USB2251 datasheet(23/43 Pages) MICROCHIP

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DS00002005A-page 23

USB2250/50i/51/51i

Note 7-1

This value is a UNICODE UTF-16LE encoded string value that meets the USB 2.0 specification

(Revision 2.0, 2000). Values in double quotations without this note are ASCII values.

Note 7-2

For a list of the most current 16-bit language ID’s defined by the USB-IF, please visit

http://www.unicode.org or consult The Unicode Standard, Worldwide Character Encoding, (Version

4.0), The Unicode Consortium, Addison-Wesley Publishing Company, Reading, Massachusetts.

7.2.3

EEPROM DATA DESCRIPTOR REGISTER DESCRIPTIONS

7.2.3.1

00h: USB Serial String Descriptor Length

7.2.3.2

01h: USB Serial String Descriptor Type

7.2.3.3

02h-19h: USB Serial Number Option

7.2.3.4

1Ah-1Bh: USB Vendor ID Option

A7h

SD_PWR_HB

Secure Digital Device

Power Hi byte

80h

A8h

LED_BLK_INT

LED Blink Interval

02h

A9h

LED_BLK_DUR

LED Blink After Access

28h

AAh - B0h

DEV0_ID_STR

Device 0 Identifier String

“CF”

B1h - B7h

DEV1_ID_STR

Device 1 Identifier String

“MS”

B8h - BEh

DEV2_ID_STR

Device 2 Identifier String

“SM”

BFh - C5h

DEV3_ID_STR

Device 3 Identifier String

“SD/MMC”

C6h - CDh

INQ_VEN_STR

Inquiry Vendor String

“Generic”

CEh-D2h

INQ_PRD_STR

Inquiry Product String

2250

D3h

DYN_NUM_LUN

Dynamic Number of LUNs

FFh

D4h - D7h

DEV_LUN_MAP

Device to LUN Mapping

FFh, FFh, FFh, FFh

D8h - DAh

MS_BUS_TIMINGReserved

00h, 03h, 07h

DBh - DDh

MS_BUS_TIMINGReserved

5Ch, 56h, 97h

DEh-FBh

Not Applicable

00h

FCh-FFh

NVSTORE_SIG

Non-Volatile Storage Signature

“ATA2”

Byte

Name

Description

USB_SER_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_SER_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

25:2

USB_SER_NUM

Maximum string length is 12 hex digits. Must be unique to each device.

Byte

Name

Description

1:0

USB_VID

This ID is unique for every vendor. The vendor ID is assigned by the USB

Implementer’s Forum.

TABLE 7-1:

INTERNAL FLASH MEDIA CONTROLLER CONFIGURATIONS (CONTINUED)

Address

Description

Internal Default Value

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