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參數(shù)資料
| 型號： | LR38666Y |
| 廠商： | Sharp Corporation |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | CMOS digital signal processor |
| 中文描述： | CMOS數(shù)字信號處理器 |
| 文件頁數(shù)： | 11/38頁 |
| 文件大?。?/td> | 203K |
| 代理商： | LR38666Y |
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LR38666Y
11
FUNCTIONAL DESCRIPTION
Oscillation Circuit
The PLL included in the LR38666Y divides or
passes through the doubled frequency of the quartz
crystal connected to I/O pins, and provides it to the
internal logic circuits as shown in
Fig.1
and
Fig.2
.
C24MI (or C29MI or COMI)
Oscillation Circuit
(PLL)
Frequency
Divider
To Internal Logic
C24MO
(or C29MO or COMO)
Fig. 1 Block Diagram of Oscillation Circuit
R
D1
R
D2
C
1
C
2
C24MI
(or C29MI or COMI)
C24MO
(or C29MO or COMO)
Connection of Quartz Crystal (T
A
= 0 to +70C) : Example of Oscillation under Fundamental Frequencies
APPLICABLE PINS
FUNDAMENTAL
FREQUENCY [MHz]
RECOMMENDED COEFFICIENT
C
1
[pF]
10
10
10
C
2
[pF]
10
10
10
R
D1
[$]
220
220
220
R
D2
[$]
1 M
1 M
1 M
C24MI, C24MO
C29MI, C29MO
COMI, COMO
24.5454
29.5000
24.0000
NOTES :
1. The oscillation circuit should be located as close to C24MI, C24MO (C29MI, C29MO, COMI, COMO) as possible.
2. Do not install other signal lines in the shaded area.
3. Perform due evaluation on the match between the LR38666Y and the quartz crystal.
Fig. 2 Clock Input to Oscillation Circuit
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