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參數(shù)資料
| 型號： | MB90P553APF |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | PLASTIC, QFP-100 |
| 文件頁數(shù)： | 33/61頁 |
| 文件大?。?/td> | 687K |
| 代理商： | MB90P553APF |
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MB90550A/550B Series
39
(4) Specification for Power-on Reset
(VCC
= 5.0 V ± 10 %, VSS = AVSS = 0.0 V, TA = 40 °C to +85 °C)
Note:
VCC must be kept lower than 0.2 V before power-on.
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
Value
Unit
Remarks
Min
Max
Power supply rising time
tR
VCC
0.05
30
ms
Power-supply start voltage
VOFF
—0.2
V
Power-supply end voltage
VON
2.7
—
V
Power supply cut-off time
tOFF
4
—
ms
Due to repeated operations
VCC
5.0 V
VCC
3.0 V
0 V
VSS
tR
0.2 V
2.7 V
tOFF
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 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.
RAM data being held
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