- 您现在的位置：买卖IC网 > PDF目录30743 > LM1247AAG/NA/NOPB (NATIONAL SEMICONDUCTOR CORP) 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 PDF资料下载
参数资料
| 型号： | LM1247AAG/NA/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| 封装： | PLASTIC, DIP-24 |
| 文件页数： | 8/48页 |
| 文件大小： | 3141K |
| 代理商： | LM1247AAG/NA/NOPB |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页
OSD Generator Operation (Continued)
varied under I
2C compatible control, but the total number of
characters that can be stored and displayed on the screen is
limited to 512 including any End-of-Line and End-of-Screen
characters. The horizontal and vertical start position can also
be programmed through the I
2C compatible bus.
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 14, 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
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.
20048428
FIGURE 13. Bank Addressing
LM1247
www.national.com
16
相关PDF资料 |
PDF描述 |
|---|---|
| LM1253AAE/NA | ON-SCREEN DISPLAY IC, PDIP28 |
| LM1267NA/NOPB | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| LM1269NA/NOPB | 3 CHANNEL, VIDEO PREAMPLIFIER, PDIP24 |
| LM1276AAA/NA | 1 CHANNEL, VIDEO PREAMPLIFIER, PDIP28 |
| LM1279AN/NOPB | 3 CHANNEL, VIDEO AMPLIFIER, PDIP20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM1247DMC/NA | 制造商:Texas Instruments 功能描述: |
| LM124A | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Low Power Quad Operational Amplifiers |
| LM124AD | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:LOW POWER QUAD OPERATIONAL AMPLIFIERS |
| LM124ADR | 制造商:TI 制造商全称:Texas Instruments 功能描述:QUADRUPLE OPERATIONAL AMPLIFIERS |
| LM124ADT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage-Feedback Operational Amplifier |
发布紧急采购，3分钟左右您将得到回复。