RL78/G1H CHAPTER 24 SAFETY FUNCTIONS
R01UH0575EJ0120 Rev. 1.20 Page 787 of 920
Dec 22, 2016
24.3.6 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 24 - 11.
Figure 24 - 11 Invalid access detection area
Note The code flash memory, RAM, and lowest detection address of each product are as follows.
Products
Code Flash Memory
(00000H
to
xxxxxH)
RAM
(zzzzzH
to
FFEFFH)
Lowest Detection Address
(yyyyyH) when
Reading/Fetching
(Executing) Instructions
R5F11FLJ 262144 × 8 bits (00000H to 3FFFFH) 24576 × 8 bit (F9F00H to FFEFFH) 40000H
R5F11FLK
393216
× 8 bits (
00000H
to
5FFFFH) 32768
× 8 bit (
F7F00H
to
FFEFFH)
60000H
R5F11FLL
524688
× 8 bits (
00000H
to
7FFFFH) 49152
× 8 bit (
F3F00H
to
FFEFFH)
80000H
NG
Special function register (SFR)
256 bytes
RAM
Note
General-purpose register
32 bytes
Code flash memory
Note
Extended special function
register (2nd SFR)
2 Kbytes
Reserved
Reserved
Mirror
Data flash memory
Read
Write
Fetching
instructions
(execute)
Possibility access
OK
OK
OK
OK
OK
OK
OKOK
NGNG
NG
NG
NG
NG
00000H
yyyyyH
EEFFFH
EF000H
EFFFFH
F0000H
F07FFH
F0800H
F0FFFH
F1000H
zzzzzH
FFEDFH
FFEE0H
FFEFFH
FFF00H
FFFFFH
xxxxxH
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