USB 2.0 Hi-Speed 3-Port Hub Controller
Datasheet
Chapter 6 Device Configuration
The device supports a large number of features (some mutually exclusive), and must be configured in
order to correctly function when attached to a USB host controller. The hub can be configured either
internally or externally depending on the implemented interface.
SMSC provides a comprehensive software programming tool, Pro-Touch, for configuring the USB2533
functions, registers and OTP memory. All configuration is to be performed via the Pro-Touch
programming tool. For additional information on the Pro-Touch programming tool, contact your local
SMSC sales representative.
6.1
Configuration Method Selection
The CFG_SEL[1:0] configuration straps and the SDA pin are used to determine the hub configuration
method, as shown in
The software reads the SDA pin and the CFG_SEL[1:0] bits and
configures the system appropriately.
Table 6.1 Hub Configuration Selection
SDA
X
CFG_SEL1
0
CFG_SEL0
0
DESCRIPTION
Configuration is based on the configuration strap options and
internal OTP settings. This configuration sets the device Self
powered operation.
Invalid
Configuration based on the configuration strap options and
internal OTP settings. This configuration sets the device for Bus
powered operation.
Firmware performs a configuration load from 2-wire (I
2
C)
EEPROM. The device does not perform an SMBus Master
detection. Configuration is controlled by EEPROM values and
OTP settings. Strap options are disabled.
Firmware must wait for configuration from an SMBus Master.
Configuration is controlled by SMBus Master and OTP settings.
Strap options are disabled.
0
X
0
1
1
0
0
1
1
1
X
1
Note:
Refer to
for detailed information on each device
configuration interface.
6.2
Customer Accessible Functions
The following USB or SMBus accessible functions are available to the customer via the SMSC Pro-
Touch Programming Tool.
Note:
For additional programming details, refer to the SMSC Pro-Touch Programming Tool User
Manual.
Revision 1.0 (06-17-13)
26
SMSC USB2533
DATASHEET
SMSC [ SMSC CORPORATION ]
