TUSB7340 datasheet(40/122 Pages) TI2

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8.1.6 Class Code and Revision ID Register

This read only register categorizes the Base Class, Sub Class, and Programming Interface of the TUSB73X0.

The Base Class is 0Ch, identifying the device as a Serial Bus Controller. The Sub Class is 03h, identifying the

function as a Universal Serial Bus Host Controller, and the Programming Interface is 30h, identifying the function

as a USB 3.0 xHCI Host Controller. Furthermore, the TI chip revision is indicated in the lower byte (02h).

PCI register offset: 08h

Default value: 0C03 3002h

Table 8-8. PCI Register 06h

Bit

No.

Reset

State

Bit

No.

Reset

State

Table 8-9. Class Code and Revision ID Register Description

BIT

FIELD NAME

ACCESS

DESCRIPTION

31:24

BASECLASS

Base Class. This field returns 0Ch when read, which classifies the function

as a Serial Bus Controller.

23:16

SUBCLASS

Sub Class. This field returns 03h when read, which specifically classifies

the function as a Universal Serial Bus Host Controller.

15:8

PGMIF

Programming Interface. This field returns 30h when read, which identifies

the function as a USB 3.0 xHCI Host Controller.

7:0

CHIPREV

Silicon Revision. This field returns the silicon revision of the function. This

field is 02h.

8.1.7 Cache Line Size Register

This 8-bit register is read/write for legacy compatibility purposes and is not applicable to the functionality of the

TUSB73X0.

PCI register offset: 0Ch

Default value: 00h

Table 8-10. PCI Register 0Ch

Bit No.

Reset State

TUSB7320, TUSB7340

SLLSE76Q – MARCH 2011 – REVISED MARCH 2024

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