參數(shù)資料
型號： MC141555
廠商： Motorola, Inc.
英文描述： USB Hub Controller CMOS
中文描述： USB集線器控制器的CMOS
文件頁數(shù)： 9/16頁
文件大?。?/td> 280K
代理商： MC141555
MC141555
9
MOTOROLA
Table 4. Interface Descriptor
Table 5. Endpoint Descriptor
Table 6. Hub Descriptor
Offset
Field
Size
Value
Description
0
bLength
1
09h
No. of bytes in this descriptor = 9
1
bDescriptorType
1
04h
Interface descriptor type
2
bInterfaceNumber
1
00h
No. of Interface = 0
3
bAlternateSetting
1
00h
Alternate setting value for the interface identified in the prior field
= 0
4
bNumEndpoints
1
01h
No. of endpoints used by this interface = 1
5
bInterfaceClass
1
09h
Class code = 09 (assigned by USB)
6
bInterfaceSubClass
1
00h
SubClass code = 01 (assigned by USB)
7
bInterfaceProtocol
1
00h
Protocol code = 00 (assigned by USB)
8
iInterface
1
00h
Index of string descriptor describing this interface = 0
Offset
0
Field
bLength
Size
1
Value
07h
Description
No. of bytes in this descriptor = 7
1
bDescriptorType
1
05h
Endpoint descriptor type
2
bEndpointAddress
1
81h
Endpoint No. = 1, IN endpoint
3
bmAttributes
1
03h
Endpoint attributes = b00000011, Transfer type = Interrupt
4
wMaxPacketSize
2
0001h
Max. packet size this endpoint is capable of sending = 1 byte
6
bInterval
1
FFh
Interval for polling endpoint for data transfer = 255 ms
Offset
0
Field
bLength
Size
1
Value
09h
Description
No. of bytes in this descriptor = 9
1
bDescriptorType
1
29h
Hub descriptor type
2
bNbrPorts
1
04h/05h
No. of downstream ports
3
wHubCharacteristics
2
0000h /
0004h/
0009h/
000Dh
Hub’s characteristics
Power Switching Mode:
BIT1..BIT0 = 00: Ganged Power Switching
BIT1..BIT0 = 01: Individual Port Power Switching
Compound Device:
BIT2=0: Not Compound Device
BIT2=1: Compound Device
Overcurrent Protection Mode:
BIT4..BIT3=00: Global Overcurrent Protection
BIT4..BIT3=01: Individual Port Overcurrent Protection
5
bPwrOn2PwrGood
1
32h
Time from the power on to power good = 100 ms
6
bHubContrCurrent
1
64h
Maximum current requirements of the Hub controller
electronics
64h: 100 mA
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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PDF描述
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