m38039mf-xxxsp Mitsumi Electronics, Corp., m38039mf-xxxsp Datasheet - Page 84

• Manufacturer Part Number: m38039mf-xxxsp
• Description: Single-chip 8-bit Cmos Microcomputer
• Manufacturer: Mitsumi Electronics, Corp.

RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an "L"
level for 16 cycles or more of X
to an "H" level (the power source voltage should be between 2.7 V
and 5.5 V, and the oscillation should be stable), reset is released.
After the reset is completed, the program starts from the address
contained in address FFFD
FFFC
less than 0.54 V for V
Fig. 79 Reset sequence
84
16
RESET
Internal
reset
Address
Data
SYNC
X
(low-order byte). Make sure that the reset input voltage is
IN
CC
X
of 2.7 V.
IN
: 10.5 to 18.5 clock cycles
16
IN
. Then the RESET pin is returned
(high-order byte) and address
?
?
?
Notes
? ?
1: The frequency relation of f(X
2: The question marks (?) indicate an undefined state that depends on the previous state.
? ?
?
?
?
Fig. 78 Reset circuit example
FFFC
RESET
IN
) and f( ) is f(X
RESET
AD
L
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
FFFD
AD
IN
)=8
V
H
V
AD
CC
MITSUBISHI MICROCOMPUTERS
•
CC
f( ).
H
,
Power source
voltage
Reset input
voltage
L
0V
0V
Note : Reset release voltage ; Vcc=2.7 V
Reset address from the vector table.
3803/3804 Group
Power source
voltage detection
circuit
Poweron
(Note)
0.2V
CC