參數(shù)資料
型號: M37641M8-XXXHP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁數(shù): 68/149頁
文件大小: 1997K
代理商: M37641M8-XXXHP
68
7641 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
RESET CIRCUIT
To reset the microcomputer, RESET pin should be held at an “L”
level for 20 cycles or more of
φ
. Then the RESET pin is returned to
an “H” level, and reset is released. They must be performed when
the power source voltages are between 3.00 V and 3.60 V or 4.15
V and 5.25 V.
After the reset is completed, the program starts from the address
contained in address FFFA
16
(high-order byte) and address
FFFB
16
(low-order byte).
After oscillation has restarted, the timers 1 and 2 secures waiting
time for the internal clock
φ
oscillation stabilized automatically by
setting the timer 1 to “FF
16
” and timer 2 to “01
16
”. The internal
clock
φ
retains “H” level until Timer 2’s underflow and it cannot be
supplied until the underflow.
The pins state during reset are follows:
When CNVss = “H”
Ports P0, P1, P3
3
to P3
7
Pins other than above mentioned ports
When CNVss = “L”
All pins
: Outputting
: Inputting
: Inputting.
Fig. 62 Reset sequence
Fig. 61 Reset circuit example
(Note)
0.2V
CC
0V
0V
Poweron
V
CC
RESET
V
CC
RESET
Power source
voltage detection
circuit
Power source
voltage
Reset input
voltage
Note
:
Reset release voltage ; Vcc = 3.00 or 4.15 V
RESET
Internal
reset
Data
φ
Address
SYNC
X
IN
: 512 clock cycles
FFFA
FFFB
AD
H
,
L
AD
L
AD
H
Reset address from
the vector table.
Notes:
The question marks () indicate an undefined state that depends on the previous state.
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