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Register: HcRhPortStatus[1:2]
Bits
Reset
8
0
7 - 5
0h
4
0
3
0
2
0
1
0
0
0
Rev. 3.0, 03/01, page 332 of 390
Offset: 54-57,58-5B
R/W
Description
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.
-
Reserved. Read/Write 0's
R/W
(read) PortResetStatus
0 = Port reset signal is not active.
1 = Port reset signal is active.
(write) SetPortReset
Writing a '1' sets PortResetStatus. Writing a '0' has no effect.
R/W
(read) PortOverCurrentIndicator
USB Host Controller supports global over-current reporting. This bit
reflects the state of the OVRCUR pin dedicated to this port. This field is
only valid if NoOverCurrentProtection is cleared and
OverCurrentProtectionMode is set.
0 = No over-current condition
1 = Over-current condition
(write) ClearPortSuspend
Writing a '1' initiates the selective resume sequence for the port.
Writing a '0' has no effect.
R/W
(read) PortSuspendStatus
0 = Port is not suspended
1 = Port is selectively suspended
(write) SetPortSuspend
Writing a '1' sets PortSuspendStatus. Writing a '0' has no effect.
R/W
(read) PortEnableStatus
0 = Port disabled.
1 = Port enabled.
(write) SetPortEnable
Writing a '1' sets PortEnableStatus. Writing a '0' has no effect.
R/W
(read) CurrentConnectStatus
0 = No device connected.
1 = Device connected.
Note: If DeviceRemoveable is set (not removable) this bit is always '1'.
(write) ClearPortEnable
Writing a '1' clears PortEnableStatus. Writing a '0' has no effect.
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