參數(shù)資料
型號(hào)： M34570M4
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述： 單芯片4位微機(jī)的CMOS
文件頁(yè)數(shù)： 30/68頁(yè)
文件大小： 319K
代理商： M34570M4
30
MITSUBISHI MICROCOMPUTERS
4570 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
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.
Fig. 27 Voltage drop detection reset circuit
Fig. 28 Voltage drop detection circuit operation waveform
RESET pin
WEF
Watchdog timer output
Internal reset signal
Power-on
reset circuit
Pull-up transistor
Voltage drop detection circuit
V
DD
Reset voltage
Internal reset
signal
The microcomputer starts operation
after the f(X
IN
) is counted 10757 to
10786 times.
Note: Set the VDCE pin to “H” level to operate the
voltage drop detection circuit.
The voltage drop detection circuit is not operated at the RAM
back-up mode.
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