TUSB8042AI datasheet(34/64 Pages) TI2

34 / 64 page

8.16 Serial Number String Length Register

Figure 8-15. Register Offset 22h

Bit No.

Reset State

Table 8-16. Bit Descriptions – Serial Number String Length Register

Bit

Field

Type

Description

7:6

RSVD

Reserved. Read only, returns 0 when read.

5:0

serNumStringLen

RO/RW

Serial number string length. The string length in bytes for the serial

number string. The default value is 18h indicating that a 24 byte serial

number string is supported. The maximum string length is 32 bytes.

When customSernum is 1, this field can be overwritten by the contents

of an attached EEPROM or by an SMBus host.

When the field is non-zero, a serial number string of serNumbStringLen

bytes is returned at string index 1 from the data contained in the Serial

Number String registers.

8.17 Manufacturer String Length Register

Figure 8-16. Register Offset 23h

Bit No.

Reset State

Table 8-17. Bit Descriptions – Manufacturer String Length Register

Bit

Field

Type

Description

RSVD

Reserved. Read only, returns 0 when read.

6:0

mfgStringLen

RO/RW

Manufacturer string length. The string length in bytes for the

manufacturer string. The default value is 0, indicating that a

manufacturer string is not provided. The maximum string length is 64

bytes.

When customStrings is 1, this field can be overwritten by the contents

of an attached EEPROM or by an SMBus host.

When the field is non-zero, a manufacturer string of mfgStringLen

bytes is returned at string index 3 from the data contained in the

Manufacturer String registers.

8.18 Product String Length Register

Figure 8-17. Register Offset 24h

Bit No.

Reset State

Table 8-18. Bit Descriptions – Product String Length Register

Bit

Field

Type

Description

RSVD

Reserved. Read only, returns 0 when read.

6:0

prodStringLen

RO/RW

Product string length. The string length in bytes for the product string.

The default value is 0, indicating that a product string is not provided.

The maximum string length is 64 bytes.

When customStrings is 1, this field can be overwritten by the contents

of an attached EEPROM or by an SMBus host.

When the field is non-zero, a product string of prodStringLen bytes is

returned at string index 3 from the data contained in the Product String

registers.

TUSB8042A

SLLSF93A – JUNE 2019 – REVISED JANUARY 2025

www.ti.com

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