 Revision 0.94
1/31/03
(DP/DM)
18 Dynamic Characteristics: Analog
I/O Pins (DP/DM)
Removed references to Figure 6.2 Revision 0.94
1/31/03
19 7.1 Bus-Power Detect See tracked changes Revision 0.94
1/31/03
20 7.5.1 SMBus Slave See tracked changes Revision 0.94
1/31/03
23 8.1 Configuration Implementations See tracked changes Revision 0.94
1/31/03
23 8.1.1 Interfacing a 2-wire Serial
EEPROM
24 Table 8.1 - Summary of OEM
Value Programming
See tracked changes Revision 0.94
1/31/03
See tracked changes Revision 0.94
1/31/03
Revision 1.63 (10-14-04) Page 4 SMSC USB20H04
DATASHEET
4-Port USB2.0 Controller
Datasheet
PAGE(S) SECTION/FIGURE/ENTRY CORRECTION
25 Table 8.3 - Address 7;
See tracked changes Revision 0.94
Config_Byte_2
- Figure 8.3 – RESET_N Timing for
This figure has been removed Revision 0.94
EEPROM Mode
- Table 8.6 – RESET_N Timing for
This table has been removed Revision 0.94
EEPROM Mode
28
Added figure Revision 0.94
Figure 8.3 - Timing for
Configuration from SMBus
28 Table 8.7 - Time Values to
Added table Revision 0.94
Configure from SMBus
36 Figure 10.1 - High Level Block
Updated figure Revision 0.94
Diagram of a Self-Powered Hub
REVISION LEVEL
AND DATE
1/31/03
1/31/03
1/31/03
1/31/03
1/31/03
1/31/03
SMSC USB20H04 Page 5 Revision 1.63 (10-14-04)
DATASHEET
4-Port USB2.0 Hub Controller
Datasheet
Table of Contents
USB20H04 Datasheet Revisions................................................................................................................. 3
Chapter 1 General Description .............................................................................................................8
1.1 Applications .........................................................................................................................................8
1.2 OEM Selectable Features ...................................................................................................................9
1.3 Pin Selectable Options to the Default Configuration........................................................................... 9
Chapter 2 Functional Block Diagram ................................................................................................10
Chapter 3 Pinout ..................................................................................................................................11
Chapter 4 Interface Signal Definition ................................................................................................12
4.1 Pin Descriptions ................................................................................................................................12
4.2 Buffer Type Descriptions................................................................................................................... 14
Chapter 5 Limiting Values .................................................................................................................. 15
Chapter 6 Electrical Characteristics ..................................................................................................16
6.1 Dynamic Characteristics: Analog I/O Pins (DP/DM) ......................................................................... 18
Chapter 7 Functional Overview.......................................................................................................... 19
7.1 Bus-Power Detect .............................................................................................................................19
7.2 Upstream PHY ..................................................................................................................................19
7.3 Clock/PLL ..........................................................................................................................................19
7.4 Internal Configuration Select............................................................................................................. 19
7.5 Serial Interface .................................................................................................................................. 20
7.5.1 SMBus Slave ..........................................................................................................................................20
7.5.2 I2C Memory Interface..............................................................................................................................20
7.6 Repeater............................................................................................................................................ 20
7.7 SIE.....................................................................................................................................................20
7.8 Controller........................................................................................................................................... 20
7.9 Transaction Translator (TT) ..............................................................................................................21
7.10 Port Controller................................................................................................................................ 21
7.11 Downstream PHY...........................................................................................................................21
7.12 OC Sense/Switch Driver ................................................................................................................ 21
7.12.1 Over-Current Sense ............................................................................................................................21
7.12.2 Switch Driver .......................................................................................................................................21
7.13 LED Drivers.................................................................................................................................... 21
Chapter 8 Implementation Notes........................................................................................................ 23
8.1 Configuration Implementations .........................................................................................................23
8.1.1 Interfacing a 2-wire Serial EEPROM.......................................................................................................23
8.1.2 Internal Default Configuration .................................................................................................................24
8.2 EEPROM Programming Values ........................................................................................................24
8.3 Default Configuration Values ............................................................................................................26
8.4 Reset ................................................................................................................................................. 27
8.4.1 External Hardware Reset........................................................................................................................27
8.4.2 USB Reset ..............................................................................................................................................30
Chapter 9 Hub Descriptors .................................................................................................................31
Chapter 10 Application Diagrams..................................................................................................... 36
Chapter 11 Package Outline ..............................................................................................................38
Revision 1.63 (10-14-04) Page 6 SMSC USB20H04
DATASHEET
4-Port USB2.0 Controller
Datasheet
List of Figures
Figure 2.1 - Block Diagram...........................................................................................................................................10
Figure 3.1– 64 Pin TQFP .............................................................................................................................................11
Figure 8.1 - 2-Wire EEPROM Interface........................................................................................................................23
Figure 8.2 - Internal Default Mode................................................................................................................................24
Figure 8.3 - Timing for Configuration from SMBus .......................................................................................................28
Figure 8.4 - Timing to Complete Configuration from EEPROM ....................................................................................29
Figure 10.1 - High Level Block Diagram of a Self-Powered Hub..................................................................................36
Figure 10.2 - USB Downstream Port Connection.........................................................................................................37
Figure 11.1 - 64 Pin TQFP Package Outline, 10 x 10 x 1.4 Body, 2 MM Footprint ......................................................38
List of Tables
Table 4.1 - System Interface Signals ...........................................................................................................................12
Table 4.2 – Configuration Select and Serial Port Interface...........................................................................................12
Table 4.3 - USB I/O Signals .........................................................................................................................................13
Table 4.4 - Biasing and Clock Oscillator Signals..........................................................................................................14
Table 4.5 - Power and Ground Signals ........................................................................................................................14
Table 4.6 – USB20H04 Buffer Type Descriptions ........................................................................................................14
Table 5.1 - Absolute Maximum Ratings (In accordance with the Absolute Maximum Rating system (IEC 60134).......15
Table 5.2 - Recommended Operating Conditions ........................................................................................................15
Table 5.3 - Recommended Crystal/External Clock Conditions.....................................................................................15
Table 6.1 - Electrical Characteristics: Supply Pins .......................................................................................................16
Table 6.2 - DC Electrical Characteristics: Digital Pins ..................................................................................................16
Table 6.3 - Pin Capacitance .........................................................................................................................................17
Table 6.4 - DC Electrical Characteristics: Analog I/O Pins (DP/DM) ............................................................................18
Table 7.1 - Automatic Mode Port Indicators .................................................................................................................22
Table 7.2 - Manual Mode Port Indicators .....................................................................................................................22
Table 8.1 - Summary of OEM Value Programming ......................................................................................................24
Table 8.2 - Address 6; Config_Byte_3..........................................................................................................................25
Table 8.3 - Address 7; Config_Byte_2..........................................................................................................................25
Table 8.4 - Address 8; Config_Byte_1..........................................................................................................................26
Table 8.5 - Addresses 9 - 11 ........................................................................................................................................26
Table 8.6 - Default Configuration Values......................................................................................................................27
Table 8.7 - Time Values to Configure from SMBus ......................................................................................................28
Table 8.8 - Time Values to Configure From EEPROM.................................................................................................29
Table 9.1 - Device Descriptor.......................................................................................................................................31
Table 9.2 - Device Qualifier Descriptor ........................................................................................................................31
Table 9.3 - Standard Configuration Descriptor .............................................................................................................32
Table 9.4 - Other_Speed_Configuration Descriptor .....................................................................................................32
Table 9.5 - Standard Interface Descriptor ....................................................................................................................33
Table 9.6 - Standard Endpoint Descriptor ....................................................................................................................33
Table 9.7 - Interface Descriptor (present if multiple-TT)...............................................................................................34
Table 9.8 - On-The-GO (OTG) Descriptor....................................................................................................................34
Table 9.9 - Class-Specific Hub Descriptor (Full-Speed and High-Speed) ....................................................................34
Table 11.1 - 64 Pin TQFP Package Parameters ..........................................................................................................38
SMSC USB20H04 Page 7 Revision 1.63 (10-14-04)
DATASHEET
Chapter 1 General Description
The USB20H04 four-port hub controller is fully compliant with the USB2.0 Specification and does not
require firmware development. When connected to a high-speed host, the four downstream facing ports
can operate at low-speed (1.5Mb/s), full-speed (12Mb/s), or high-speed (480Mb/s). As required by the
USB2.0 Specification, the USB20H04 is fully backward compatible with legacy full-speed hosts. 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 USB20H04 supports both bus-powered and self-powered configurations. For self-powered operation,
an external supply is used to power the downstream facing ports. In bus-powered mode, all power is
derived from the upstream facing port and no external power supply is required. An external USB power
distribution switch device is used to control V
sense over-current conditions.
A default configuration is available in the USB20H04 following a reset. This configuration may be sufficient
for some applications when it is desired to save the expense of an EEPROM. The controller may also be
configured from a microcontroller or an external EEPROM. When using the microcontroller interface, the
USB20H04 appears as an SMBus slave device. The EEPROM interface supports a 2-wire I
switching to downstream ports, and to limit current and
BUS
4-Port USB2.0 Hub Controller
Datasheet
2
C device.
All required resistors on the USB ports are integrated into the USB20H04. 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 four downstream facing ports will be called the downstream ports.
1.1 Applications
The Universal Serial Bus (USB) hub may be used in a number of applications:
Standalone hubs
Keyboards
Monitors
Motherboard hubs
Docking stations and port replicators
Printers and scanners
External storage devices
Auxiliary battery docks
Revision 1.63 (10-14-04) Page 8 SMSC USB20H04
DATASHEET
4-Port USB2.0 Controller
Datasheet
1.2 OEM Selectable Features
The 4-Port Hub supports several OEM selectable features:
Operation as a bus-powered, self-powered or dynamic-powered hub. (When configured for dynamic
operation, the controller automatically switches to bus-powered mode if a local power source is
unavailable).
Configure downstream facing port power switching on an individual or ganged basis.
Configure downstream facing port over-current sensing on an individual or ganged basis.
Enable downstream facing port LED indicators.
Select multiple or single transaction translator mode.
Select whether the hub is part of a compound device (when any downstream facing port is
permanently hardwired to a USB peripheral device, the hub is part of a compound device).
Select the presence of a permanently hardwired USB peripheral device on a port by port basis.
Enable downstream facing ports a port by port basis.
Enable EOP generation of EOF1 when operating in full-speed mode, as described in Section 11.3.1 of
the USB2.0 Specification.
Enable USB On-The-Go Session Request Protocol (SRP) support.
Configure the delay time for filtering the over-current sense inputs.
Configure the delay time until port power is good after the SetPortPower command is received.
Indicate the maximum current that the 4-port hub consumes from an upstream port.
Indicate the maximum current required for the hub controller.
1.3 Pin Selectable Options to the Default Configuration
The USB20H04 includes a default configuration for those applications where an external EEPROM or
SMBus device is not available to provide the configuration. This configuration may be adequate in some
applications. A pin selectable feature supports configuration as either a bus-powered hub or a
self-powered hub determined by the logic level of the SELF_PWR pin following reset.
SMSC USB20H04 Page 9 Revision 1.63 (10-14-04)
DATASHEET
Chapter 2 Functional Block Diagram
To Upstream
V
BUS
Upstream
USB Data
24 MHz
Crystal
Pin
Selectable
Options
4-Port USB2.0 Hub Controller
Datasheet
To EEPROM or
SMBus Master
SCKSD
Bus-Power
Detect/
Pulse
V
BUS
Downstream
PHY #1
Upstream
PHY
Repeater
Routing Logic
Port #1
OC Sense
Switch Driver
LED Drivers
Internal
PLL
Configuration
TT#1TT#2TT#3TT
#4
Downstream
PHY #4
Select
ControllerSIE
Controller
Port #4
OC Sense
Switch Driver
LED Drivers
Serial
Interface
Port
Downstream
USB DataOCSense
Revision 1.63 (10-14-04) Page 10 SMSC USB20H04
Switch/LED
Downstream
Drivers
Figure 2.1 - Block Diagram
USB DataOCSense
Switch/LED
Drivers
DATASHEET
4-Port USB2.0 Controller
Datasheet
Chapter 3 Pinout
VSS
RBIAS
ATEST
VDDA33
VDDA18
VSS
XTAL1/CLKIN
XTAL2
VDDA18
VSS
VDD18
VSS
VBUSDET
SELF_PWR
SMB_SEL_N
RESET_N
VDDA33
USBDP0
USBDM0
VSS
USBDM1
USBDP1
VDDA33
USBDP2
USBDM2
VSS
USBDM3
USBDP3
VDDA33
USBDP4
USBDM4
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
646362
17
18
NC
NC
61
6059585756555453525150
USB20H04
2122232425262728293031
20
19
VSS
AM4_N
GR4_N
AM3_N
GR3_N
AM2_N
GR2_N
AM1_N
GR1_N
VDD33
VSS
VDD18
49
48
TEST_P3
CLKIN_EN
47
46
OCS1_N
45
VBUS1_N
44
OCS2_N
43
VBUS2_N
42
VDD18
VSS
41
40
39
38
37
36
35
34
33
32
TEST_P0
TEST_P1
OCS3_N
VBUS3_N
OCS4_N
VBUS4_N
CS/EESEL
SCK/SCL
SD/SDA
TEST_P2
Figure 3.1– 64 Pin TQFP
SMSC USB20H04 Page 11 Revision 1.63 (10-14-04)
DATASHEET
Chapter 4 Interface Signal Definition
4.1 Pin Descriptions
Table 4.1 - System Interface Signals
4-Port USB2.0 Hub Controller
Datasheet
NAME
RESET_N IS Low
SELF_PWR I High
TEST_P0 IPD N/A
TEST_P1 IPD N/A
TEST_P2 IPD N/A
TEST_P3 IPD N/A
ATEST AO N/A
NAME
SMB_SEL_N I N/A
CS/EE_SEL IO8 N/A
SD/SDA IOSD12 N/A
SCK/SCL IOSD12 N/A
BUFFER
TYPE
BUFFER
TYPE
ACTIVE
LEVEL
Chip Reset. The minimum active low pulse is 100ns. See section 8.4 for a
complete description of operation following a reset.
Self-power Detect. Detects availability of local self-power source:
0: Self/local power source is NOT available (i.e., 4- Port Hub gets all power
from Upstream USB V
1: Self/local power source is available.
Test Pin. Do Not Connect
Test Pin. Do Not Connect
Test Pin. Do Not Connect
Test Pin. Do Not Connect
Test Pin. Do Not Connect
Table 4.2 – Configuration Select and Serial Port Interface
ACTIVE
LEVEL
SMBus Select. Selects between configuration via the SMBus interface, or
from an external EEPROM or using the internal default, as described in
the table below.
SMB_SEL_N CS/EE_SEL SMBus or EEPROM interface
Chip Select. This multifunction pin is sampled on the rising edge of
RESET_N. If SMB_SEL_N = 1, the internal default configuration will be
used when this pin is low, or the external I2C EEPROM will supply the
configuration when this pin is high. When SMB_SEL_N = 0, this pin
selects the SMBus slave address, as described in the table above.
Connect a 1k ohm resistor in series with the input when connecting this
pin to either VDD or VSS.
Serial Data. Data I/O on the 2-Wire interface.
Serial Clock. Clock for the 2-Wire interface.
DESCRIPTION
).
BUS
DESCRIPTION
configuration.
0 0 SMBus slave. Address: 0101100
0 1 SMBus slave. Address: 0101101
1 0 Internal default configuration.
1 1 2-wire EEPROM interface.
Revision 1.63 (10-14-04) Page 12 SMSC USB20H04
DATASHEET
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