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USB4640 Datenblatt(PDF) 40 Page - SMSC Corporation |
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USB4640 Datenblatt(HTML) 40 Page - SMSC Corporation |
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40 / 64 page ![]() High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller Datasheet Revision 1.0 (06-09-09) 40 SMSC USB4640/USB4640i DATASHEET 8.4.3.7 D3h: Dynamic Number of LUNs 8.4.3.8 D4h-D7h: Device to LUN Mapping 8.4.3.9 D8h-DDh: Reserved 8.4.4 Hub Controller Configurations 8.4.4.1 DEh: Vendor ID (LSB) 8.4.4.2 DFh: Vendor ID (MSB) 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. 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. BYTE NAME DESCRIPTION 2:0 Reserved Reserved. 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). 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). |
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