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參數(shù)資料
| 型號(hào)： | MSM9805-xxx |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Voice Synthesis IC with Built-in Mask ROM |
| 中文描述： | 語(yǔ)音合成集成電路內(nèi)置掩模ROM |
| 文件頁(yè)數(shù)： | 40/52頁(yè) |
| 文件大?。?/td> | 349K |
| 代理商： | MSM9805-XXX |
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MSM9802/03/05-xxx
Semiconductor
5.1 Determining RC constants
The RC oscillation frequency characteristics are shown in Figure 5.2. If f
osc
is set to 256 kHz, use
the following values as a guide (see Figure 5.2) to set the C and R2 that fit the printed-circuit board
type used.
R1=100 k
W
, R2=30 k
W
, C=30 pF
When choosing RC oscillation, the RC oscillation frequency varies according to the fluctuation
of the external C and R2.
5.2 Fluctuation of RC oscillation frequencies
When choosing RC oscillation, the error of RC oscillation frequency due to process variations of
the IC is
±
4% maximum, and the fluctuation of the RC oscillation frequency when using a
capacitor (C) of
±
1% accuracy and a resistor (R2) of
±
2% accuracy is a maximum of
±
7%
approximately.
6. Ceramic Oscillation
Figure 6.1 shows an external circuit using a ceramic oscillator.
OSC1
OSC2
C1
C2
Figure 6.1 Ceramic Oscillation Diagram
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