SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 298

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Core Logic Module
Note:
Offset 5Ch-5Fh
31:21
15:10
Bit
20
19
18
17
16
4
3
2
1
0
This register is reset by the UsbReset state.
Description
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.
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.
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.
Read: PortEnableStatus.
0: Port disabled.
1: Port enabled.
Write: SetPortEnable. Writing a 1 sets PortEnableStatus. Writing a 0 has no effect.
Read: CurrentConnectStatus.
0: No device connected.
1: Device connected.
If DeviceRemoveable is set (not removable) this bit is always 1.
Write: ClearPortEnable. Writing 1 a clears PortEnableStatus. Writing a 0 has no effect.
Reserved. Read/Write 0s.
PortResetStatusChange. This bit indicates that the port reset signal has completed.
0: Port reset is not complete.
1: Port reset is complete.
PortOverCurrentIndicatorChange. This bit is set when OverCurrentIndicator changes. Writing a 1 clears this bit. Writing
a 0 has no effect.
PortSuspendStatusChange. This bit indicates the completion of the selective resume sequence for the port.
0: Port is not resumed.
1: Port resume is complete.
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.
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.
Reserved. Read/Write 0s.
Table 5-42. USB_BAR+Memory Offset: USB Controller Registers (Continued)
(Continued)
HcRhPortStatus[3] Register (R/W)
298
Reset Value = 00000000h
Revision 3.0