參數(shù)資料
型號: MB90W224AZF
元件分類: 微控制器/微處理器
英文描述: 16-BIT, UVPROM, 16 MHz, MICROCONTROLLER, CQFP120
封裝: CERAMIC, QFP-120
文件頁數(shù): 74/105頁
文件大?。?/td> 1700K
代理商: MB90W224AZF
MB90220 Series
70
(4) Power on Supply Specifications (Power-on Reset)
Single-chip mode
MB90223/224/P224B/W224B: (VCC = +4.5 V to +5.5 V, VSS = 0.0 V, TA = –40
°C to +105°C)
MB90P224A/W224A
: (VCC = +4.5 V to +5.5 V, VSS = 0.0 V, TA = –40
°C to +85°C)
External bus mode
: (VCC = +4.5 V to +5.5 V, VSS = 0.0 V, TA = –40
°C to +70°C)
* : Before power supply rising, it is required to be VCC < 0.2 V.
Notes: Power-on reset assumes the above values.
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.
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
tR
VCC
——
30
ms
*
Power supply cut-off time
tOFF
VCC
—1
ms
VCC
tR
4.5 V
0.2 V
tOFF
0.2 VCC
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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