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| 型號(hào)： | 9402AVK |
| 廠商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封裝： | 14 X 14 MM, 2 MM HEIGHT, PLASTIC, MS-022, MQFP-80 |
| 文件頁(yè)數(shù)： | 34/126頁(yè) |
| 文件大?。?/td> | 1673K |
| 代理商： | 9402AVK |
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DATA SHEET
Micronas
Aug. 16, 2004; 6251-552-1DS
15
2.2.3. Clamping
When using the dynamic softmix-mode with fast-blank,
clamping of fast-blank input must be disabled by
DCLMPF. The analog clamping value of red and blue
input (V and U resp.) can be adjusted by CLMPVRB.
The analog clamping value of green input (Y resp.) can
be adjusted by CLMPVG. Depending on the input sig-
nal format (YUV, RGB, sync signal or not) these bits
must be set accordingly. On the digital side, a correc-
tion of the analog clamping value must be performed
to reconstruct the blacklevel. This is achieved by RBO-
FST and GOFST. (see Table 2–6 on page 15)
2.2.4. Digital Prefiltering
A digital prefiltering can be enabled. A band limitation
is required, because the following deskewing filter per-
forms best at frequencies of below 14 MHz. The filter-
ing is performed in all four channels and can be dis-
abled by AABYP. For signal conversion to 4:2:2, an
additional chrominance lowpass can be enabled by
CHRSF. The deskewing filter can be disabled by
SKEWSEL. This is necessary when using the H50-pin
in connection with a Micronas picture-in-picture device
(e.g. SDA 938x, SDA 948x, SDA 958x). In this applica-
tion, the RGB input (in1, in2, in3) of the PiP can not be
used for other RGB/YUV signals (e.g. ‘SCART’ is not
possible). As there is a pixel skew on H50, this pin is
NOT suited to synchronize any IC, except for the
above mentioned PiP ICs
Fig. 2–18: Digital Prefiltering of RGB Input
2.2.5. RGB
→ YUV Matrix
RGB or YUV signals are selected by YUVSEL. The
matrix coefficients are set according to ITU recommen-
dations.
Fig. 2–19: RGB to YUV Matrix
Table 2–6: Configurations of input signals
Mode
CLMPVG
CLMPVRB
GOFST
RBOFST
DCLMPF
YUV, sync on Y
80
128
64
128
Don’t care
YUV, sync on H,V
16
128
0
128
0 (clamping enabled)
RGB, sync on G
80
16
64
0
Don’t care
RGB, sync on RGB
80
64
Don’t care
RGB, sync on H,V
16
0
0 (clamping enabled)
RGB with fast-blank, synchron to CVBS
16
0
1 (clamping disabled)
YUV with fast-blank, synchron to CVBS
16
128
0
128
1 (clamping disabled)
3
0
5
10
15
20
40
30
20
10
0
10
RGB-prefiltering
Frequency [MHz]
attenuation
[dB]
Y
U
V
R
G
B
0,299
0,587
0,114
0,147
–
0,289
–
0,436
0,615
0,515
–0,100
–
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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