SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 296
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SC2200
Manufacturer Part Number
SC2200
Description
Thin Client On a Chip
Manufacturer
NSC [National Semiconductor]
Datasheet
1.SC2200.pdf
(433 pages)
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Core Logic Module
Note:
Offset 54h-57h
31:21
15:10
7:5
Bit
20
19
18
17
16
1
0
9
8
4
3
This register is reset by the UsbReset state.
Description
OverCurrentIndicator. This bit reflects the state of the OVRCUR pin. This field is only valid if NoOverCurrentProtection
and OverCurrentProtectionMode are cleared.
0: No over-current condition.
1:Over-current condition.
Read: LocalPowerStatus. Not Supported. Always read 0.
Write: ClearGlobalPower. Writing a 1 issues a ClearGlobalPower command to the ports. 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.
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.
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.
Reserved. Read/Write 0s.
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.
Table 5-42. USB_BAR+Memory Offset: USB Controller Registers (Continued)
(Continued)
HcRhPortStatus[1] Register (R/W)
296
Reset Value = 00000000h
Revision 3.0
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