參數(shù)資料
型號： HD49815TF
廠商： Hitachi,Ltd.
英文描述： Digital Camera Signal Processor(數(shù)碼相機信號處理器)
中文描述： 數(shù)碼相機信號處理器（數(shù)碼相機信號處理器）
文件頁數(shù)： 12/25頁
文件大?。?/td> 91K
代理商： HD49815TF
HD49815TF
12
Crystal Oscillation Circuit
1. Measuring conditions
The oscillation frequency was measured under the following conditions.
V
CC
1 = 5.0 V
V
CC
2 = 3 V
Ta = 25
°
C
8 MHz, 20 MHz, and 24 MHz:
Rf = 1 to 10 M
Cin, Cout = 20 pF (
±
20 pF)
32 MHz:
Rf = 1 to 10 M
Cin = 20 pF (
±
20 pF)
Cout = 100 pF (
±
20 pF), Co = 15 pF (
±
5 pF), Lout = 1
μ
H
The conditions above may be changed within the range of measuring conditions.
2. Measuring method
Under the measuring conditions above, two methods were tested.
fmin. = 20 MHz, and fmax. = 32 MHz (applied to pins 26 and 27)
fmin. = 8 MHz, and fmax. = 24 MHz (applied to pins 34 and 35)
Note:
The oscillation start time tosc is max. = 200 ms.
3. Measuring circuit
Xout
Cout
Cin
Co
Lout
Note: The part enclosed by the dotted line in the above
circuit is used when measuring at 32 MHz.
To the internal circuit
Monitor pin
Xin
Dividing
counter
Counter
Figure 1 Measuring Circuit
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