TM4C129EKCPDT Datasheet, PDF (516/2012 Pages) Texas Instruments – Tiva Microcontroller

System Control
Register 171: Inter-Integrated Circuit Peripheral Ready (PRI2C), offset 0xA20
The PRI2C register indicates whether the I²C modules are 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 PCI2C bit is changed from 0 to 1. A Run mode clocking change is initiated if the
corresponding RCGCI2C bit is changed. A reset change is initiated if the corresponding SRI2C bit
is changed from 0 to 1.
The PRI2C bit is cleared on any of the above events and is not set again until the module is
completely powered, enabled, and internally reset.
Inter-Integrated Circuit Peripheral Ready (PRI2C)
Base 0x400F.E000
Offset 0xA20
Type RO, 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
R9
R8
R7
R6
R5
R4
R3
R2
R1
R0
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
Bit/Field
31:10
9
Name
reserved
R9
Type
RO
RO
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.
I²C Module 9 Peripheral Ready
Value Description
0
I²C module 9 is not ready for access. It is unclocked, unpowered,
or in the process of completing a reset sequence.
1
I²C module 9 is ready for access.
8
R8
RO
0
I²C Module 8 Peripheral Ready
Value Description
0
I²C module 8 is not ready for access. It is unclocked, unpowered,
or in the process of completing a reset sequence.
1
I²C module 8 is ready for access.
7
R7
RO
0
I²C Module 7 Peripheral Ready
Value Description
0
I²C module 7 is not ready for access. It is unclocked, unpowered,
or in the process of completing a reset sequence.
1
I²C module 7 is ready for access.
516
June 18, 2014
Texas Instruments-Production Data