參數(shù)資料
型號: MB90F57APMT
廠商: FUJITSU LTD
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, MICROCONTROLLER, PQFP120
封裝: PLASTIC, LQFP-120
文件頁數(shù): 117/133頁
文件大?。?/td> 2509K
代理商: MB90F57APMT
MB90570 Series
84
(2) Specification for Power-on Reset
(AVSS = VSS = 0.0 V, TA = –40
°C to +85°C)
* : VCC must be kept lower than 0.2 V before power-on.
Notes: The above ratings are values for causing a power-on reset.
There are internal registers which can be initialized only by a power-on reset.
Apply power according to this rating to ensure initialization of the registers.
Parameter
Symbol
Pin name Condition
Value
Unit
Remarks
Min.
Max.
Power supply rising time
tR
VCC
0.05
30
ms
*
Power supply cut-off time
tOFF
VCC
4—
ms
Due to repeated
operations
VCC
tOFF
0.2 V
2.7 V
0.2 V
tR
VSS
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 mV or fewer per
second, however, you can use the PLL clock.
VCC
3.0 V
It is recommended to keep the rising
speed of the supply voltage at 50 mV/ms
or slower.
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