參數資料
型號： MB90F439
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： 38/58頁
文件大小： 629K
代理商： MB90F439
MB90435 Series
38
(4) Power On Reset
(MB90F438L (S) /437L (S) /438L (S) : V
CC
=
3.5 V to 5.5 V, V
SS
=
AV
SS
=
0.0 V, T
A
=
40
°
C to
+
105
°
C)
(MB90F439 (S) /439 (S) /V540G : V
CC
=
5.0 V
±
10
%
, V
SS
=
AV
SS
=
0.0 V, T
A
=
40
°
C to
+
105
°
C)
* : V
CC
must be kept lower than 0.2 V before power-on.
Notes :
The above values are used for creating a power-on reset.
Some registers in the device are initialized only upon a power-on reset. To initialize these register, turn on
the power supply using the above values.
Parameter
Symbol
Pin
name
Condition
Value
Units
Remarks
Min
Max
Power on rise time
t
R
V
CC
0.05
30
ms
*
Power off time
t
OFF
V
CC
50
ms
Due to repetitive operation
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 being held
It is recommended to keep the
rising speed of the supply voltage
at 50 mV/ms or slower.
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.
相關PDF資料
PDF描述
MB90F439PF 16-bit Proprietary Microcontroller
MB90F439PFV 16-bit Proprietary Microcontroller
MB90F439SPF 16-bit Proprietary Microcontroller
MB90F439SPFV 16-bit Proprietary Microcontroller
MB90437LSPF 16-bit Proprietary Microcontroller
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