TUSB8020BPHPR datasheet(16/43 Pages) TI1

16 / 43 page

TUSB8020B

SLLSEF6A – JULY 2014 – REVISED JULY 2014

www.ti.com

8.5.1.4 Product ID LSB Register (offset = 3h) [reset = 25h]

Figure 6. Register Offset 3h

R/W

LEGEND: R/W = Read/Write; R = Read only; –n = value after reset

Table 7. Product ID LSB Register

Bit

Field

Type

Reset

Description

Product ID LSB. Least significant byte of the product ID assigned by TI and reported in

the SuperSpeed device descriptor. The default value of this register is 25h representing

the LSB of the SuperSpeed product ID assigned by TI. The value reported in the USB

2.0 device descriptor is the value of this register bit wise XORed with 00000010b. The

7:0

productIdLsb

R/W

25h

value may be overwritten to indicate a customer product ID.

This field is read/write unless the OTP ROM VID and OTP ROM PID values are non-

zero. If both values are non-zero, the value when reading this register shall reflect the

OTP ROM value.

8.5.1.5 Product ID MSB Register (offset = 4h) [reset = 80h]

Figure 7. Register Offset 4h

R/W

LEGEND: R/W = Read/Write; R = Read only; –n = value after reset

Table 8. Bit Descriptions – Product ID MSB Register

Bit

Field

Type

Reset

Description

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

value of this register is 80h representing the MSB of the product ID assigned by TI. The

value may be overwritten to indicate a customer product ID.

7:0

productIdLsb

R/W

80h

This field is read/write unless the OTP ROM VID and OTP ROM PID values are non-

zero. If both values are non-zero, the value when reading this register will reflect the

OTP ROM value.

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