| 31-10 |
RESERVED |
R |
0x0 |
|
| 9-8 |
PFLTACT |
R/W |
0x0 |
Power Fault Action.
This bit field specifies how the USB0EPEN signal is changed when detecting a USB power fault.
0x0 = Unchanged. USB0EPEN is controlled by the combination of the EPEN and EPENDE bits.
0x1 = Tristate. USB0EPEN is undriven (tristate).
0x2 = Low. USB0EPEN is driven Low.
0x3 = High. USB0EPEN is driven High.
|
| 7 |
RESERVED |
R |
0x0 |
|
| 6 |
PFLTAEN |
R/W |
0x0 |
Power Fault Action Enable.
This bit specifies whether a USB power fault triggers any automatic corrective action regarding the driven state of the USB0EPEN signal.
0x0 = Disabled. USB0EPEN is controlled by the combination of the EPEN and EPENDE bits.
0x1 = Enabled. The USB0EPEN output is automatically changed to the state specified by the PFLTACT field.
|
| 5 |
PFLTSEN |
R/W |
0x0 |
Power Fault Sense.
This bit specifies the logical sense of the USB0PFLT input signal that indicates an error condition.
The complementary state is the inactive state.
0x0 = Low Fault. If USB0PFLT is driven Low, the power fault is signaled internally (if enabled by the PFLTEN bit).
0x1 = High Fault. If USB0PFLT is driven High, the power fault is signaled internally (if enabled by the PFLTEN bit).
|
| 4 |
PFLTEN |
R/W |
0x0 |
Power Fault Input Enable.
This bit specifies whether the USB0PFLT input signal is used in internal logic.
0x0 = Not Used. The USB0PFLT signal is ignored.
0x1 = Used. The USB0PFLT signal is used internally.
|
| 3 |
RESERVED |
R |
0x0 |
|
| 2 |
EPENDE |
R/W |
0x0 |
EPEN Drive Enable.
This bit specifies whether the USB0EPEN signal is driven or undriven (tristate).
When driven, the signal value is specified by the EPEN field.
When not driven, the EPEN field is ignored and the USB0EPEN signal is placed in a high-impedance state.
The USB0EPEN signal is undriven at reset because the sense of the external power supply enable is unknown.
By adding the high-impedance state, system designers may bias the power supply enable to the disabled state using a large resistor (100 kohm) and later configure and drive the output signal to enable the power supply.
0x0 = Not Driven. The USB0EPEN signal is high impedance.
0x1 = Driven. The USB0EPEN signal is driven to the logical value specified by the value of the EPEN field.
|
| 1-0 |
EPEN |
R/W |
0x0 |
External Power Supply Enable Configuration.
This bit field specifies and controls the logical value driven on the USB0EPEN signal.
0x0 = Power Enable Active Low. The USB0EPEN signal is driven Low if the EPENDE bit is set.
0x1 = Power Enable Active High. The USB0EPEN signal is driven High if the EPENDE bit is set.
0x2 = Power Enable High if VBUS Low. The USB0EPEN signal is driven High when the A device is not recognized.
0x3 = Power Enable High if VBUS High. The USB0EPEN signal is driven High when the A device is recognized.
|