294
AMD Geode™ SC1200/SC1201 Processor Data Book
Core Logic Module - USB Controller Registers - PCIUSB
32579B
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.
1
Read: PortEnableStatus.
0: Port disabled.
1: Port enabled.
Write: SetPortEnable.
Writing a 1 sets PortEnableStatus. Writing a 0 has no effect.
0
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.
Note:
This register is reset by the UsbReset state.
Offset 60h-9Fh
Reserved
Reset Value = xxh
Table 6-42. Memory Offset: USB Controller Registers (Continued)
Bit
Description
Summary of Contents for Geode SC1200
Page 8: ...8 AMD Geode SC1200 SC1201 Processor Data Book List of Figures 32579B...
Page 16: ...16 AMD Geode SC1200 SC1201 Processor Data Book Overview 32579B...
Page 24: ...24 AMD Geode SC1200 SC1201 Processor Data Book Architecture Overview 32579B...
Page 364: ...364 AMD Geode SC1200 SC1201 Processor Data Book Debugging and Monitoring 32579B...