W99681CF Datasheet, PDF (31/78 Pages) Winbond – JPEG USB Dual Mode Camera Chip

W99681CF
16 iSerialNumber
1
0x00 Index of string descriptor describing the
device′s serial number
17 bNumConfigurations
1
0x01 Number of possible configurations
Note 1. Vendor ID and Product ID will be replaced with bytes 0-3 of an external serial E²PROM or uC if
present.
7.4.3.2 Configuration Descriptors
The W99681CF returns a Configuration Descriptor and other configuration related descriptors as
described below. When the host requests the Configuration Descriptor, all related interface and
endpoint descriptors are returned.
Table 7.6 W99681CF Configuration Descriptor
Offset Field
Size Value Description
0
bLength
1
bDescriptorType
1
0x09 Size of this descriptor in bytes
1
0x02 Configuration Descriptor Type
2
wTotalLength
4
bNumberInterfaces
5
bConfigurationValue
2
0x0119 Total length of data returned for this
configuration. Includes the combined length of
all descriptors returned for this configuration.
1
0x01 Number of interfaces supported by this
configuration
1
0x01 Value used as an argument to Set
Configuration to select this configuration
6
iConfiguration
1
0x00 No configuration string
7
bmAttributes
1
0x80 Configuration characteristics
8
Maxpower
1
0xFA or Maximum power consumption from the bus
0x32 when the device is fully operational. Expressed
(Note 1) in 2 mA units.
Note 1. Value of this field is 0xFA (500 mA) for high power devices (CR00_10 = 1), or 0x32 (100 mA)
for low power devices (CR00_10 = 0).
Table 7.7 W99681CF Video Interface Descriptor
Offset Field
Size Value
0
bLength
1
0x09
1
bDescriptorType
2
bInterfaceNumber
3
bAlternateSetting
4
bNumEndpoints
5
bInterfaceClass
1
0x04
1
0x00
1
0x00
1
0x01
1
0x00
Description
Size of this descriptor in bytes
Interface Descriptor Type
Number of interface
Default alternate setting zero
Number of endpoints used by this interface
Image interface class code
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Publication Release Date: March 2000
Revision A1