UPD72012 View Datasheet(PDF) - NEC => Renesas Technology
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UPD72012 Datasheet PDF : 36 Pages
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µPD72012
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
No.
Field
Size
(Bytes)
Contents
0 bLength
1 bDescriptorType
2 bcdUSB
4 bDeviceClass
5 bDeviceSubClass
6 bDeviceProtocol
7 bMaxPacketSize0
8 idVendor
10 IdProduct
12 bcdDevice
1 Shows the size in bytes of the standard device
descriptor.
1 Shows that this is a standard device descriptor.
2 Shows that the µPD72012 compliant with USB
Specifications Revision 1.1.
1 HUB class code defined by USB
(HUB_CLASSCODE=“0x09”).
1 HUB subclass code defined by USB. Not defined in
HUB class.
1 Protocol code defined by USB. Not defined in HUB
class.
1 Shows the maximum packet size in bytes of
endpoint 0 of the µPD72012.
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.
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.
2 Shows the version number of the µPD72012 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.
Value
Standard ROM code
product
003
004
0x12
0x12
0x01
0x0110
0x01
0x0110
0x09
0x09
0x00
0x00
0x00
0x00
0x08
0x08
0x0409 0x0409
0x55AB 0x55AB
0x0200 0x0200
(1/2)
Mask
ROM code
product
0x12
0x01
0x0110
0x09
0x00
0x00
0x08
0xXXXX
0xXXXX
0xXXXX
12
Data Sheet S13918EJ3V0DS
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