Register 16: Flash Memory Protection Program Enable 1 (FMPPE1), offset
0x404
Note: Offset is relative to System Control base address of 0x400FE000.
This register stores the execute-only protection bits for each 2-KB flash block (FMPREn stores the
execute-only bits). Flash memory up to a total of 64 KB is controlled by this register. Other FMPPEn
registers (if any) provide protection for other 64K blocks. This register is loaded during the power-on
reset sequence. The factory settings for the FMPREn and FMPPEn registers are a value of 1 for
all implemented banks. This achieves 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. The reset value shown only applies to power-on reset; any other type of reset does
not affect this register. If the Flash memory size on the device is less than 64 KB, this register usually
reads as zeroes, but software should not rely on these bits to be zero. For additional information,
see the "Flash Memory Protection" section.
Flash Memory Protection Program Enable 1 (FMPPE1)
Base 0x400F.E000
Offset 0x404
Type R/W, reset 0x0000.FFFF
16171819202122232425262728293031
PROG_ENABLE
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
0000000000000000Reset
0123456789101112131415
PROG_ENABLE
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
1111111111111111Reset
DescriptionResetTypeNameBit/Field
Flash Programming Enable
DescriptionValue
Bits [31:0] each enable protection on a 2-KB block of
Flash memory in memory range from 65 to 128 KB.
0x0000FFFF
0x0000FFFFR/WPROG_ENABLE31:0
June 22, 2010146
Texas Instruments-Production Data
Internal Memory
