USB2534 datasheet(29/62 Pages) SMSC

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USB 2.0 Hi-Speed 4-Port Hub Controller

Datasheet

SMSC USB2534

Revision 1.0 (06-17-13)

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 33 for details.

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