參數(shù)資料
型號(hào)： MB89123APFM
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 4.2 MHz, MICROCONTROLLER, PQFP48
封裝： PLASTIC, QFP-48
文件頁(yè)數(shù)： 22/42頁(yè)
文件大?。?/td> 388K
代理商： MB89123APFM
MB89120/120A Series
29
4.
AC Characteristics
(1) Reset Timing
(VCC
= +5.0 V ±10%, AVSS = VSS = 0.0 V, TA = 40 °C to +85 °C)
* : tHCYL is the oscillation cycle (1/FCH) input to the X0.
(2) Power-on Reset
(AVSS
= VSS = 0.0 V, TA = 40 °C to +85 °C)
Note : Make sure that power supply rises within the oscillation stabilization time selected.
For example, when the main clock is operating at FCH
= 3 MHz and the oscillation stabilization time select
option has been set to 212/FCH, the oscillation settling time is 1.4 ms and accordingly the maximum value of
power supply rising time is about 1.4 ms.
Keep in mind that rapid changes in power supply voltage may cause a power-on reset. If power supply
voltage needs to be varied in the course of operation, a smooth voltage rise is recommended.
Parameter
Symbol
Condition
Value
Unit
Remarks
Min.
Max.
RST “L” pulse width
tZLZH
48 tHCYL*
ns
Parameter
Symbol
Condition
Value
Unit
Remarks
Min.
Max.
Power supply rising time
tR
50
ms
Power-on reset
function only
Power supply cut-off time
tOFF
1
ms
Due to repeated
operations
tZLZH
0.2 VCC
0.8 VCC
RST
0.2 V
2.0 V
VCC
0.2 V
tR
tOFF
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