參數(shù)資料
型號(hào)： W9968CF
英文描述： Digital Camera
中文描述： 數(shù)碼相機(jī)
文件頁(yè)數(shù)： 31/78頁(yè)
文件大?。?/td> 814K
代理商： W9968CF
W9968CF
Publication Release Date: May 1999
- 31 - Revision A2
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 E
2
PROM or uC if
present.
7.4.3.2 Configuration Descriptors
The W9968CF 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 W9968CF Configuration Descriptor
Offset
Field
Size
Value
Description
0
bLength
1
0x09
Size of this descriptor in bytes
1
bDescriptorType
1
0x02
Configuration Descriptor Type
2
wTotalLength
2
0x0119
Total length of data returned for this
configuration. Includes the combined length of
all descriptors returned for this configuration.
4
bNumberInterfaces
1
0x01
Number of interfaces supported by this
configuration
5
bConfigurationValue
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
0x32
(Note 1)
Maximum power consumption from the bus
when the device is fully operational. Expressed
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 W9968CF Video Interface Descriptor
Offset
Field
Size
Value
Description
0
bLength
1
0x09
Size of this descriptor in bytes
1
bDescriptorType
1
0x04
nterface Descriptor Type
2
bInterfaceNumber
1
0x00
Number of interface
3
bAlternateSetting
1
0x00
Default alternate setting zero
4
bNumEndpoints
1
0x01
Number of endpoints used by this interface
5
bInterfaceClass
1
0x00
mage interface class code
6
bInterfaceSubClass
1
0x00
Digital Video Camera subclass code
7
bInterfaceProtocol
1
0x00
Protocol code. No class specific protocol.
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