29.4 Functional Description
The information found here describes functional details of the flash memory module.
29.4.1 Flash Protection
Individual regions within the flash memory can be protected from program and erase
operations.
Protection is controlled by the following registers:
•
FPROTn —
• For 2
n
program flash sizes, four registers typically protect 32 regions of the
program flash memory as shown in the following figure
Program flash size / 32
Program flash size / 32
Program flash size / 32
Program flash size / 32
Program flash size / 32
Program flash size / 32
Program flash size / 32
FPROT3[PROT0]
0x0_0000
FPROT3[PROT1]
FPROT3[PROT2]
FPROT3[PROT3]
FPROT0[PROT29]
FPROT0[PROT31]
FPROT0[PROT30]
Program flash
Last program flash address
Figure 29-2. Program flash protection
NOTE
Flash protection features are discussed further in AN4507:
Using the Kinetis Security and Flash Protection Features . Not
all features described in the application note are available on
this device.
Functional Description
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
648 NXP Semiconductors
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