Download SH7760 Group USB Host Module Application Note

Read/Write
Key
Reset
HCD
HC
Description
CSC
0b
R/W
R/W
ConnectStatusChange
This bit is set whenever a connect or disconnect event
occurs. The HCD writes a ‘1’ to clear this bit. Writing a ‘0’ has
no effect. If CurrentConnectStatus is cleared when a
SetPortReset, SetPortEnable, or SetPortSuspend 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 CurrentConnectStatus
1: Change in CurrentConnectStatus
Note: If the DeviceRemovable[NDP] bit is set, this bit is set
only after a Root Hub reset to inform the system that the
device is attached.
PESC
0b
R/W
R/W
PortEnableStatusChange
This bit is set when hardware events cause the
PortEnableStatus bit to be cleared. Changes from HCD writes
do not set this bit. The HCD writes a ‘1’ to clear this bit.
Writing a ‘0’ has no effect.
0: No change in PortEnableStatus
1: Change in PortEnableStatus
PSSC
0b
R/W
R/W
PortSuspendStatusChange
This bit is set when the full resume sequence has been
completed. This sequence includes the 20-msec resume
pulse, LS EOP, and 3-mssec resychronization delay. The
HCD writes a ‘1’ to clear this bit. Writing a ‘0’ has no effect.
This bit is also cleared when ResetStatusChange is set.
0: Resume is not completed
1: Resume completed
OCIC
0b
R/W
R/W
PortOverCurrentIndicatorChange
This bit is valid only if overcurrent conditions are reported on
a per-port basis. This bit is set when Root Hub changes the
PortOverCurrentIndicator bit. The HCD writes a ‘1’ to clear
this bit. Writing a ‘0’ has no effect.
0: no change in PortOverCurrentIndicator
1: PortOverCurrentIndicator has changed
Rev. 1.00, 10/03, page 50 of 90