AMD SC3200 manual HcRhPortStatus1 Register R/W Reset Value = 00000000h, Read PortResetStatus

		32581C	Core Logic Module - USB Controller Registers - PCIUSB
	Table 6-42. USB_BAR+Memory Offset: USB Controller Registers (Continued)
Bit	Description
Offset 54h-57h		HcRhPortStatus[1] Register (R/W)		Reset Value = 00000000h
31:21	Reserved. Read/Write 0s.
20	PortResetStatusChange. This bit indicates that the port reset signal has completed.
	0: Port reset is not complete.
	1: Port reset is complete.
19	PortOverCurrentIndicatorChange. This bit is set when OverCurrentIndicator changes. Writing a 1 clears this bit. Writing
	a 0 has no effect.
18	PortSuspendStatusChange. This bit indicates the completion of the selective resume sequence for the port.
	0: Port is not resumed.
	1: Port resume is complete.
17	PortEnableStatusChange. This bit indicates that the port has been disabled due to a hardware event (cleared PortEna-
	bleStatus).
	0: Port has not been disabled.
	1: PortEnableStatus has been cleared.
16	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.
	If DeviceRemoveable is set, this bit resets to 1.
15:10	Reserved. Read/Write 0s.
9	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.
8	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.
	If NoPowerSwitching is set, this bit is always read as 1.
	Write: SetPortPower. Writing a 1 sets PortPowerStatus. Writing a 0 has no effect.
7:5	Reserved. Read/Write 0s.
4	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.
3	Read: PortOverCurrentIndicator. 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.
2	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.
290			AMD Geode™ SC3200 Processor Data Book