Area Protection - Renesas RX100 Series User Manual

RX13T Group
31.6

Area Protection

Area protection enables rewriting only the selected blocks (access window) in the user area and disables rewriting the
other blocks during self-programming. The access window cannot be set in the data area.
Specify the start address and end address to set the access window. While the access window can be set in boot mode or
by self-programming, area protection is enabled only during self-programming in single-chip mode.
Figure 31.4 shows the Area Protection Overview (When Blocks 4 to 6 are Set as the Access Window in Products with
128-Kbyte ROM).
Address for
reading
FFFE 0000h
FFFF E3FFh
FFFF E400h
Access window
FFFF EFFFh
FFFF F000h
FFFF FFFFh
Figure 31.4 Area Protection Overview (When Blocks 4 to 6 are Set as the Access Window in Products with
128-Kbyte ROM)
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
Address for
programming/erasure
6 0000h
Block 127
Block 126
7 E3FFh
7 E400h
Block 6
Block 5
Block 4
7 EFFFh
7 F000h
Block 3
Block 2
Block 1
Block 0
7 FFFFh
31. Flash Memory (FLASH)
Rewrite by
self-programming
Disabled
Access window
Enabled
start address
Access window
end address
Disabled
Rewrite in
boot mode
Enabled
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