參數(shù)資料
型號: MB90F497PFM
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP64
封裝: 12 X 12 MM, 0.65 MM PITCH, QFP-64
文件頁數(shù): 20/40頁
文件大?。?/td> 484K
代理商: MB90F497PFM
MB90495 Series
MB90495 Series Data Sheet (Advance Information)
27 / 40
FME EMDC June 19, 2000
14.4 Power On Reset
(TA = –40 to +85
°C, VCC = 5.0 V 10%, VSS = AVSS = 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
tR
VCC
0.05
30
ms
Power off time
tOFF
VCC
50
ms
Due to repetitive operation
tR
3.5 V
0.2 V
VCC
0.2 V
tOFF
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.
VCC
VSS
3V
Holds RAM data
We recommend a rise of
50 mV/ms maximum.
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