R01UH0823EJ0100 Rev.1.00
Page 143 of 1823
Jul 31, 2019
RX23W Group
6. Resets
Figure 6.1
Operation Examples During a Power-On Reset and Voltage Monitoring 0 Reset
VCC
RES#
4.7 k
(reference value)
RES# pin
*2
POR detection signal
(Low is valid)
Internal reset signal
RSTSR0.PORF
Voltage detection 0
signal (Low is valid)
RSTSR0.LVD0RF
LVD0 enable/disable
signal (Low is valid)
VPOR
*1
Vdet0
*4
External voltage
VCC
Reset by a pin reset
tPOR
*3
tLVD
*3
Set by OFS1.LVDAS
Power-on reset state
Voltage monitoring 0 reset state
Note:
For details on the electrical characteristics, see the Electrical Characteristics section.
Note 1. Vdet0 indicates the detection level for a voltage monitoring 0 reset and VPOR indicates the detection level for a
power-on reset.
Note 2. Ensure that the voltage on the RES# pin is always at least VIH.
Note 3. tPOR indicates the period of a power-on reset and tLVD0 indicates the period of a voltage monitoring 0 reset.
Note 4. At the time the power-supply voltage rises, VCC must rise to at least the minimum guaranteed voltage before release
from the POR reset state.