USB82640 datasheet(30/64 Pages) MICROCHIP

30 / 64 page

USB82640

DS60001312A-page 30

 2010-2015 Microchip Technology Inc.

7.3.3.7

D3h: Dynamic Number of LUNs

7.3.3.8

D4h-D7h: LUN to Device Mapping

7.3.3.9

D8h-DAh: MS Bus Timing Control

7.3.3.10

DBh-DDh: SD/MMC Bus Timing Control

7.3.3.11

DEh: Vendor ID (LSB)

7.3.3.12

DFh: Vendor ID (MSB)

Bit

Name

Description

7:0

DYN_NUM_LUN

This byte is used to specify the number of LUNs the device exposes to the

host. These bytes are also used for icon sharing by assigning more than one

LUN to a single icon. This is used in applications where the device utilizes a

combo socket and the OEM wishes to have only a single icon displayed for

one or more interfaces.

If this field is set to FF, the program assumes that you are using the default

value and icons will be configured per the default configuration.

Byte

Name

Description

3:0

LUN_DEV_MAP

These bytes are used to specify the number of LUNs the device exposes to

the host. These bytes are also used for icon sharing by assigning more than

one LUN to a single icon. This is used in applications where the device uti-

lizes a combo socket and the OEM wishes to have only a single icon dis-

played for one or more interfaces.

If this field is set to FF, the program assumes that you are using the default

values and LUNs will be configured per the default configuration.

Byte

Name

Description

2:0

MS_BUS_TIMING

The values for these bytes are set internally and must not be altered.

Byte

Name

Description

2:0

SD_1_MMC_BUS_

TIMING

The values for these bytes are set internally and must not be altered.

Bit

Name

Description

7:0

VID_LSB

Least Significant Byte of the Vendor ID. This is a 16-bit value that uniquely

identifies the vendor of the user device (assigned by USB Implementer’s

Forum).

Bit

Name

Description

7:0

VID_MSB

Most Significant Byte of the Vendor ID. This is a 16-bit value that uniquely

identifies the vendor of the user device (assigned by USB Implementer’s

Forum).

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