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參數(shù)資料
| 型號： | UPD72012GB-003 |
| 廠商： | NEC Corp. |
| 英文描述： | HUB CONTROLLER FOR UNIVERSAL SERIAL BUS |
| 中文描述： | 集線器控制器通用串行總線 |
| 文件頁數(shù)： | 12/36頁 |
| 文件大?。?/td> | 414K |
| 代理商： | UPD72012GB-003 |
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12
Data Sheet S13918EJ3V0DS
μ
PD72012
2. DESCRIPTORS
Caution
For a Mask ROM code product, we release the software to make a data for Mask ROM option.
Please contact to Local NEC to get the software if you would like to make Mask ROM code
product.
2.1 Standard Device Descriptor
(1/2)
Value
Standard ROM code
product
No.
Field
Size
(Bytes)
Contents
003
004
Mask
ROM code
product
0
bLength
1
Shows the size in bytes of the standard device
descriptor.
0x12
0x12
0x12
1
bDescriptorType
1
Shows that this is a standard device descriptor.
0x01
0x01
0x01
2
bcdUSB
2
Shows that the
μ
PD72012 compliant with USB
Specifications Revision 1.1.
0x0110
0x0110
0x0110
4
bDeviceClass
1
HUB class code defined by USB
(HUB_CLASSCODE=“0x09”).
0x09
0x09
0x09
5
bDeviceSubClass
1
HUB subclass code defined by USB. Not defined in
HUB class.
0x00
0x00
0x00
6
bDeviceProtocol
1
Protocol code defined by USB. Not defined in HUB
class.
0x00
0x00
0x00
7
bMaxPacketSize0
1
Shows the maximum packet size in bytes of
endpoint 0 of the
μ
PD72012.
0x08
0x08
0x08
8
idVendor
2
Shows the vendor ID code registered in USB
standards.
For a standard ROM code product (003, 004), this is
“0x0409” (NEC vendor ID).
When using in a Mask ROM code product, set a
vendor ID for each manufacturer registered in USB
standards.
0x0409
0x0409
0xXXXX
10
IdProduct
2
Shows the product ID code registered in USB
standards.
For a standard ROM code product (003, 004), this is
“0x55AB” (Generic_HUB).
In a Mask ROM code product, this value can be set
as you wish.
0x55AB
0x55AB
0xXXXX
12
bcdDevice
2
Shows the version number of the
μ
PD72012 using
decimal notation in XX.XX format.
For a standard ROM code product (003, 004), this is
“0x0200” (Ver. 2.0).
When using in a Mask ROM code product, manage
by varying the number for each ROM code.
0x0200
0x0200
0xXXXX
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| UPD720012 | HUB CONTROLLER FOR UNIVERSAL SERIAL BUS |
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| UPD72012CU-XXX | HUB CONTROLLER FOR UNIVERSAL SERIAL BUS |
| UPD72012GB-XXX | HUB CONTROLLER FOR UNIVERSAL SERIAL BUS |
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| UPD720130GC-9EU-A | 制造商:NEC Electronics Corporation 功能描述:BRIDGE USB TO IDE SMD TQFP100 |
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