PRELIMINARYCY7C656xx
tems that do not accept this, the IllegalHubDescriptor con- figuration bit may be set to allow CY7C656xx to accept a DescriptorType of 0x00 for this command. Default is 0, rec- ommended setting is 1.
Bit 6: CompoundDevice: Indicates whether the hub is part of a compound device. This is reported in the HubDescrip- tor,
Bit 5: Fullspeed: Only configures the hub to be a
Bit 4: NoPortIndicators: Turns off the port indicators and does not report them as present in the HubDescriptor, wHubCharacteristics b7 field. Default set to 0.
Bit 3: Reserved. Should be set to 0.
Bit 2: GangPowered: Indicates whether the port power switching is ganged (set to 1) or
Bit 1: SingleTTOnly: Indicates that the hub should only sup- port single Transaction Translator mode. This changes var- ious descriptor values. Default set to 0.
Bit 0: Reserved. Default set to 0.
Byte 18: AmberPolarity, GreenPolarity, SelfPowerable,
ModulateIndicators, PowerControlPolarity, OverCurrent-
Polarity, OverCurrentMode1, OverCurrentMode2
Bit 7:
Bit 6:
Bit 5:
Bit 4:
Bit 3:
Bit 2:
Bit 1:
Bit 0:
0)is set to ‘1’, the hub reports
Byte 19: Write Protect
Byte 20: NumLangs
Number of supported string languages. CHC supports a maximum of 31 languages; if this field is set to 0 or a num- ber larger than 31, all string support will be disabled.
Byte 21: SupportedStrings
This field contains a bitmap of strings supported by the hub. A set bit indicates that the standard string is supported. A bit not set indicates that the string is not supported. The hub controller will return a
Bit Name | Description |
7 reserved
6iInterface (1) The iInterface string index reported in the second interface descriptor (alternate setting 1).
5iInterface (0) The iInterface string index reported in the first interface descriptor (alternate setting 0).
4iConfiguration
3iConfiguration
2 | iSerialNumber | The | iSerialNumber | string | index |
|
| reported in the device descriptor. |
| ||
1 | iProduct | The iProduct string index reported in | |||
|
| the device descriptor. |
|
| |
0 | iManufacturer | The | iManufacturer | string | index |
|
| reported in the device descriptor. |
|
Document #: | Page 15 of 23 |