參數(shù)資料
型號： F497
廠商： Fujitsu Limited
英文描述： 16-bit Proprietary Microcontroller CMOS
中文描述： 16位微控制器專有的CMOS
文件頁數(shù)： 27/40頁
文件大?。?/td> 484K
代理商： F497
MB90495 Series
MB90495 Series Data Sheet (Advance Information)
27 / 40
FME EMDC June 19, 2000
14.4 Power On Reset
(T
A
= –40 to +85
°
C, V
CC
= 5.0 V 10%, V
SS
= AV
SS
= 0.0 V)
Figure 14.5 Power On Reset Timing
Parameter
Symbol
Pin
Test Condition
Rated 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
t
R
3.5 V
0.2 V
V
CC
0.2 V
0.2 V
t
OFF
If you change the power supply voltage too rapidly, a power on reset may occur. We recommend that
you startup smoothly by restraining voltages when changing the power supply voltage during opera-
tion, as shown in the figure below. Perform while not using the PLL clock. However, if voltage drops
are within 1 mV/sec, you can operate while using the PLL clock.
V
CC
V
SS
3V
Holds RAM data
We recommend a rise of
50 mV/ms maximum.
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