TUSB8044AI datasheet(43/63 Pages) TI1

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TUSB8044A

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SLLSF92 – FEBRUARY 2019

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8.5.27 Billboard String1 Length

Figure 28. Register Offset 2Ch (Billboard String1 Length)

Bit No.

Reset State

Table 35. Bit Descriptions – Billboard String1 Length.

Bit

Field

Type

Description

7:0

BBString1Len

Billboard String1Len. This field indicates the length in number of

UNICODE characters of the Billboard string1. This is not the length of

the string descriptor. BBString1Len size + BBString2Len size must be

<= 480 bytes, or < 480 if # characters in string 1 is odd, because string

2 must start on an address that is a multiple of 4 (bytes).

The bLength field of the Additional Info URL string descriptor is 2 + (2 *

BBString1Len).

This field defaults to 0x00 and reports the default string value shown in

Billboard String1_2 but can be changed using an external I2C

EEPROM or SMBus.

8.5.28 Billboard String2 Length

Figure 29. Register Offset 2Dh (Billboard String2 Length)

Bit No.

Reset State

Table 36. Bit Descriptions – Billboard String2 Length.

Bit

Field

Type

Description

7:0

BBString2Len

Billboard String2Len. This field indicates the length in number of

UNICODE characters of the Billboard string2. This is not the length of

the string descriptor.

The bLength field of the Alternate Mode string descriptor is 2 + (2 *

BBString2Len).

This field defaults to 0x00 and reports the default string value shown in

Billboard String1_2 but can be changed using an external I2C

EEPROM or SMBus.

8.5.29 Serial Number String Registers

Figure 30. Register Offset 30h-4Fh

Bit No.

Reset State

Table 37. Bit Descriptions – Serial Number Registers

Bit

Field

Type

Description

7:0

serialNumber[n]

RO/RW

Serial Number byte N. The serial number returned in the Serial

Number string descriptor at string index 1. The default value of these

registers is assigned by TI. When customSernum is 1, these registers

may be over-written by EEPROM contents or by an SMBus host.

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