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參數資料
| 型號： | ADV7312KST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 顏色信號轉換 |
| 英文描述： | Multiformat 11-Bit HDTV Video Encoder |
| 中文描述： | COLOR SIGNAL ENCODER, PQFP64 |
| 封裝： | MS-026BCD, LQFP-64 |
| 文件頁數： | 34/84頁 |
| 文件大小： | 975K |
| 代理商： | ADV7312KST |
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REV. 0
–34–
ADV7312
CLK
ACTIVE VIDEO
PROGRAMMABLE
INPUT TIMING
ANALOG
OUTPUT
81
66
66
243
1920
HORIZONTAL SYNC
e
d
c
b
a
P_HSYNC
P_VSYNC
P_BLANK
SET ADDRESS 10h,
BIT 6 TO 1
Figure 28a. Async Timing Mode—Programming Input Control Signals for SMPTE 295M Compatibility
ACTIVE VIDEO
0
1
HORIZONTAL SYNC
e
d
c
b
a
CLK
P_HSYNC
P_VSYNC
P_BLANK
SET ADDRESS 10h,
BIT 6 TO 1
ANALOG OUTPUT
Figure 28b. Async Timing Mode—Programming Input Control Signals for Bilevel Sync Signal
TIMING MODES
HD Async Timing Mode
[Subaddress 10h, Bit 3, 2]
For any input data that does not conform to the standards select-
able in input mode, Subaddress 10h, asynchronous timing mode
can be used to interface to the ADV7312. Timing control signals for
HSYNC
,
VSYNC
, and
BLANK
have to be programmed by the
user. Macrovision and programmable oversampling rates are not
available in async timing mode.
In async mode, the PLL must be turned off [Subaddress 00h,
Bit 1 = 1].
Figure 28a and Figure 28b show examples of how to program
the ADV7312 to accept a different high definition standard other
than SMPTE 293M, SMPTE 274M, SMPTE 296M, or
ITU-R BT.1358.
The following truth table must be followed when programming the
control signals in async timing mode. For standards that do not
require a tri-sync level,
P_BLANK
must be tied low at all times.
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