Reset And Power Supply Control; Outlines; Description Of Function And Operation; Cold Reset - Toshiba TXZ+ TMPM4MNFYAFG Reference Manual

3. Reset and power supply control

3.1. Outlines

Function classification

Cold reset

(Reset by turning on a power supply)
Warm reset
(Reset without turning on a power
supply)
Single boot starting

3.2. Description of function and operation

This chapter describes the power-on, power-off, and reset related items.
Note: Refer to "Electrical Characteristics" of a datasheet for the time and voltage of description of the
symbol in a figure.
3.2.1. Cold reset
When turn on a power supply, the stabilization time for the built-in regulator, the built-in flash memory, and the
built-in high speed oscillator is necessary. The TXZ+ family automatically insert a wait time for the stabilization
of these circuits.
When turning on the power, make sure that the slope of the power supply voltage rises to the right. If the power
supply voltage drops and rises near POR and PORF detection voltage, it may not operate normally even if the
power supply voltage rises to the guaranteed operating range thereafter.
Factor
Reset which occurs at the time of a power supply turning
Power On Reset
on or turning off.
LVD reset Reset which occurs below the set-up voltage
Reset pin Reset by a RESET_N pin
Reset that occurs when power is turned on or off and
PORF reset
flash memory and debug circuits are reset with priority.
Reset by SIWDT, OFD, LVD, LOCKUP, and
Internal reset
<SYSRESETREQ>
Reset pin Reset by a RESET_N pin
After reset is released, it starts from the internal boot
Reset pin
ROM.
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TMPM4M Group(1)
Clock Control and Operation Mode
Functional Description
TXZ+ Family
2022-06-24
Rev. 1.1