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參數(shù)資料
| 型號： | M34514E8 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片4位微機的CMOS |
| 文件頁數(shù)： | 48/106頁 |
| 文件大?。?/td> | 1304K |
| 代理商： | M34514E8 |
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48
4513/4514 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
(1) Power-on reset
Reset can be performed automatically at power on (power-on re-
set) by connecting resistors, a diode, and a capacitor to RESET
pin. Connect RESET pin and the external circuit at the shortest dis-
tance.
Fig. 34 Power-on reset circuit example
(2) Internal state at reset
Table 19 shows port state at reset, and Figure 35 shows internal
state at reset (they are the same after system is released from re-
set). The contents of timers, registers, flags and RAM except
shown in Figure 35 are undefined, so set the initial value to them.
Table 19 Port state at reset
Name
D
0
–D
5
D
6
/CNTR0, D
7
/CNTR1
P0
0
–P0
3
P1
0
–P1
3
P2
0
/S
CK
, P2
1
/S
OUT
, P2
2
/S
IN
P3
0
/INT0, P3
1
/INT1
P3
2
, P3
3
(Note 4)
P4
0
/A
IN4
–P4
3
/A
IN7
(Note 4)
P5
0
–P5
3
(Note 4)
Notes 1: Output latch is set to “1.”
2: Pull-up transistor is turned OFF.
3: After system is released from reset, port P5 is in the input mode. (Direction register FR0 = 0000
2
)
4: The 4513 Group does not have these ports.
Function
D
0
–D
5
D
6
, D
7
P0
0
–P0
3
P1
0
–P1
3
P2
0
–P2
2
P3
0
, P3
1
P3
2
, P3
3
P4
0–
P4
3
P5
0
–P5
3
State
High impedance (Note)
High impedance (Notes 1, 2)
High impedance
High impedance (Note 1)
High impedance (Note 1)
High impedance (Note 3)
V
DD
RESET pin
WEF
(
Note
)
Internal reset signal
Voltage drop detection circuit
Watchdog timer output
V
DD
RESET pin voltage
Power-on
Reset released
Internal reset signal
Reset state
Note:
This symbol represents a parasitic diode.
Applied potential to RESET pin must be V
DD
or less.
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| M34514E8FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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