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參數(shù)資料
| 型號： | MB90F378PFF-GE1 |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-bit Proprietary Microcontroller |
| 中文描述： | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP144 |
| 封裝： | 0.40 MM PITCH, PLASTIC, LQFP-144 |
| 文件頁數(shù)： | 47/65頁 |
| 文件大小： | 323K |
| 代理商： | MB90F378PFF-GE1 |
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MB90378 Series
47
(3) Power-on Reset
(V
CC
=
2.7 V to 3.6 V, AV
CC
=
2.7 V to 3.6 V, V
SS
=
AV
SS
=
0.0 V, T
A
=
40
°
C to
+
85
°
C)
Value
* : V
CC
must be kept lower than 0.2 V before power-on.
Notes :
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
on the power supply using the above values.
Make sure that power supply rises within the selected oscillation stabilization time. If the power supply
voltage needs to be varied in the course of operation, a smooth voltage rise is recommended.
Parameter
Symbol Pin name Condition
Unit
Remarks
Min
Max
Power supply rise time
t
R
V
CC
*
50
ms
Power supply cut-off time
t
OFF
V
CC
*
1
ms
Due to repeated
operations
t
OFF
t
R
2.2 V
0.2 V
0.2 V
0.2 V
V
CC
RAM data hold
V
CC
1.8 V
V
SS
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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