R01UH0822EJ0100 Rev.1.00
Page 107 of 1041
Jul 31, 2019
RX13T Group
7. Option-Setting Memory (OFSM)
7.2
Register Descriptions
7.2.1
Option Function Select Register 0 (OFS0)
Note 1. The value of the blank product is FFFF FFFFh. This register is set to a specified value after programming of the flash memory
with the user program.
The OFS0 register is allocated in the ROM. Set this register at the same time as writing the program. After writing to the
OFS0 register once, do not write to it again.
Address(es): OFSM.OFS0 FFFF FF8Ch
b31
b30
b29
b28
b27
b26
b25
b24
b23
b22
b21
b20
b19
b18
b17
b16
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Value after reset:
The value set by the user*
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
IWDTS
LCSTP
—
IWDTR
STIRQS
IWDTRPSS[1:0] IWDTRPES[1:0]
IWDTCKS[3:0]
IWDTTOPS[1:0] IWDTS
TRT
—
Value after reset:
The value set by the user*
Bit
Symbol
Bit Name
Description
R/W
b0
—
Reserved
When reading, this bit returns the value written by the user.
The write value should be 1.
R
b1
IWDT Start Mode Select
0: IWDT is automatically activated in auto-start mode after a
reset
1: IWDT is halted after a reset
R
b3, b2
IWDT Timeout Period Select
b3 b2
0 0: 128 cycles (007Fh)
0 1: 512 cycles (01FFh)
1 0: 1024 cycles (03FFh)
1 1: 2048 cycles (07FFh)
R
b7 to b4
IWDT Clock Frequency
Division Ratio Select
b7 b4
0 0 0 0: No division
0 0 1 0: Divide-by-16
0 0 1 1: Divide-by-32
0 1 0 0: Divide-by-64
1 1 1 1: Divide-by-128
0 1 0 1: Divide-by-256
Settings other than above are prohibited.
R
b9, b8
IWDT Window End Position
Select
b9 b8
0 0: 75%
0 1: 50%
1 0: 25%
1 1: 0% (No window end position setting)
R
b11, b10
IWDT Window Start Position
Select
b11 b10
0 0: 25%
0 1: 50%
1 0: 75%
1 1: 100% (No window start position setting)
R
b12
IWDT Reset Interrupt
Request Select
0: Non-maskable interrupt request is enabled
1: Reset is enabled
R
b13
—
Reserved
When reading, this bit returns the value written by the user.
The write value should be 1.
R
b14
IWDT Sleep Mode Count
Stop Control
0: Counting stop is disabled
1: Counting stop is enabled when entering sleep, software
standby, or deep sleep mode
R
b31 to b15
—
Reserved
When reading, these bits return the value written by the
user. The write value should be 1.
R