LM3S2B93 Datasheet, PDF (171/1194 Pages) Texas Instruments – Stellaris® LM3S2B93 Microcontroller

Stellaris^® LM3S2B93 Microcontroller
Register 46: MPU Region Number (MPUNUMBER), offset 0xD98
Note: This register can only be accessed from privileged mode.
The MPUNUMBER register selects which memory region is referenced by the MPU Region Base
Address (MPUBASE) and MPU Region Attribute and Size (MPUATTR) registers. Normally, the
required region number should be written to this register before accessing the MPUBASE or the
MPUATTR register. However, the region number can be changed by writing to the MPUBASE
register with the VALID bit set (see page 172). This write updates the value of the REGION field.
MPU Region Number (MPUNUMBER)
Base 0xE000.E000
Offset 0xD98
Type R/W, 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
NUMBER
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:3
2:0
Name
reserved
NUMBER
Type
Reset Description
RO 0x0000.000 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.
R/W
0x0
MPU Region to Access
This field indicates the MPU region referenced by the MPUBASE and
MPUATTR registers. The MPU supports eight memory regions.
January 20, 2012
171
Texas Instruments-Production Data