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参数资料
| 型号： | DDP3315CQA |
| 厂商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封装： | PLASTIC, QFP-80 |
| 文件页数： | 10/62页 |
| 文件大小： | 1746K |
| 代理商： | DDP3315CQA |
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ADVANCE INFORMATION
18
Micronas
2.3.3. Horizontal Phase Adjustment
This section describes a simple way to get a correct
horizontal frame position and clamp window for analog
RGB insertion.
1. For a correct scaler function in panorama/water-
glass mode the digital input data should be centered to
the active video input signal.
2. The clamping pulse for analog RGB insertion can be
adjusted to the pedestal of the input signal with
POFS2.
3. The horizontal raster position of the analog inserted
RGB1/2 signal can be set to the desired frame position
with POFS3.
4. The horizontal position of the digital RGB signal can
be shifted to the left and right with NEWLIN. Following
values allowed in respect to POFS2:
90 < (POFS2+NEWLIN)
(clk SFIF) < 580
clk = 3 @ LLC2 = 27 MHz
clk = 2,5 @ LLC2 = 32 MHz
5. Now the positioning of horizontal blanking and the
picture frame generator can be done.
2.3.4. Vertical Synchronization
The number of lines per field can be adjusted by soft-
ware (LPFD). This number is used to calculate the ver-
tical raster. The DDP synchronizes only to a vertical
sync within a programmable detection window (LPFD
± VSYNCWIN). If there is no vsync the DDP runs with
maximum allowed lines and if the vertical frequency is
to high it runs with minimum allowed lines. The smaller
the detection window the slower the DDP gets syn-
chronized to the incoming vertical sync. In case of an
interlaced input signal it is possible to display both
fields at the same raster position by setting R_MODE
to 1 or 2.
An automatic field length adaptation can be selected
(VA_MODE). In this case the vertical raster will be cal-
culated according to the counted number of lines per
field instead from LPFD. This is useful for video
recorder search mode when the number of lines per
field does not comply with the standard, or if you want
to use a common value of LPFD for PAL and NTSC
(e.g.: LPFD = 290; VSYNCWIN = 54).
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