M34282E2GP MITSUBISHI [Mitsubishi Electric Semiconductor], M34282E2GP Datasheet - Page 17

• Manufacturer Part Number: M34282E2GP
• Description: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

RESET FUNCTION
The 4282 Group has the power-on reset circuit, though it does
not have RESET pin. System reset is performed automatically
at power-on, and software starts program from address 0 in page
0.
Fig. 18 Reset release timing
Fig. 19 Power-on reset circuit example
Internal reset signal
f(X
IN
)
“H”
“L”
Internal reset signal
Voltage drop detection circuit
Watchdog timer output
Power-on reset circuit
f(X
MITSUBISHI
ELECTRIC
IN
) 16384 pulses
In order to make the built-in power-on reset circuit operate
efficiently, set the voltage rising time until V
obtained at power-on 1ms or less.
Power-on
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Reset state
V
Internal reset signal
Power-on reset circuit
output voltage
DD
Software operation starts
(address 0 in page 0)
Reset released
4282 Group
DD
= 0 to 2.2 V is
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