Rainbow Electronics W90N740 - Manual (Page 157)

W90N740
Publication Release Date: November 26, 2004
- 153 - Revision A4
Register: HcRhPortStatus[1:2]
Bits Reset R/W Description
7-5 0h - Reserved. Read/Write 0's
8 0 R/W
(Read) PortPowerStatus
This bit reflects the power state of the port regardless of the power
switching mode.
0 = Port power is off.
1 = Port power is on.
Note: If NoPowerSwitching is set, this bit is always read as '1'.
(Write) SetPortPower
Writing a '1' sets PortPowerStatus. Writing a '0' has no effect.
9 0 R/W
(Read) LowSpeedDeviceAttached
This bit defines the speed (and bud idle) of the attached device. It is only
valid when CurrentConnectStatus is set.
0 = Full Speed device
1 = Low Speed device
(Write) ClearPortPower
Writing a '1' clears PortPowerStatus. Writing a '0' has no effect
15-10 0h - Reserved. Read/Write 0's
16 0 R/W
ConnectStatusChange
This bit indicates a connect or disconnect event has been detected.
Writing a '1' clears this bit. Writing a '0' has no effect.
0 = No connect/disconnect event.
1 = Hardware detection of connect/disconnect event.
Note: If DeviceRemoveable is set, this bit resets to '1'.
17 0 R/W
PortEnableStatusChange
This bit indicates that the port has been disabled due to a hardware event
(cleared PortEnableStatus).
0 = Port has not been disabled.
1 = PortEnableStatus has been cleared.
18 0 R/W
PortSuspendStatusChange
This bit indicates the completion of the selective resume sequence for the
port.
0 = Port is not resumed.
1 = Port resume is complete.
19 0 R/W
PortOverCurrentIndicatorChange
This bit is set when OverCurrentIndicator changes. Writing a '1' clears
this bit. Writing a '0' has no effect.
20 0 R/W
PortResetStatusChange
This bit indicates that the port reset signal has completed.
0 = Port reset is not complete.
1 = Port reset is complete.
31-21 0h - Reserved. Read/Write 0's