CS5530A datasheet(217/259 Pages) NSC

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Offset 54h-57h

HcRhPortStatus[1] Register (R/W)

Reset Value = 00000628h

31:21

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. Writinga1clearsthisbit. 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.

15:10

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.

Note: 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.

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.

Note: 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.

Table 4-26. USB BAR+Memory Offset xxh: USB Controller Registers (Continued)

Bit

Description

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