SMSC USB464, USB4640i 8.4.4Hub Controller Configurations, D3h: Dynamic Number of LUNs, 8.4.3.8D4h-D7h:Device to LUN Mapping, 8.4.3.9D8h-DDh:Reserved, DEh: Vendor ID (LSB)

		High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller
		Datasheet
8.4.3.7	D3h: Dynamic Number of LUNs
BIT	NAME	DESCRIPTION
7:0	DYN_NUM_LUN	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
		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.

8.4.3.8D4h-D7h: Device to LUN Mapping

BYTE	NAME	DESCRIPTION
3:0	DEV_LUN_MAP	These registers map a device controller (SD/MMC, SM (Note 8.2), and MS)
		to a Logical Unit Number (LUN). The device reports the mapped LUNs to
		the USB host in the USB descriptor during enumeration. The icon installer
		associates custom icons with the LUNs specified in these fields.
		Setting a register to "FF" indicates that the device is not mapped. Setting all
		of the DEV_LUN_MAP registers for all devices to "FF" forces the use of the
		default mapping configuration. Not all configurations are valid. Valid
		configurations depend on the hardware, packaging, and OEM board layout.
		The number of unique LUNs mapped must match the value in the Section
		8.4.3.7, "D3h: Dynamic Number of LUNs," on page 40.

8.4.3.9D8h-DDh: Reserved

BYTE	NAME	DESCRIPTION
2:0	Reserved	Reserved.

8.4.4Hub Controller Configurations

8.4.4.1	DEh: Vendor ID (LSB)
BIT	BYTE 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).
8.4.4.2	DFh: Vendor ID (MSB)
BIT	BYTE 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).

Revision 1.0 (06-01-09) 40 SMSC USB4640/USB4640i

DATASHEET