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ST5481 数据表(PDF) 11 Page - STMicroelectronics

部件名 ST5481
功能描述  L.O.U.I.S - LOW COST USB ISDN SOLUTION
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST5481 数据表(HTML) 11 Page - STMicroelectronics

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USB Descriptors
During the USB request GET DESCRIPTOR, the device returns these values from an internal 256 byte
ROM.
Notes 1. This word represents the hardware-software association. The value is programmable through 4 of the 16 bits. the lower bits values
are defined by pins ID3 to ID0.
2. This word represents the silicon hardware. The lower 8-bit value is defined at metal layer. The other 8 bits are written into the ROM
at diffusion layer.
Note
1. Theses words are defined by a transcoding of the pins CFG0, CFG1, RPSM : see power management section for coding of these
pins.
Table 2 : Device Descriptor
ROM addr
Offset
Field
Size
Value
Description
08
0
bLengh
1
12h
Size of this descriptor in bytes
09
1
bDescriptorType
1
01h
Device Descriptor type
0A
2
bcdUSB
2
0101h
USB spec release number 1.1
0C
4
bDeviceClass
1
FFh
Vendor Specific Class code
0D
5
bDeviceSubClass
1
01h
Vendor specific ISDN MODEM subclass
0E
6
bDeviceProtocol
1
01h
Vendor specific ISDN SOFT MODEM control protocol
0F
7
bMaxPacketSize0
1
08h
Max packet size for EP0
10
8
idVendor
2
0483h
ST id vendor
12
10
idProduct
2
481xh
Application id product 1
14
12
bcdDevice
2
01xxh
Device release 2
16
14
iManufacturer
1
00h
No specific manufacturer registred
17
15
iProduct
1
01h
product id String descriptor index 1
18
16
iSerialNumber
1
00h
No specific serial number registred
19
17
bNumConfigurations
1
01h
Number of possible configurations
Table 3 : Interface 0 as 0 Descriptor
ROM addr
Offset
Field
Size
Value
Description
20
0
bLengh
1
09h
Size of this descriptor in bytes
21
1
bDescriptorType
1
02h
Configuration Descriptor type
22
2
wTotalLengh
2
00CFh
Total length of data byte returned for this configuration
24
4
bNumInterface
1
01h
number of interfaces supported by this configuration
25
5
bConfigurationValue
1
01h
value used to select this conf.
26
6
iConfiguration
1
00h
No specific string descriptor for this configuration
27
7
bmAttributes
1
XXh
Self powered and remote wake-up abilities
programmable 1
28
8
MaxPower
1
XXh
max consumption programmable 1


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