LM3S308 Luminary Micro, Inc, LM3S308 Datasheet - Page 124
LM3S308
Manufacturer Part Number
LM3S308
Description
Lm3s308 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S308.pdf
(419 pages)
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Reset
Reset
Type
Type
Internal Memory
Flash Memory Protection Read Enable (FMPRE)
Base 0x400F.E000
Offset 0x130
Type R/W, reset 0x8000.00FF
124
Bit/Field
31:0
R/W
R/W
31
15
1
0
R/W
R/W
Register 8: Flash Memory Protection Read Enable (FMPRE), offset 0x130
Note:
This register stores the read-only protection bits for each 2-KB flash block (see the FMPPE registers
for the execute-only protection bits). This register is loaded during the power-on reset sequence.
The factory settingsare a value of 1 for all implemented banks. This implements a policy of open
access and programmability. The register bits may be changed by writing the specific register bit.
However, this register is R/W0; the user can only change the protection bit from a 1 to a 0 (and may
NOT change a 0 to a 1). The changes are not permanent until the register is committed (saved), at
which point the bit change is permanent. If a bit is changed from a 1 to a 0 and not committed, it
may be restored by executing a power-on reset sequence. For additional information, see the “Flash
Memory Protection” section.
30
14
0
0
READ_ENABLE
R/W
R/W
29
13
0
0
Name
Offset is relative to System Control base address of 0x400FE000.
R/W
R/W
28
12
0
0
R/W
R/W
27
11
0
0
Type
R/W
R/W
R/W
26
10
0
0
0x800000FF
R/W
R/W
Reset
25
0
9
0
Preliminary
READ_ENABLE
READ_ENABLE
R/W
R/W
24
0
8
0
Description
Flash Read Enable
Each bit position maps 2 Kbytes of Flash to be read-enabled.
Value
0x800000FF
R/W
R/W
23
0
7
1
R/W
R/W
22
0
6
1
Description
Enables 16 KB of flash.
R/W
R/W
21
0
5
1
R/W
R/W
20
0
4
1
R/W
R/W
19
0
3
1
R/W
R/W
18
0
2
1
R/W
R/W
17
0
1
1
June 04, 2008
R/W
R/W
16
0
0
1
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