PDIUSBH11A データシートの表示（PDF） - Philips Electronics

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PDIUSBH11A

Universal Serial Bus Hub

Philips Electronics 

Philips Semiconductors

Universal Serial Bus Hub

Product specification

PDIUSBH11A

Get Port Status

Command

Data

: E0h–E3h

: Read 1 or 2 bytes

The Get Port Status Command can be followed by one or two data

reads. The first byte returned contains the port status. The second

byte returned is the port status change byte.

Port Status Byte

76 54 32 1 0

X0 00 0000

POWER ON VALUE

CONNECT

ENABLED

SUSPEND

OVERCURRENT

RESET

POWER

LOW SPEED

RESERVED

SV00846

Connect

Enabled

Suspend

OverCurrent

Reset

Power

Low Speed

A ‘1’ indicates that a device is connected on

this port of the hub.

A ‘1’ indicates that this port is enabled.

A ‘1’ indicates that this port is suspended.

A ‘1’ indicates that overcurrent condition

exists on this port. In mode 0 of operation,

this bit is the same for all ports. In mode 1,

individual port overcurrent indication is

possible.

A ‘1’ indicates that bus reset on this port is in

progress. When reset is completed (nominal

duration of 10 ms), this bit indicates a ‘0’.

A ‘1’ indicates that power is supplied to

downstream ports. Since the PDIUSBH11A

supports gang mode power switching, this

bit is the same for all ports.

A ‘1’ indicates that low speed device is

connected to this port. This bit is only valid

when Connect bit is a ‘1’.

Port Status Change Byte

The description for the Port Status Change Byte is similar to the Port

Status Byte except that the value of the bits are ‘1’ only when a

change has occurred.

76 54 32 1 0

XX X0 0 0 0 0

POWER ON VALUE

CONNECT

ENABLED

SUSPEND

OVERCURRENT

RESET

RESERVED

SV00847

Set Status Change Bits

Command

Data

: F7h

: Write 1 byte

For assembling the hub’s status change register, the device needs

some additional information from the controller, i.e. the Local Power

Status Change bit and the embedded function Status Change bit.

These are provided by the Set Status Change Bits command. This

command is always followed by one data write which contains the

Local Power Status Change bit at the LSB and the embedded

function Status Change bit at position 1. All other bits should be 0.

76 54 32 1 0

XX XX 0 0 0 0

POWER ON VALUE

LOCAL POWER

EMBEDDED FUNCTION 1

EMBEDDED FUNCTION 6

EMBEDDED FUNCTION 7

RESERVED

SV00848

1999 Jul 22

16

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