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參數(shù)資料
| 型號： | S5D0127X01 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | MULTISTANDARD VIDEO DECODER/SCALER |
| 中文描述： | 多標準視頻解碼器/倍線器 |
| 文件頁數(shù)： | 12/96頁 |
| 文件大?。?/td> | 1509K |
| 代理商： | S5D0127X01 |
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ELECTRONICS
S5D0127X01 Data Sheet
MULTIMEDIA VIDEO
PAGE 12 OF 96
Modified on May/04/2000
1.2. VIDEO TRACKING AND TIMING GENERATION
When the S5D0127X01 is configured for analog video input, the chip tracks the video input and generates a
sampling clock that is line locked to the input video. The S5D0127X01 requires an external reference clock for
video tracking. This reference can be supplied via a crystal using the on chip crystal interface or any TTL
compatible source. These configurations are shown in Figure 5
1.2.1. Clock Input Timing Reference
The S5D0127X01 can use either a 24.576 MHz or a 26.8 MHz reference. However, it is recommended that the
24.576 MHz reference be used for CCIR 601 operation, and the 26.8 MHz reference be used for square pixel or
dual mode operation. Other specifications for the crystal are:
Fundamental or third overtone
Load capacitance of ~20 pF
Series resistance of 40
or less
Frequency deviation of 50 ppm or less over operating temperature range
Figure 5. Standard Clock Configurations
1.2.2. The Sampling Clock
The sampling clock is generated by multiplying the line rate by N. This ensures that samples are aligned
horizontally, vertically and in time. The required N factor for the S5D0127X01 is based upon the field rate (60 Hz or
50 Hz) and the desired sampling rates (CCIR 601 or square pixel). Field rate can be automatically detected and
can be monitored with the
FFRDET
bit in the
STAT
register. Manual control of the field rate can be controlled with
the
MNFMT
and
IFMT
bits. The
PIXSEL
bit in register
CMDA
selects CCIR 601 or square pixel. Table 3 shows the
constants for the various combinations of input formats and output pixel rates.
Using a Crystal
S5D0127X01
8
7
Using a Clock
24.576 MHz
TTL Clock
24.576 MHz
22 pF
22 pF
N. C.
XTALI
XTALO
S5D0127X01
8
7
XTALI
XTALO
391 pF
5.7
μ
H
Optional for 3rd
harmonic crystal
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