參數(shù)資料
型號(hào)： LM1246AAA/NA
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 音頻／視頻放大
英文描述： 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24
封裝： PLASTIC, DIP-24
文件頁(yè)數(shù)： 13/51頁(yè)
文件大?。?/td> 2794K
代理商： LM1246AAA/NA
OSD Generator Operation (Continued)
WINDOWS
Two separate windows can be opened, utilizing the data
stored in the page RAM. Each window has its own horizontal
and vertical start position, although the second window
should be horizontally spaced at least two character spaces
away from the first window, and should never overlap the
first window when both windows are on. The OSD window
must be placed within the active video.
OSD VIDEO DAC
The OSD DAC is controlled by the 9-bit (3x3 bits) OSD video
information coming from the pixel serializer look-up table.
The look-up table in the OSD palette is programmed to
select 4 color levels out of 8 linearly spaced levels per
channel. The OSD DAC is shown in Figure 16, where the
gain is programmable by the 2-bit OSD contrast register, in 4
stages to give the required OSD signal. The OSD DACs use
the reference voltage, V
REF, to bias the OSD outputs.
OSD VIDEO TIMING
The OSD analog signal then goes to the switch, shown in
Figure 16 and Figure 1 where the timing control switches
from input video to OSD and back again as determined by
the control registers. This is also where horizontal and ver-
tical blanking are also inserted at their appropriate intervals.
20068528
FIGURE 15. Bank Addressing
20068529
FIGURE 16. Block Diagram of OSD DACs
LM1246
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相關(guān)PDF資料
PDF描述
LM1247AAG/NA/NOPB 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM1246AAC/NA 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC 150MHZ RGB PREAMP 1246 DIP24
LM1246AAC/NA/NOPB 功能描述:IC PREAMP RGB 150MHZ 24-DIP RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類(lèi)型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類(lèi)型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱(chēng):SP000365064
LM1246NA 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs
LM1247 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character RAM and 4 DACs
LM1247AAG/NA 功能描述:IC PREAMP CMOS 150MHZ 24DIP RoHS:否 類(lèi)別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類(lèi)型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類(lèi)型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱(chēng):SP000365064
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