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3.2.1.3. Continuation of reset by LVD
When the power supply voltage has not exceeded the LVD release voltage even after "Internal initialization time"
elapses, LVD generates the reset signal and the reset state continues. After the power supply voltage exceeds the
LVD release voltage and "LVD detection release time" + "CPU operation wait time" elapses, the internal reset is
deasserted. And CPU starts operating. Refer to reference manual "Voltage detection circuit" for detail of LVD.
Operation Voltage range
LVD Release voltage
(V
)
LVL0
PORF Release voltage
(V
)
PORFL
POR Release voltage
(V
)
PREL
0V
RESET_N pin
LVD reset
Internal reset
Power on rising
gradient
(V
Internal initialization time (
Figure 3.4 Reset operation by LVD reset
63 / 71
Clock Control and Operation Mode
DVDD5 = DVDD5A = DVDD5B = AVDD5
)
PON
PORF detection
release time
t
(
)
VPORF2
t
)
IINIT
LVD detection
release time
t
(
)
VDDT2
TXZ+ Family
TMPM3H Group(2)
DVDD5
CPU Operation
start
CPU waiting time
t
(
)
CPUWT
2023-04-28
Rev. 1.0
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