参数资料
型号: MB89945PF
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP48
封装: PLASTIC, QFP-48
文件页数: 22/38页
文件大小: 380K
代理商: MB89945PF
MB89940 Series
29
(3) Clock Timing
(AVSS = VSS = DVSS, TA = –40
°C to +85°C)
(4) Instruction Cycle
Note : When operating at 8 MHz, the cycle varies with the set execution time.
Parameter
Symbol
Condition
Value
Unit
Remarks
Min
Max
Clock frequency
FC
18
MHz
Clock cycle time
tCYC
125
1000
ns
Input clock pulse width
tWH
tWL
20
ns
Input clock rising/falling time
tCR
tCF
—10
ns
Parameter
Symbol
Value (typical)
Unit
Remarks
Instruction cycle
(minimum execution time)
tinst
4/FC, 8/FC, 16/FC, 64/FC
s (4/FC) tinst = 0.5 s when operating at
FC = 8 MHz
0.2 VCC
X0
0.2 VCC
X0
X1
tCYC
When a crystal
or
ceramic resonator is used
X0
X1
When an external clock is used
Open
0.2 VCC
0.8 VCC
tCR
tCF
tWL
X0 and X1 Timing and Conditions
Clock Conditions
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