Datasheet

TUSB8040A

www.ti.com

SLLSEA7F –MAY 2012–REVISED SEPTEMBER 2013

3.4.3 Vendor ID MSB Register

Table 3-6. Register Offset 2h

Bit No. 7 6 5 4 3 2 1 0

Reset State 0 0 0 0 0 1 0 0

Table 3-7. Bit Descriptions – Vendor ID MSB Register

Bit Field Name Access Description

Vendor ID MSB. Most significant byte of the unique vendor ID assigned

by the USB-IF; the default value of this register is 04h representing the

7:0 vendorIdMsb RW

MSB of the TI Vendor ID 0451h. The value may be over-written to

indicate a customer Vendor ID.

3.4.4 Product ID LSB Register

Table 3-8. Register Offset 3h

Bit No. 7 6 5 4 3 2 1 0

Reset State 0 X X 0 0 0 0 1

Table 3-9. Bit Descriptions – Vendor ID LSB Register

Bit Field Name Access Description

Product ID LSB. Least significant byte of the product ID assigned by

Texas Instruments; the default value of this register is 41h representing

the LSB of the product ID assigned by Texas Instruments. The value of

this register will be reported as configured for the SuperSpeed USB

7:0 productIdLsb RW

Device descriptor. The USB 2.0 Device descriptor will report the value in

this register with bit [1] toggled. This ensures that the USB drivers load

properly for both hubs. The value may be over-written to indicate a

customer product ID.

3.4.5 Product ID MSB Register

Table 3-10. Register Offset 4h

Bit No. 7 6 5 4 3 2 1 0

Reset State 1 0 0 0 0 0 0 0

Table 3-11. Bit Descriptions – Vendor ID MSB Register

Bit Field Name Access Description

Product ID MSB. Most significant byte of the product ID assigned by

Texas Instruments; the default value of this register is 80h representing

7:0 productIdMsb RW

the MSB of the product ID assigned by Texas Instruments. The value

may be over-written to indicate a customer product ID.

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