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參數(shù)資料
| 型號： | MB90P224B |
| 廠商： | Fujitsu Limited |
| 英文描述： | 8-Bit Proprietary Microcontroller(8位專用微控制器) |
| 中文描述： | 8位微控制器專利（8位專用微控制器） |
| 文件頁數(shù)： | 70/105頁 |
| 文件大?。?/td> | 1130K |
| 代理商： | MB90P224B |
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MB90220 Series
70
(4) Power-on Reset
Single-chip mode
MB90223/224/P224B/W224B: (V
CC
= +4.5 V to +5.5 V, V
SS
= 0 V, Ta = –40
°
C to +105
°
C)
MB90P224A/W224A
: (V
CC
= +4.5 V to +5.5 V, V
SS
= 0 V, Ta = –40
°
C to +85
°
C)
: (V
CC
= +4.5 V to +5.5 V, V
SS
= 0 V, Ta = –40
°
C to +70
°
C)
External bus mode
* :Before power supply rising, it is required to be V
CC
< 0.2 V.
Notes: Power-on reset assumes the above values.
In the case of HST = “L”, whether the power-on reset is required or not, turn the power on according to
these characteristics and trigger the power-on reset.
There are internal registers (STBYC, etc.) which is initialized only by the power-on reset in the device.
When their initialization is expected, turn the power on according to these characteristics.
Note: Note on changing power supply
Even if above characteristics are not insufficient, abrupt changes in power supply voltage may cause a power-
on reset. Therefore, at the time of a momentary changes such as when power is turned on, rise the power
smoothly as shown below.
Parameter
Symbol
Pin name
Condition
Value
Unit
Remarks
Min.
Typ.
Max.
Power supply rising time
t
R
V
CC
—
—
—
30
ms
*
Power supply cut-off time
t
OFF
V
CC
—
1
—
—
ms
V
CC
t
R
4.5 V
0.2 V
t
OFF
Power-on Reset
Main power supply voltage
This rising edge should be
50 mV/ms or less
Subpower supply voltage
Vss
Changing Power Supply
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