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RL78/G1A CHAPTER 22 SAFETY FUNCTIONS
22.3.6 Invalid memory access detection function
The IEC60730 standard mandates checking that the CPU and interrupts are operating correctly.
The illegal memory access detection function triggers a reset if a memory space specified as access-prohibited is
accessed.
The illegal memory access detection function applies to the areas indicated by NG in Figure 22-11.
Figure 22-11. Invalid Access Detection Area
<R>
Special function register (SFR)
256 bytes
RAM
Note
General-purpose register
32 bytes
Code flash memory
Note
Special function register (2nd SFR)
2 Kbytes
Reserved
Reserved
Mirror
Data flash memory
Read
Write
Instruction fetch
(execution)
Accessibility
OK
OK
OK
OK
OK
OK
OKOK
NGNG
NG
NG
NG
NG
NG
00000H
xxxxxH
FFFFFH
FFEFFH
FFF00H
FFEDFH
FFEE0H
zzzzzH
F1000H
F0FFFH
F0800H
F07FFH
F0000H
EFFFFH
EF000H
EEFFFH
yyyyyH
Note The following table lists the code flash memory, RAM, and lowest detection address for each product:
(The explanation is described on the next page.)
R01UH0305EJ0200 Rev.2.00 782
Jul 04, 2013