USB2640 datasheet(27/60 Pages) MICROCHIP

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DS00001947C-page 27

USB2640/USB2641

7.3.3.6

1Eh: USB Language String Descriptor Length

7.3.3.7

1Fh: USB Language String Descriptor Type

7.3.3.8

20h: USB Language Identifier Least Significant Byte

7.3.3.9

21h: USB Language Identifier Most Significant Byte

7.3.3.10

22h: USB Manufacturer String Descriptor Length

7.3.3.11

23h: USB Manufacturer String Descriptor Type

7.3.3.12

24h-31h: USB Manufacturer String

7.3.3.13

32h-5Dh: Reserved

Byte

Name

Description

USB_LANG_LEN

USB serial string descriptor length as defined by Section 9.6.7 “String” of the

USB 2.0 Specification (Revision 2.0, 2000). This field is the “bLength” which

describes the size of the string descriptor (in bytes).

Byte

Name

Description

USB_LANG_TYP

USB serial string descriptor type as defined by Section 9.6.7 “String” of the

USB 2.0 Specification (Revision 2.0, 2000). This field is the “bDescriptorType”

which is a constant value associated with a string descriptor type.

Byte

Name

Description

USB_LANG_ID

_LSB

English Language Code = ‘0409’. See Note 7-3 to reference additional

language ID’s defined by the USB-IF.

Byte

Name

Description

USB_LANG_ID

_MSB

English Language Code = ‘0409’. See Note 7-3 to reference additional

language ID’s defined by the USB-IF.

Byte

Name

Description

USB_MFR_STR

_LEN

USB serial string descriptor length as defined by Section 9.6.7 “String” of the

USB 2.0 Specification (Revision 2.0, 2000). This field is the “bLength” which

describes the size of the string descriptor (in bytes).

Byte

Name

Description

USB_MFR_STR

_TYP

USB serial string descriptor type as defined by Section 9.6.7 “String” of the

USB 2.0 Specification (Revision 2.0, 2000). This field is the “bDescriptorType”

which is a constant value associated with a string descriptor type.

Byte

Name

Description

15:2

USB_MFR_STR

Maximum string length is 28 characters. (See Note 7-4)

Byte

Name

Description

59:16

Reserved

Reserved.

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