參數(shù)資料
型號: MB90580C
廠商: Fujitsu Limited
英文描述: 16-bit Proprietary Microcontroller
中文描述: 16位微控制器專有
文件頁數(shù): 87/110頁
文件大?。?/td> 540K
代理商: MB90580C
MB90580C Series
87
(4) Power-on Reset
(V
CC
=
5.0 V
±
10
%
, V
SS
=
AV
SS
=
0.0 V, T
A
=
40
°
C to
+
85
°
C)
Value
* : VCC must be kept lower than 0.2 V before power-on.
Note: The above values are used for causing a power-on reset.
If HST = “L”, be sure to turn the power supply on using the above values to cause a power-on reset whether
or not the power-on reset is required.
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
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 recom-
mended 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 volt-
age 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.
RAM data hold
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