USB3503 datasheet(47/73 Pages) MICROCHIP

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DS00001584B-page 47

USB3503

7.5

String Descriptors

The USB3503 supports a 30 Character Manufacturer String Descriptor, a 30 Character Product String and a 30 charac-

ter Serial String.

7.5.1

STRING DESCRIPTOR ZERO (SPECIFIES LANGUAGES SUPPORTED)

7.5.2

STRING DESCRIPTOR 1 (MANUFACTURER STRING)

7.5.3

STRING DESCRIPTOR 2 (PRODUCT STRING)

7.5.4

STRING DESCRIPTOR 3 (SERIAL STRING)

TABLE 7-12:

STRING DESCRIPTOR ZERO

Offset

Field

Size

Value

Description

Length

04h

Size of this Descriptor.

DescriptorType

03h

String Descriptor Type.

LANGID

xxxxh

Language ID code from LANG_ID_H and LANG_ID_L

registers

TABLE 7-13:

STRING DESCRIPTOR 1, MANUFACTURER STRING

Offset

Field

Size

Value

Description

Length

yyh

Size of this Descriptor. The yy value is created by taking

the MFR_STR_LEN{bytes} + 2{bytes}

DescriptorType

03h

String Descriptor Type.

String

string

Manufacturer String

The string is located in the MFR_STR register and the

size (N) is held in the MFR_STR_LEN register

TABLE 7-14:

STRING DESCRIPTOR 2, PRODUCT STRING

Offset

Field

Size

Value

Description

Length

yyh

Size of this Descriptor. The yy value is created by taking

the PRD_STR_LEN{bytes} + 2{bytes}

DescriptorType

03h

String Descriptor Type.

String

string

Product String

The string is located in the PROD_STR register and the

size (N) is held in the PRD_STR_LEN register

TABLE 7-15:

STRING DESCRIPTOR 3, SERIAL STRING

Offset

Field

Size

Value

Description

Length

yyh

Size of this Descriptor. The yy value is created by taking

the SER_STR_LEN{bytes} + 2{bytes}

DescriptorType

03h

String Descriptor Type.

String

string

Serial String

The string is located in the SER_STR register and the

size (N) is held in the SER_STR_LEN register

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