R01UH0823EJ0100 Rev.1.00
Page 138 of 1823
Jul 31, 2019
RX23W Group
6. Resets
6.2
Register Descriptions
6.2.1
Reset Status Register 0 (RSTSR0)
Note 1. The value after reset depends on the reset source.
Note 2. Only 0 can be written to clear the flag.
PORF Flag (Power-On Reset Detect Flag)
The PORF flag indicates that a power-on reset has occurred.
[Setting condition]
When a power-on reset occurs.
[Clearing conditions]
When resets shown in
occur.
When PORF is read as 1 and then 0 is written to PORF.
LVD0RF Flag (Voltage Monitoring 0 Reset Detect Flag)
The LVD0RF flag indicates that VCC voltage has fallen below Vdet0.
[Setting condition]
When Vdet0-level VCC voltage is detected.
[Clearing conditions]
When resets listed in
occur.
When LVD0RF is read as 1 and then 0 is written to LVD0RF.
LVD1RF Flag (Voltage Monitoring 1 Reset Detect Flag)
The LVD1RF flag indicates that VCC voltage has fallen below Vdet1.
[Setting condition]
When Vdet1-level VCC voltage is detected.
[Clearing conditions]
When a reset listed in
occurs.
When LVD1RF is read as 1 and then 0 is written to LVD1RF.
Address(es): 0008 C290h
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
LVD1R
F
LVD0R
F
PORF
Value after reset:
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b0
Power-On Reset Detect Flag
0: Power-on reset not detected.
1: Power-on reset detected.
R(/W)
b1
Voltage Monitoring 0 Reset Detect
Flag
0: Voltage monitoring 0 reset not detected.
1: Voltage monitoring 0 reset detected.
R(/W)
b2
Voltage Monitoring 1 Reset Detect
Flag
0: Voltage monitoring 1 reset not detected.
1: Voltage monitoring 1 reset detected.
R(/W)
b7 to b3
—
Reserved
These bits are read as 0. The write value should be 0.
R/W