Technical information
56
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an "L"
level for 2 µs or more. Then the RESET pin is returned to an "H"
level (the power source voltage should be between 2.7 V and 5.5
V (4.0 V to 5.5 V for flash memory version), and the oscillation
should be stable), reset is released. After the reset is completed,
the program starts from the address contained in address FFFD16
(high-order byte) and address FFFC16 (low-order byte). Make sure
that the reset input voltage is less than 0.54 V for VCC of 2.7 V. For
flash memory version, make sure that the reset input voltage is
less than 0.8 V for Vcc of 4.0 V.
Fig. 56 Reset sequence
Fig. 55 Reset circuit example
(Note)
0.2V
CC
0V
0V
Poweron
VCCRESET
VCC
RESET
Power source
voltage detection
circuit
Power source
voltage
Reset input
voltage
Note : Reset release voltage ; Vcc=2.7 V
(Vcc = 4.0 V for flash memory version)
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