USB.Rev1.0



11-9.

0

bDescLength

1

, .

1

bDescriptorType

1

2

bNbrPorts

1

downstream , .

3

wHubCharacteristics

2

D1..D0:

00 - (

)

01 -

1X - (

, ,

).

D2:

0 - -

1 - -

D4..D3:

00 - .


,

.

01 - .


. .

1X - .


,

.

D15..D5:

5

bPwrOn2PwrGood

1

( 2 ) , . , , .

6

bHubContrCurrent

1

mA.

7

DeviceRemovable

, . - , .( an insertion change notification.) . , , 0.

:

0 -

1 - ( )

:

Bit 0:

Bit 1: 1

Bit 2: 2

..

n: n ( , 255 ).

Variable

PortPwrCtrlMask

, . , , SetPortFeature (PORT_POWER), .

:

0 -

.

1 - .

, . .

:

Bit 0:

Bit 1: 1

Bit 2: 2

..

n: n ( , 255 ).