UPD72012 Ver la hoja de datos (PDF) - NEC => Renesas Technology
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UPD72012 Datasheet PDF : 36 Pages
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µPD72012
2.3 Standard Interface Descriptor
No.
Field
0 bLength
1 bDescriptorType
2 bInterfaceNumber
3 bAlternateSetting
4 bNumEndpoints
5 bIntefaceClass
6 bInterfaceSubClass
7 bInterfaceProtocol
8 iInteface
Size
(Bytes)
Contents
Value
Standard ROM code
product
003
004
Mask
ROM code
product
1 Shows the size in bytes of the standard interface
descriptor.
0x09
0x09
0x09
1 Shows that this is a standard interface descriptor.
0x04
0x04
0x04
1 If there are multiple interfaces, the host specifying
this value in a Set_Interface request selects this
interface.
This is “0x00” for the µPD72012.
0x00
0x00
0x00
1 This value is used if there is an alternate setting of
the interface. It is “0x00” for the µPD72012.
0x00
0x00
0x00
1 Shows the number of endpoints defined in this
interface.
0x01
0x01
0x01
1 HUB class code defined by USB
(HUB_CLASSCODE=“0x09”).
0x09
0x09
0x09
1 HUB subclass code defined by USB.
0x00
0x00
0x00
1 Protocol code defined by USB. Not defined in HUB
class.
0x00
0x00
0x00
1 Shows the index of the string descriptor for a
0x00
comment about the interface of a product using the
HUB.
Since not used for a standard ROM code product
(003, 004), its value is “0x00”.
When using this for a Mask ROM code product, set it
to “0x05”.
0x00
0x00
or
0x05
16
Data Sheet S13918EJ3V0DS
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