- 您現在的位置：買賣IC網 > PDF目錄30743 > LM1253AAE/NA (NATIONAL SEMICONDUCTOR CORP) ON-SCREEN DISPLAY IC, PDIP28 PDF資料下載
參數資料
| 型號： | LM1253AAE/NA |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 畫面疊加 |
| 英文描述： | ON-SCREEN DISPLAY IC, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁數： | 16/61頁 |
| 文件大小： | 1671K |
| 代理商： | LM1253AAE/NA |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁當前第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁
OSD Generator Operation
Page Operation
The block diagram of the OSD generator is shown
Figure 32.
Video information is created using any of the 256 pre-
defined characters stored in the mask programmed ROM.
Each character has a unique 8 bit code that is used as its
address. Consecutive rows of characters make up the dis-
played window. These characters can be stored in the page
RAM, written under I
2C controlled commands by the monitor
micro-controller. Each row can contain any number of char-
acters up to the limit of the displayable line length, although
some restrictions concerning the enhanced features apply
on character rows longer than 32 characters
The number of characters across the width and height of the
page can be varied under I
2C control, but the total number of
characters that can be stored and displayed on the screen is
limited to 512 including any row end, skip line, and window
end control characters. The horizontal and vertical start po-
sition can also be programmed under I
2C control.
OSD Video DAC
The OSD DAC is controlled by the 9 bit (3x9 bits) OSD video
information coming from the pixel serializer look-up table.
The OSD DAC is shown in the
Figure 33, where the gain is
programmable by the 2 bit OSD CONTRAST register, in 4
stages to give the required OSD signal.
The analog signal created by the OSD DACs is biased with
respect to V
REF.
DS101265-36
FIGURE 32. Block Diagram of the OSD Generator
DS101265-37
FIGURE 33. Block Diagram of OSD DACs
LM1253A
www.national.com
23
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| LM1279N/NOPB | 1 CHANNEL, VIDEO AMPLIFIER, PDIP20 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LM1253AN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Monolithic Triple 180 MHz I2C CRT Pre-amp With Integrated Analog On Screen Display (OSD) Generator |
| LM-1256 | 制造商:ROHM 制造商全稱:Rohm 功能描述:16 x 16 matrix displays |
| LM-1256_1 | 制造商:ROHM 制造商全稱:Rohm 功能描述:16】16 matrix displays |
| LM-1256LB1 | 制造商:ROHM 制造商全稱:Rohm 功能描述:16】16 matrix displays |
| LM125AN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:VOLTAGE REGULATORS |
發布緊急采購，3分鐘左右您將得到回復。