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| 型號： | MC68HC05SU3AB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP42 |
| 封裝： | SDIP-42 |
| 文件頁數(shù)： | 15/80頁 |
| 文件大小： | 710K |
| 代理商： | MC68HC05SU3AB |
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MOTOROLA
2-4
MC68HC05SU3A
PIN DESCRIPTIONS
2
2.2.3
RC Oscillator Option
This conguration is intended to be the lowest cost option in applications where oscillator accuracy
is not important. An internal constant current source and a capacitor have been integrated on-chip,
connected between the OSC2 pin and VSS. Thus by either connecting a resistor to VDD from
OSC2 or by putting a wire strap between OSC1 and OSC2 self-oscillations at the frequency as
shown in Figure 2-2 and Figure 2-3 can be induced.
Figure 2-2 Typical Oscillator Frequency for Selected External Resistor
Figure 2-3 Typical Oscillator Frequency for Wire-Strap Connection
110
50
70
90
130
170
190
210
150
3.5
3.0
2.5
2.0
1.5
1.0
Resistance (K
)
Oscillator
F
requency
(MHz)
230
3.5
2.0
2.5
3.0
4.0
5.0
5.5
6.0
4.5
2.25
2.00
1.75
1.50
1.25
1.00
VDD (V)
Oscillator
F
requency
(MHz)
T=0
°C
T=25
°C
T=50
°C
TPG
20
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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