Datasheet
Table 9.3 - Standard Configuration Descriptor
OFFSET | FULL | HIGH | FIELD NAME | DESCRIPTION | |
SPEED | SPEED | ||||
0 | 09h | 09h | bLength | Size of this descriptor in bytes | |
1 | 02h | 02h | bDescriptorType | CONFIGURATION Descriptor Type | |
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| Total length of data returned for this | |
2,3 | yyyyh | yyyyh | wTotalLength | configuration | |
yyyyh = 0019h if OTG support is disabled. | |||||
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| yyyyh = 001Ch if OTG support is enabled. | |
4 | 01h | 01h | bNumInterfaces | Number of interfaces supported by this | |
configuration | |||||
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5 | 01h | 01h | bConfigurationValue | Value to use as an argument to the | |
SetConfiguration() request to select this | |||||
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| configuration. | |
6 | 00h | 00h | iConfiguration | Index of string descriptor describing this | |
configuration (string not supported) | |||||
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| The following values are derived from the OEM | |
| user/ | user/ |
| value: | |
7 | bmAttibutes | = A0h for | |||
signal | signal | ||||
| (Bitmap) | (Bitmap) |
| = E0h for | |
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| All other values are reserved. | |
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| If Dynamic Power support is disabled, this value | |
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| is derived from the OEM value for MaxPower | |
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| consumed from the bus by the hub in this | |
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| configuration. | |
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| If Dynamic Power support is enabled, the | |
8 | user | user | bMaxPower | USB20H04 must be configured for a | |
(mA) | (mA) | ||||
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| following values are reported for this field: | |
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| SELF_PWR = 0, OEM value reported. | |
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| SELF_PWR = 1, 02h (small upstream load for | |
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Table 9.4 - Other_Speed_Configuration Descriptor
| OFFSET | FULL | HIGH | FIELD NAME | DESCRIPTION |
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| SPEED | SPEED |
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| 0 | 09h | 09h | bLength | Size of this descriptor in bytes |
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| 1 | 07h | 07h | bDescriptorType |
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| Total length of data returned for this |
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| configuration |
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| 2,3 | yyyyh* | zzzzh | wTotalLength | zzzz = 0019h if single TT and OTG disabled. |
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| zzzz = 001Ch if single TT and OTG enabled. |
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| zzzz = 0029h if |
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| zzzz = 002Fh if |
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SMSC USB20H04 |
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| Page 29 | Revision 1.63 | |||
DATASHEET