Register 172: Universal Serial Bus Peripheral Ready (PRUSB), offset 0xA28
The PRUSB register indicates whether the USB module is ready to be accessed by software following
a change in status of power, Run mode clocking, or reset. A power change is initiated if the
corresponding PCUSB bit is changed from 0 to 1. A Run mode clocking change is initiated if the
corresponding RCGCUSB bit is changed. A reset change is initiated if the corresponding SRUSB
bit is changed from 0 to 1.
The PRUSB bit is cleared on any of the above events and is not set again until the module is
completely powered, enabled, and internally reset.
Universal Serial Bus Peripheral Ready (PRUSB)
Base 0x400F.E000
Offset 0xA28
Type RO, reset 0x0000.0000
16171819202122232425262728293031
reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
0123456789101112131415
R0reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0ROreserved31:1
USB Module Peripheral Ready
DescriptionValue
The USB module is not ready for access. It is unclocked,
unpowered, or in the process of completing a reset sequence.
0
The USB module is ready for access.1
0ROR00
June 18, 2014512
Texas Instruments-Production Data
System Control
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