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參數(shù)資料
| 型號(hào)： | M34250E2FP |
| 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 |
| 文件頁數(shù)： | 25/58頁 |
| 文件大?。?/td> | 331K |
| 代理商： | M34250E2FP |
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MITSUBISHI
ELECTRIC
25
MITSUBISHI MICROCOMPUTERS
4250 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Fig. 22 Power-on reset circuit example
(2) Internal state at reset
Table 11 shows port state at reset, and Figure 23 shows
internal state at reset (they are retained after system is released
from reset).
Table 11 Port state at reset
Name
D
0
, D
1
, D
2
/C, D
3
/K
S
0
–S
3
G
0
/INT, G
1
/T
OUT
G
2
, G
3
F
0
, F
1
Note: Output latch is set to “1.”
The contents of timers, registers, flags and RAM except shown
in Figure 23 are undefined, so set the initial value to them.
State
High impedance
(Note)
Function
D
0
, D
1
, D
2
/C, D
3
/K
S
0
–S
3
G
0
/INT, G
1
G
2
, G
3
F
0
, F
1
(1) Power-on reset
Reset can be automatically performed at power on (power-on
reset) by connecting a resistor, a diode, and a capacitor to
RESET
pin. Connect
RESET
pin and the external circuit at the
shortest distance.
V
DD
V
DD
RESET pin voltage
Internal reset signal
Power-on
RESET
pin
This symbol represents a parasitic diode.
Note: Applied potential to RESET pin
must be 7 V or less.
Internal reset
signal
Reset state
Reset released
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