USB4624 datasheet(29/58 Pages) MICROCHIP

29 / 58 page

USB 2.0 HSIC Hi-Speed 4-Port Hub Controller

Datasheet

 2014 Microchip Technology Inc.

DS00001717A-page 29

6.2.1.2

SPI Access over USB

Access to an attached SPI device is performed as a pass-through operation from the USB Host. The

device firmware has no knowledge of the operation of the attached SPI device. The supported

commands are:



Enable SPI pass through mode



Disable SPI pass through mode



SPI write



SPI read

Note: Refer to Section 7.1, "SPI Interface," on page 32 for additional information on the SPI interface.

6.2.1.3

OTP Access over USB

The OTP ROM in the device is accessible via the USB bus. All OTP parameters can modified via the

USB Host. The OTP operates in Single Ended mode. The supported commands are:



Enable OTP reset



Set OTP operating mode



Set OTP read mode



Program OTP



Get OTP status



Program OTP control parameters

6.2.1.4

Battery Charging Access over USB

The Battery charging behavior of the device can be dynamically changed by the USB Host when

something other than the preprogrammed or OTP programmed behavior is desired. The supported

commands are:



Enable/Disable battery charging



Upstream battery charging mode control



Downstream battery charging mode control



Battery charging timing parameters



Download custom battery charging algorithm

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

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