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SH79F3283
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8.10 Low Voltage Reset (LVR)
8.10.1 Feature
Enabled by the code option and V
LVR
is 4.1V, 3.7V, 2.8V or 2.1V
LVR de-bounce timer T
LVR
is 30-60
µ
s
When the power supply voltage is lower than the set voltage V
LVR
, it will cause the internal reset
The LVR function is used to monitor the supply voltage and generate an internal reset in the device when the supply voltage
below the specified value V
LVR
. The LVR de-bounce timer T
LVR
is about 30
µ
s-60
µ
s.
The LVR circuit has the following feature when the LVR function is enabled: (t means the time of the supply voltage below
V
LVR
)
Generates a system reset when V
DD
≤
V
LVR
and t
≥
T
LVR
;
Cancels the system reset when V
DD
> V
LVR
or V
DD
<
V
LVR
, but t
<
T
LVR
.
The LVR function is enabled by the code option.
It is typically used in AC line or large capacity battery applications, where heavy loads may be switched on and cause the
MCU supply-voltage temporarily falls below the minimum specified operating voltage.
Low voltage reset can be applied to this, protecting system generates valid reset in the below set voltages.