LM3S2139 Luminary Micro, Inc, LM3S2139 Datasheet - Page 133

• Manufacturer Part Number: LM3S2139
• Description: Lm3s2139 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
User Register 1 (USER_REG1)
Base 0x400F.E000
Offset 0x1E4
Type R/W, reset 0xFFFF.FFFF
July 25, 2008
Bit/Field
30:0
31
R/W
R/W
NW
31
15
1
1
R/W
R/W
Register 12: User Register 1 (USER_REG1), offset 0x1E4
Note:
This register provides 31 bits of user-defined data that is non-volatile and can only be written once.
Bit 31 indicates that the register is available to be written and is controlled through hardware to
ensure that the register is only written once. The write-once characteristics of this register are useful
for keeping static information like communication addresses that need to be unique per part and
would otherwise require an external EEPROM or other non-volatile device.
30
14
1
1
R/W
R/W
29
13
1
1
Name
DATA
Offset is relative to System Control base address of 0x400FE000.
NW
R/W
R/W
28
12
1
1
R/W
R/W
27
11
1
1
Type
R/W
R/W
R/W
R/W
26
10
1
1
0x7FFFFFFF
Reset
R/W
R/W
25
1
9
1
1
Preliminary
R/W
R/W
24
1
8
1
Description
Not Written
Specifies that this 32-bit dword has not been written.
User Data
Contains the user data value. This field is initialized to all 1s and can
only be written once.
DATA
DATA
R/W
R/W
23
1
7
1
R/W
R/W
22
1
6
1
R/W
R/W
21
1
5
1
R/W
R/W
20
1
4
1
LM3S2139 Microcontroller
R/W
R/W
19
1
3
1
R/W
R/W
18
1
2
1
R/W
R/W
17
1
1
1
R/W
R/W
16
1
0
1
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