參數(shù)資料
型號(hào)： UPD72012GB-XXX-3B4
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(yè)數(shù)： 12/36頁(yè)
文件大小： 414K
代理商： UPD72012GB-XXX-3B4
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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