参数资料
型号: M34551E8-XXXFP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, OTPROM, MICROCONTROLLER, PQFP48
封装: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件页数: 31/154页
文件大小: 1778K
代理商: M34551E8-XXXFP
APPLICATION
2-49
4551 Group User’s Manual
2.7 Reset
2.7.3 Voltage drop detection circuit
The built-in voltage drop detection circuit is designed to detect a drop in voltage and to reset the microcomputer
if the supply voltage drops below a set value.
Figure 2.7.5 shows the voltage drop detection reset circuit, and Figure 2.7.6 shows the operation waveform
example of the voltage drop detection circuit.
Fig. 2.7.5 Voltage drop detection reset circuit
Fig. 2.7.6 Voltage drop detection circuit operation waveform
VDD
Reset voltage
(Note)
Internal reset
signal
The microcomputer starts operation
after the f(XIN) is counted 10757 to
10786 times.
Note: Refer to section “3.1 Electrical characteristics” for the reset voltage
of the voltage drop detection circuit.
RESET pin
WEF
Watchdog timer output
Internal reset signal
Power-on
reset circuit
Pull-up transistor
Voltage drop detection circuit
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