Configuration Descriptor (All Speeds); Interface Descriptor; Interface Descriptor For Bot Mode (All Speeds) - Renesas mPD720231 User Manual

μ
PD720231

4.3 Configuration Descriptor (All speeds)

A configuration descriptor describes information about a specific device configuration. When the host
requests the configuration descriptor, all related interface and endpoint descriptors are returned.
Offset Field
0 bLength
1 bDescriptorType
2 wTotalLength
4 bNumInterfaces
5 bConfigurationValue
6 iConfiguration
7 bmAttributes
8 bMaxPower

4.4 Interface Descriptor

An interface descriptor describes a specific interface within a configuration. An interface descriptor is
returned as part of the configuration information returned by a GET_DESCRIPTOR Configuration request.
4.4.1

Interface descriptor for BOT mode (All speeds)

Offset Field
0 bLength
1 bDescriptorType
2 bInterfaceNumber
3 bAlternateSetting
4 bNumEndpoints
5 bInterfaceClass
6 bInterfaceSubClass
7 bInterfaceProtocol
8 iInterface
R19UH0094EJ0100 Rev 1.00
Mar 1, 2013
Size Value
1 09h Size of descriptor
1 02h Configuration descriptor type
2 0079h Total length
1 01h Number of interfaces supported by this configuration
1 01h Number of this configuration
1 00h Index of string descriptor describing configuration.
1 C0h Configuration characteristics.
C0h: Self-powered
1 12h (in Maximum power consumption of the USB device from
Super- the bus in this configuration when the device is fully
speed) operational.
device is operating in High/Full-speed mode and in 8-
32h (in
mA units when operating in Super-speed mode.
High-/Full-
speed)
Size Value
1 09h Size of descriptor
1 04h Interface descriptor type
1 00h Number of interface
1 00h Value used to select alternate setting for the interface
identified in the prior field
1 02h Number of endpoints used by this interface
1 08h Class code: Mass Storage Class.
1 06h or 02h SubClass Code: SCSI Transport or ATAPI
1 50h Protocol Code: Bulk-Only Protocol
1 00h Index of string descriptor describing interface
4. USB Descriptor Information
Description
Expressed in 2-mA units when the
Description
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