Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1682 of 1823
Jul 31, 2019
RX23W Group 50. Flash Memory (FLASH)
50.6 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 50.5 shows the Area Protection Overview (When Blocks 4 to 6 are Set as the Access Window in Products with
128-Kbyte ROM).
Figure 50.5 Area Protection Overview (When Blocks 4 to 6 are Set as the Access Window in Products with
128-Kbyte ROM)
Block 4
Block 3
Block 2
Block 1
Block 0
Block 6
Block 5Access window Enabled
Disabled
Disabled
Address for
reading
Rewrite by
self-programming
Rewrite in
boot mode
Enabled
Address for
programming/erasure
Access window
start address
Access window
end address
FFFE 0000h
FFFF FFFFh
FFFF C7FFh
FFFF C800h
FFFF DFFFh
FFFF E000h
FC1E 0000h
FC1F C7FFh
FC1F C800h
FC1F DFFFh
FC1F E000h
FC1F FFFFh
Block 63
Block 62

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English