Samsung S5PC100 User Manual page 842

USB HOST CONTROLLER
UHCRHPSTAT2
PRS
POCI
PSS
PES
8.9-42
Bit
[4] (read) PortResetStatus / (write) SetPortReset
If this bit is set by an HCD write to set port reset, port
reset signaling is asserted. If reset is completed, this bit
is cleared when PortResetStatusChange is set. This bit
cannot be set if CurrentConnectStatus is cleared. The
HCD sets the port reset signaling by writing a 1 to this
bit. Writing a 0 has no effect. If CurrentConnectStatus is
cleared, this write does not set port-reset status, but
instead sets connect-status-change. This informs the
driver that it attempted to reset a disconnected port.
0 = Port reset signal is not active.
1 = Port reset signal is active.
[3] (read) PortOverCurrentIndicator / (write)
ClearSuspendStatus
If read, this bit is valid only when the root hub is
configured in such a way that over-current conditions
are reported on a per-port basis. If per-port over-current
reporting is not supported, this bit is forced to 0. If this
bit is cleared, all power operations are normal for this
port. If set, an over-current condition exists on this port.
This bit always reflects the over-current input signal.
The HCD writes a 1 to this bit to initiate a resume.
Writing a 0 has no effect. A resume is initiated only if
PortSuspendStatus is set.
0 = No over-current condition.
1 = Over-current condition detected.
[2] (read) PortSuspendStatus / (write) SetPortSuspend
This bit indicates if the port is suspended or in the
resume sequence (1). If it is a 0, the port is not
suspended or in the resume sequence. It is set by a set
suspend state write and cleared if PortSuspendStatus
change is set at the end of the resume interval. This bit
cannot be set if CurrentConnectStatus is cleared. This
bit is also cleared if PortResetStatus change is set at
the end of the port reset, or if the UHC is placed in the
USBRESUME state. If an upstream resume is in
progress, it must propagate to the HC. The HCD sets
the PortSuspendStatus bit by writing a 1 to this bit.
Writing a 0 has no effect. If CurrentConnectStatus is
cleared, this write does not set PortSuspendStatus;
instead it sets ConnectStatusChange. This informs the
driver that it attempted to suspend a disconnected port.
0 = Port is not suspended.
1 = Port is suspended.
[1] (read) PortEnableStatus / (write) SetPortEnable
This bit indicates whether the port is enabled (1) or
disabled (0). The root hub clears this bit if an over-
current condition, disconnect event, switched-off power,
or operational bus error, such as babble, is detected.
Description
S5PC100 USER'S MANUAL (REV1.0)
R/W Reset Value
R/W
R/W
R/W
R/W