NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 769 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
[9]
LSDA
(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
[8]
PPS
(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.
[4]
PRS
(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]
POCI
(Read) PortOverCurrentIndicator
-2 supports global over-current reporting. 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]
PSS
(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]
PES
(Read) PortEnableStatus
0 = Port disabled.
1 = Port enabled.
(Write) SetPortEnable
Writing a '1' sets PortEnableStatus. Writing a '0' has no effect.
[0]
CCS
(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.