tmp89fm42a TOSHIBA Semiconductor CORPORATION, tmp89fm42a Datasheet - Page 71

• Manufacturer Part Number: tmp89fm42a
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

2.4
Reset Control Circuit
RA000
2.4.4.3
2.4.4.4
2.4.4.5
2.4.4.6
has reached a predetermined detection voltage.
detected.
register is set to a combination that puts the CPU into deadlock.
circuit is broken down during operation due to noise or other factors.
voltage for the power-on reset and the voltage detection circuits.
release (tPWUP) and latched into the internal circuit.
follows reset release is abnormal, IRSTSR<TRMDS> is set to "1".
Figure 2-18 External Reset Input (When the Power Supply Is Stable)
CPU and peripheral
Operating voltage
The voltage detection reset is an internal factor reset that occurs when it is detected that the supply voltage
Refer to "Voltage Detection Circuit".
The watchdog timer reset is an internal factor reset that occurs when an overflow of the watchdog timer is
Refer to "Watchdog Timer".
The system clock reset is an internal factor reset that occurs when it is detected that the oscillation enable
Refer to "Clock Control Circuit".
The trimming data reset is an internal factor reset that occurs when the trimming data latched in the internal
The trimming data is a data bit provided for adjustment of the ladder resistor that generates the comparison
This bit is loaded from the non-volatile exclusive use memory during the warm-up time that follows reset
If the trimming data loaded from the non-volatile exclusive use memory during the warm-up operation that
Voltage detection reset
Watchdog timer reset
System clock reset
Trimming data reset
circuits reset
・ When the supply voltage is within the operating voltage range
RESET pin
range
holding the RESET pin Low for 5 [μs] or longer generates a reset. Then, changing the RESET pin
level to High starts a warm-up period. Upon completion of the warm-up period, the CPU and
peripheral circuits start operating (Figure 2-18).
When the supply voltage is within the operating voltage range and stable oscillation is achieved,
5µs or more
Warm-up period
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(t
PWUP
)
CPU and peripheral circuits start operating
TMP89FM42A