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USB82642 Datenblatt(PDF) 28 Page - Microchip Technology

Teilenummer USB82642
Bauteilbeschribung  Automotive USB 2.0 Hub and Flash Media Card Controller Combo
PDF  64 Pages
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Hersteller  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB82642 Datenblatt(HTML) 28 Page - Microchip Technology

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USB82642
DS60001253F-page 28
 2012-2021 Microchip Technology Inc.
7.5.3.3
CEh-D2h: Inquiry Product String
7.5.3.4
D3h: Dynamic Number of LUNs
7.5.3.5
D4h-D7h: LUN to Device Mapping
7.5.3.6
D8h-DAh: Reserved
7.5.3.7
DBh-DDh: SD/MMC Bus Timing Control
7.5.3.8
DEh: Vendor ID (LSB)
Byte
Name
Description
4:0
INQ_PRD_STR
If bit 4 of the 1st attribute byte is set, the device will use these strings in
response to a USB inquiry command, instead of the USB descriptor manufac-
turer and product ID strings.
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
rsvd
Byte
Name
Description
2:0
SD_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).



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