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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： | 5/62页 |
| 文件大小： | 1746K |
| 代理商： | DDP3315CQA |
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ADVANCE INFORMATION
Micronas
13
2.2. Analog Back End
The digital RGB signals are converted to analog RGB
by three 10-bit digital to analog converters (DAC).
Each RGB signal has two additional DACs with 9-bit
resolution to adjust analog brightness (40% of the full
RGB range) and cutoff / black level (60% of the full
RGB range). An additional fixed current is applied for
the blanking level.
The back-end supports the insertion of two external
analog component signals, e. g. OSD or analog HDTV.
These signals are clamped, processed in an analog
matrix (RGB2), converted by a voltage/current con-
verter (VCC), and inserted into the main RGB by the
fast blank switch.
The analog RGB outputs are current outputs with cur-
rent-sink characteristics. The maximum current drawn
by the output stage is obtained with peak white RGB.
The controlling of the whitedrive/analog brightness and
also the external contrast and brightness adjustments
is done via the internal Processor.
2.2.1. Analog RGB Insertion
The DDP 3315C supports the insertion of
– 2 external analog RGB signals or
– 1 external analog RGB and 1 external YCrCb/YPrPb
signal.
Each component signal is clamped, converted to RGB
if required, and inserted into the main RGB by the fast
blank switch. The external component signals are
adjustable independently as regards DC level (bright-
ness) and magnitude (contrast).
The second external analog input is processed by an
analog matrix with control of color saturation and pro-
grammable half contrast.
Fig. 2–10: Fast Blank selection logic
Over-/underlay of the external component signal and
the main RGB signal depends on the fast blank input
Fig. 2–10). Both fast blank inputs must be either active
low or active high.
All signals for analog component insertion (RIN1/2,
GIN1/2, BIN1/2, FBLIN1/2, HCS) must be synchro-
nized to the digital RGB.
External YCrCb/YPrPb signals are converted to RGB
by the following matrix.
Table 2–5: Matrix coefficients for 480P and 1080I
I2C Setting
MAT-
Type
0 1 0
1 0 0
0 0 1
Standard
ITU-R 601 / 480P
(SMPTE 293M)
1080I
(ITU-R709)
RGB
(Bypass)
Krr
1.402
1.575
0
Kgb
0.344
0.187
0
Kgr
0.7144
0.468
0
Kbb
1.773
1.856
0
FBFOH1
FBFOL1
FBPOL
FBPRIO
FBLIN1
FBLIN2
FBFOH2 FBFOL2 FBMON
Fast
Blank
Monitor
Fast
Blank
Selection
FB
int
#
R
G
B
10
K
rr
1 K
gb Kgr
1 K
bb
0
Y
C
b
C
r
=
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