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參數(shù)資料
| 型號(hào)： | TC90A67F |
| 元件分類： | 畫面疊加 |
| 英文描述： | PICTURE-IN-PICTURE IC, PQFP80 |
| 封裝： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 23/24頁 |
| 文件大?。?/td> | 321K |
| 代理商： | TC90A67F |
TC90A67F
2002-02-06
8
5.
Vertical Reduction
It is necessary to reduce vertical direction concerning PIP mode, and vertical reduction is carried out
from multiplication of coefficient as below. Vertical reduction is selectable using VWS.
(VWS: sub address 10hex)
Vertical Reduction
1H
Coefficient
2H
Coefficient
3H
Coefficient
4H
Coefficient
5H
Coefficient
6H
Coefficient
1/3 (VWS [1:0]
00)
1/4
1/2
1/4
1/4 (VWS [1:0]
01)
1/8
3/8
1/8
1/5 (VWS [1:0]
10)
1/16
1/4
3/8
1/4
1/16
1/6 (VWS [1:0]
11)
1/16
3/16
1/4
3/16
1/16
6.
The Sub Picture’s Area of Writing in the Field Memory and Reading from the Field
Memory
Writing start position is defined horizontal start point to write (sub address 16hex: CHS) and vertical
start point to write. (sub address 16hex: CVSN or sub address 17hex: CVSP)
CVSN: Vertical frequency of sub picture is 60 Hz
CVSP: Vertical frequency of sub picture is 50 Hz
Horizontal width of the sub picture is defined by sampling number of horizontal direction. (sub address
1Ahex: HSPL) The number of writing vertical lines is determined internally according to vertical frequency
of the main picture and VWS.
Reading start position is defined horizontal start point to read (sub address 14hex: PHS) and vertical
start point to read. (sub address 14hex: PVSN or 15hex: PVSP)
PVSN: Vertical frequency of sub picture is 60 Hz
PVSP: Vertical frequency of sub picture is 50 Hz
Horizontal display size of the sub picture is defined by PHW (sub address 12hex) and the readout
number of vertical lines is defined by PVWN (sub address 12hex) or PVWP (sub address 13hex).
PVWN: Vertical frequency of sub picture is 60 Hz
PVWP: Vertical frequency of sub picture is 50 Hz
7.
DACs for Y Signal and Color Difference Signal
TC90A67F is built-in three 8 bit-DAC in motion on 24 MHz. Output dynamic range is determined by the
difference between VDD and VREFD terminal voltage. Standard level is 1.5 Vp-p.
8.
ACC Control
ACC control is carried out comparing demodulation result of color burst signal with set reference level by
ACCPAL or ACCNTSC register. (ACCPAL, ACCNTSC: sub address 21hex)
When compared value is less than the reference level, controller puts on gain, and more than reference
level, controller cuts down one.
9.
Peaking Circuit for Y Signal
It is possible to carry out a clear picture according to putting up some frequency bandwidth when sub
picture becomes indistinct picture for reducing high frequency bandwidth using LPF for Y signal. There are
two kinds of characteristics for LPF, and it is selectable about gain of four stages respectively using YPKGS
and YPKGG.
YPKGS: select for LPF characteristics (sub address 10hex)
YPKGG: select for gain (sub address 10hex)
10. PGB Matrix Circuit
For a built-in RGB matrix circuit, and when RGBON = 1, it can be changed R-Y, Y, B-Y into RGB signal.
How to find the value of coefficient (a, b, c) is as below.
1Chex: MTXCR: a, MTXCG2: b, MTXCG1: c (on condition 0 a 1, 0 b 1, 0 c 1)
R a (R Y) Y
G b { (R Y)} c { (B Y)} Y
B (B Y) Y
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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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| TC90A69FG(ELP) | 功能描述:視頻 IC Multi Color 3Line Comb RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| TC90A69NG | 功能描述:視頻 IC Multi Color 3Line Comb RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| TC90A80F | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:3-Line Digital Comb Filter for VCR, YNR/CNR, and Skew Correctors (NTSC) |
| TC90A80N | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:3-Line Digital Comb Filter for VCR, YNR/CNR, and Skew Correctors (NTSC) |
| TC90A92AFG | 制造商:TOSHIBA 制造商全稱:Toshiba Semiconductor 功能描述:3D comb & Video Decoder |
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