Register 15: User Register 0 (USER_REG0), offset 0x1E0
Note: Offset is relative to System Control base address of 0x400FE000.
This register provides 31 bits of user-defined data that is non-volatile and can only be committed
once. Bit 31 indicates that the register is available to be committed and is controlled through hardware
to ensure that the register is only committed once. Prior to being committed, bits can only be changed
from 1 to 0. The reset value shown only applies to power-on reset; any other type of reset does not
affect this register. 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. Once committed, the only way to restore
the factory default value of this register is to perform the sequence detailed in “Recovering a "Locked"
Microcontroller” on page 169.
User Register 0 (USER_REG0)
Base 0x400F.E000
Offset 0x1E0
Type R/W, reset 0xFFFF.FFFF
16171819202122232425262728293031
DATANW
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
1111111111111111Reset
0123456789101112131415
DATA
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
1111111111111111Reset
DescriptionResetTypeNameBit/Field
Not Written
When set, this bit indicates that this 32-bit register has not been
committed. When clear, this bit specifies that this register has been
committed and may not be committed again.
1R/WNW31
User Data
Contains the user data value. This field is initialized to all 1s and can
only be committed once.
0x7FFFFFFFR/WDATA30:0
July 24, 2012330
Texas Instruments-Production Data
Internal Memory
OBSOLETE: TI has discontinued production of this device.
