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參數(shù)資料
| 型號(hào)： | 68HC908RF |
| 廠商： | Motorola, Inc. |
| 英文描述： | Microcontrollers |
| 中文描述： | 微控制器 |
| 文件頁(yè)數(shù)： | 5/16頁(yè) |
| 文件大?。?/td> | 604K |
| 代理商： | 68HC908RF |
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HC908LJ12AD/D
MC68HLC908LJ12
MOTOROLA
Addendum to MC68HC908LJ12 Technical Data
For More Information On This Product,
Go to: www.freescale.com
5
Oscillator
Characteristics
Table 4. Oscillator Specifications (2.4 to 2.7V)
Characteristic
Symbol
Min
Typ
Max
Unit
Internal oscillator clock frequency
f
ICLK
—
See
Figure 1
.
—
Hz
External reference clock to OSC1
(1)
f
OSC
dc
—
8M
Hz
Crystal reference frequency
(2)
f
XCLK
32.768k
4.9152M
Hz
Crystal load capacitance
(3)
C
L
—
—
—
Crystal fixed capacitance
C
1
—
2
×
C
L
(25p)
—
F
Crystal tuning capacitance
C
2
—
2
×
C
L
(25p)
—
F
Feedback bias resistor
R
B
—
10M
—
Series resistor
(4)
R
S
—
100k
—
1. No more than 10% duty cycle deviation from 50%.
2. Fundamental mode crystals only.
3. Consult crystal manufacturer’s data.
4. Not Required for high frequency crystals.
Table 5. Oscillator Specifications (2.7 to 3.3V)
Characteristic
Symbol
Min
Typ
Max
Unit
Internal oscillator clock frequency
f
ICLK
—
See
Figure 1
.
—
Hz
External reference clock to OSC1
(1)
f
OSC
dc
—
16M
Hz
Crystal reference frequency
(2)
f
XCLK
32.768k
4.9152M
Hz
Crystal load capacitance
(3)
C
L
—
—
—
Crystal fixed capacitance
C
1
—
2
×
C
L
(25p)
—
F
Crystal tuning capacitance
C
2
—
2
×
C
L
(25p)
—
F
Feedback bias resistor
R
B
—
10M
—
Series resistor
(4)
R
S
—
100k
—
1. No more than 10% duty cycle deviation from 50%.
2. Fundamental mode crystals only.
3. Consult crystal manufacturer’s data.
4. Not Required for high frequency crystals.
F
Freescale Semiconductor, Inc.
n
.
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