Host Control (HC) Operational Registers
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor 12-27
Bits Name Description
0:10 — Reserved
11 PRSC PortResetStatusChange—bit is set at the end of the 10 ms port reset signal.
Writing 1 clears this bit.
Writing 0 has no effect.
0 = Port reset not complete
1 = Port reset complete
12 OCIC PortOverCurrentIndicator Change—bit is valid only if overcurrent conditions are reported on a
per-port basis. This bit is set when Root Hub changes the PortOverCurrent Indicator bit.
Writing 1 clears this bit.
Writing 0 has no effect.
0 = No change in POCI
1 = POCI has changed
13 PSSC PortSuspendStatusChange—bit is set when the full resume sequence completes. Sequence
includes a 20s resume pulse, LS EOP, and 3ms resychronization delay.
Writing 1 clears this bit.
Writing 0 has no effect.
This bit is also cleared when ResetStatus Change is set.
0 = Resume not complete
1 = Resume complete
14 PESC PortEnable StatusChange—bit is set when hardware events cause the PES bit to be cleared.
Writing 1clears this bit.
Writing 0 has no effect.
0 = No change in PES
1 = Change in PES
15 CSC ConnectStatusChange—bit is set whenever a connect or disconnect event occurs.
Writing 1 clears this bit.
Writing 0 has no effect.
If CCS is cleared when a SetPortReset, Set PortEnable, or SetPort Suspend write occurs, this
bit is set to force the driver to re-evaluate the connection status since these writes should not
occur if the port is disconnected.
0 = No change in CCS
1 = Change in CCS
If the DeviceRemovable[NDP ] bit is set, this bit is set only after a Root Hub reset to notify the
system that the device is attached.
16:21 — Reser ved
22 LSDA Low SpeedDeviceAttached ( read)—bit indicates the speed of the device attached to this por t.
0 = Full speed device attached
1 = Low speed device attached
This field is valid only when CurrentConnectStatus is set.
ClearPortPower (write)
Writing 1 causes HC to clear the PortPowerStatus bit.
Writing 0 has no effect.