TM4C129DNCZAD Datasheet, PDF (376/1967 Pages) Texas Instruments – Tiva Microcontroller

System Control
Register 77: Universal Serial Bus Software Reset (SRUSB), offset 0x528
The SRUSB register provides software the capability to reset the available USB module.
A peripheral is reset by software using a simple two-step process:
1. Software sets a bit (or bits) in the SRUSB register. While the SRUSB bit is 1, the peripheral is
held in reset.
2. Software completes the reset process by clearing the SRUSB bit.
There may be latency from the clearing of the SRUSB bit to when the peripheral is ready for use.
Software should check the corresponding PRUSB bit to verify that the USB Module registers are
ready to be accessed.
Important: This register should be used to reset the USB module.
Universal Serial Bus Software Reset (SRUSB)
Base 0x400F.E000
Offset 0x528
Type RW, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
R0
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RW
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:1
0
Name
reserved
R0
Type
RO
RW
Reset
0
0
Description
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.
USB Module Software Reset
Value Description
0 USB module is not reset.
1 USB module is reset.
376
June 18, 2014
Texas Instruments-Production Data