USB 2.0 Hi-Speed 3-Port Hub Controller
Datasheet
6.2.1.5
Other Embedded Controller functions over USB
The following miscellaneous functions may be configured via USB:
Enable/Disable Embedded controller enumeration
Program Configuration parameters.
Program descriptor fields:
—Language ID
—Manufacturer string
—Product string
—idVendor
—idProduct
—bcdDevice
6.2.2
SMBus Accessible Functions
6.2.2.1
OTP Access over SMBus
The device’s OTP ROM is accessible over SMBus. All OTP parameters can modified via the SMbus
Host. The OTP can be programmed to operate in Single-Ended, Differential, Redundant, or Differential
Redundant mode, depending on the level of reliability required. The supported commands are:
Enable OTP reset
Set OTP operating mode
Set OTP read mode
Program OTP
Get OTP Status
Program OTP control parameters
6.2.2.2
Configuration Access over SMBus
The following functions are available over SMBus prior to the hub attaching to the USB host:
Program Configuration parameters.
Program descriptor fields:
—Language ID
—Manufacturer string
—Product string
—idVendor
—idProduct
—bcdDevice
Program Control Register
6.2.2.3
Run time Access over SMBus
There is a limited number of registers that are accessible via the SMBus during run time operation of
the device. Refer to Section 7.2.1, "SMBus Run Time Accessible Registers," on page 32 for details.
Revision 1.0 (06-17-13)
28
SMSC USB2533
DATASHEET
SMSC [ SMSC CORPORATION ]
