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參數(shù)資料
| 型號(hào)： | MB90V460 |
| 廠商： | Fujitsu Limited |
| 英文描述： | 16-bit Proprietary Microcontroller |
| 中文描述： | 16位微控制器專(zhuān)有 |
| 文件頁(yè)數(shù)： | 71/85頁(yè) |
| 文件大?。?/td> | 827K |
| 代理商： | MB90V460 |
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MB90460 Series
71
(3) Power-on Reset
(V
CC
=
5.0 V
±
10
%
, V
SS
=
AV
SS
=
0.0 V, T
A
=
40
°
C to
+
85
°
C)
Value
Note : V
CC
must be kept lower than 0.2 V before power-on.
The above values are used for causing a power-on reset.
Some registers in the device are initialized only upon a power-on reset. To initialize these registers, turn the
power supply using the above values.
Parameter
Symbol
Pin name
Condition
Unit
Remarks
Min
Max
Power supply rising time
t
R
V
CC
0.05
30
ms
Power supply cut-off time
t
OFF
V
CC
4
ms
Due to repeated
operations
V
CC
V
CC
3.0 V
V
SS
t
R
t
OFF
2.7 V
0.2 V
0.2 V
0.2 V
RAM data Hold
Sudden changes in the power supply voltage may cause a power-on reset.
To change the power supply voltage while the device is in operation, it is recommended to
raise the voltage smoothly to suppress fluctuations as shown below.
In this case, change the supply voltage with the PLL clock not used. If the voltage drop is 1 V
or fewer per second, however, you can use the PLL clock.
It is recommended to keep the
rising speed of the supply voltage
at 50 mV/ms or slower.
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