TM4C1233C3PM Datasheet, PDF (72/1214 Pages) Texas Instruments – Tiva Microcontroller

The Cortex-M4F Processor
Register 15: Link Register (LR)
The Link Register (LR) is register R14, and it stores the return information for subroutines, function
calls, and exceptions. The Link Register can be accessed from either privileged or unprivileged
mode.
EXC_RETURN is loaded into the LR on exception entry. See Table 2-10 on page 104 for the values
and description.
Link Register (LR)
Type RW, reset 0xFFFF.FFFF
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
LINK
Type RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
LINK
Type RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
Reset
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Bit/Field
31:0
Name
LINK
Type
Reset Description
RW 0xFFFF.FFFF This field is the return address.
72
June 12, 2014
Texas Instruments-Production Data