CHAPTER 13 RESET FUNCTION
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User’s Manual U15195EJ5V0UD
(1) Reset signal acknowledgment
RESET
Internal system
reset signal
Elimination as noise
Reset acknowledgment
Reset release
Analog
delay
Analog
delay
Analog
delay
Note
Note
The internal system reset signal remains active for a period of at least 4 system clocks after the timing of
a reset release by the RESET pin.
(2) Reset at power-on
<1> Reset circuit
RESET
5 V
5 V
5 V
5 V reset
generator
Regulator control (REGRES5)
Pin high-impedance control (RES5)
Internal circuit control (RES3)
3.3 V reset
generator
3.3 V
3.3 V
Note
Note
Apply 5 V initially. If 5 V is not applied initially, this level cannot be determined, and a reset will not occur.
Caution Apply power in the following sequence.
<1> 5 V power supply
<2> 3.3 V power supply