参数资料
型号: MB90F457PMT
元件分类: 微控制器/微处理器
英文描述: 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP48
封装: 0.50 MM PITCH, PLASTIC, LQFP-48
文件页数: 55/78页
文件大小: 680K
代理商: MB90F457PMT
MB90455 Series
59
4.
AC Characteristics
(1) Clock timing
(VCC
= 5.0 V±10%, VSS = AVSS = 0.0 V, TA = 40 °C to +105 °C)
*1 : Internal operation clock frequency should not exceed 16 MHz.
*2 : When selecting the PLL clock, the range of clock frequency is limitted. Use this product within range as mentioned
in “Relation among external clock frequency and internal clock frequency”.
Parameter
Symbol
Pin name
Value
Unit
Remarks
Min
Typ
Max
Clock frequency
fC
X0, X1
3—
8
MHz
When crystal or ceramic
resonator is used*2
3
16
MHz External clock *1, *2
fCL
X0A, X1A
32.768
kHz
Clock cycle time
tHCYL
X0, X1
125
333
ns
tLCYL
X0A, X1A
30.5
s
Input clock pulse width
PWH, PWL
X0
10
ns
Set duty factor at 30% to
70% as a guideline.
PWLH,PWLL
X0A
15.2
s
Input clock rise time and fall
time
tCR, tCF
X0
5
ns
When external clock is
used
Internal operation clock
frequency
fCP
1.5
16
MHz When main clock is used
fLCP
8.192
kHz
When sub clock is used
Internal operation clock cycle
time
tCP
62.5
666
ns
When main clock is used
tLCP
122.1
s
When sub clock is used
X0
tHCYL
tCF
tCR
0.8 VCC
0.2 VCC
PWH
PWL
X0A
tLCYL
tCF
tCR
0.8 VCC
0.2 VCC
PWLH
PWLL
Clock timing
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